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Experience Level
Senior
About the job
GoCardless is looking for a Senior Software Development Engineer based in Lisbon, Portugal. The main focus is on developing and refining software that helps businesses handle payment processing more easily across the globe.
What you will do
Collaborate with engineers to design, build, and launch new product features
Improve existing systems with an emphasis on performance and security
Support a dependable and user-friendly experience for customers
The team
This engineering group values quality and the impact of their work. Team members prioritize collaboration and technical skill in their daily projects.
Role overview GoCardless is looking for a Senior Software Development Engineer based in Lisbon, Portugal. The main focus is on developing and refining software that helps businesses handle payment processing more easily across the globe. What you will do Collaborate with engineers to design, build, and launch new product features Improve existing systems wit…
Join inetum2 as a .NET Software Engineer and take your career to the next level! We are looking for passionate individuals who thrive in a dynamic environment and are eager to contribute to innovative projects. You will collaborate with a talented team to design, develop, and maintain software solutions that drive our business forward.
Join the Tripadvisor Group, where we connect people with unforgettable experiences and strive to be the world's most trusted source for travel and adventure. Utilizing our vast portfolio of travel brands and advanced technology, we aim to engage a global audience and facilitate meaningful connections with our partners across diverse travel categories including accommodations, restaurants, and unique experiences. The Tripadvisor Experiences Engineering team, distributed across Europe, plays a pivotal role in managing Tripadvisor.com and our mobile applications, alongside the supporting infrastructure. We empower operators to grow their businesses while enabling third parties to leverage our comprehensive inventory. Our dedicated team provides essential tools that support our customer service representatives in delivering exceptional service to travelers and operators worldwide. We are in search of a Senior Software Engineer to become part of our dynamic team. This position is available to candidates who can commute (generally within a 2-hour radius) to one of our office hubs in Lisbon. We appreciate flexibility in work arrangements and value the importance of in-person interactions for collaboration and connection. Expect a remote-first work model complemented by periodic office gatherings for team planning and engagement. At Tripadvisor, our engineers thrive on tackling a diverse array of technical challenges. This backend-focused full-stack role primarily involves backend development, with opportunities to engage in frontend projects as well. While a willingness to learn is essential, expertise in frontend development is not required at the outset, as we offer on-the-job training. Our collaborative environment is designed for productivity, where engineers work closely with product managers and designers throughout the entire software development lifecycle—from design and coding to testing and deployment. Most engineers deploy code to production every few days within our daily release cycle. The technology stack at Tripadvisor includes Java, React, Typescript, GraphQL, Kubernetes, SQL, and NoSQL databases on AWS. While strong proficiency in Java is mandatory, familiarity with the entire stack is not a prerequisite; a passion for learning is what we value most. Why Work with Us? Competitive compensation packages, including base salary, annual bonuses, and more. “Work your way” approach offering flexibility to cater to your lifestyle and needs.
At Thought Machine, we are on a transformative mission to liberate banks from the constraints of outdated technology. Our innovative core and payments technology operates natively in the cloud, laying the groundwork for modern banking solutions. Our ambitious vision demands exceptional talent collaborating to create groundbreaking technology.Having expanded rapidly in recent years, our team now comprises over 550 skilled professionals across our offices in London, New York, Singapore, Sydney, and our newly launched Engineering Hub in Lisbon. With over £500 million in funding, our esteemed investors include Molten Ventures, Eurazeo, Intesa Sanpaolo, Temasek, Nyca Partners, JPMorgan Chase Strategic Investments, and Standard Chartered Ventures.We pride ourselves on nurturing a culture that fosters excellence and enjoyment, with frequent accolades for our vibrant workplace environment. Recognized by Sifted magazine for having one of the highest Glassdoor ratings among UK fintech companies, we also offer one of the industry's most generous employee share packages. Our innovative spirit has earned us a spot on Global Finance Magazine's list of the world's most innovative fintechs and recognition from the Financial Times as one of Europe's fastest-growing companies for two consecutive years.As we continue to scale, our Software Engineering team plays a crucial role in our success. We strive for engineering excellence, embracing best practices and modern technologies to drive our mission forward.As a Senior Software Engineer, you will tackle complex challenges across the technology stack, developing high-quality, scalable, secure, and performant code that enhances user experience. You will take full ownership of requirements, translating them into engineering designs, task breakdowns, and implementations, while creating both backend services and engaging frontend experiences.Our diverse clientele ranges from major global financial institutions to regional banks, requiring our systems to be adaptable and customizable for varying user needs. As a bridge between back-end and front-end development, you will craft seamless experiences that captivate our clients.
Join Dashlane as a Junior Backend Software Engineer and embark on a journey to enhance user security and experience. In this role, you will collaborate with seasoned engineers to design and develop backend solutions that power our innovative password management platform.As a key member of our engineering team, you will engage in coding, debugging, and testing applications while contributing to architecture discussions. This is an excellent opportunity for those eager to learn and grow in a supportive environment.
Location: LisbonCompany: aghanim About the Role aghamim is seeking an AI Solutions Engineer with a focus on multi-agent Large Language Model (LLM) systems. This position centers on designing and building agent-based solutions that interact with internal APIs and product workflows. The work goes beyond coding: a strong grasp of user needs and system reliability is essential. This role blends systems engineering and architecture, setting it apart from typical machine learning jobs. Expect to explore APIs and workflows independently, developing agent-driven integrations that fit seamlessly into the platform. Platform Context The product platform exposes many internal APIs. Agents interact directly with these APIs and product workflows. Use cases and workflows are diverse. Agents operate on small data volumes but require complex orchestration. Autonomous operation is key: agents must use tools, routing, memory, and fallback strategies effectively. Backend is primarily Python; frontend uses TypeScript. Main Responsibilities Agent Architecture and System Design Design and implement multi-agent systems, including orchestrator and worker agents. Define agent architecture, focusing on routing, memory, tool usage, and fallback strategies. Translate product requirements into scalable, reliable agent workflows. Ensure systems are maintainable, extensible, and robust. Agent Infrastructure and Development Build core infrastructure for agent execution, including tool calling and state management. Develop and maintain multimodal pipelines for text and image generation. Integrate and abstract model providers such as OpenAI, Anthropic, and self-hosted models. Implement custom tools and services to extend agent capabilities. Platform Integration Connect agents with internal platform APIs and product workflows.
Join the dynamic team at Fundraisr as a Junior Full-Stack Software Engineer in Lisbon! This pivotal role aims to enhance our modular, service-oriented architecture while scaling a platform that has impressively achieved $1M ARR.Your mission will be to transition our platform to a high-performance, enterprise-grade ecosystem that streamlines the fundraising lifecycle through the power of automation and AI.Key Responsibilities:Develop and refine our React 18 Single-Page Application using TypeScript and Vite to ensure efficient production builds.Oversee backend logic with Node.js Vercel Serverless Functions and design the database API layer utilizing Supabase and PostgreSQL.Integrate features leveraging OpenAI and Anthropic APIs for campaign classification and personalized outreach generation.Facilitate bi-directional synchronization with SmartLeads, and create OAuth infrastructures for Google and Microsoft integrations.Implement Row-Level Security (RLS) for multi-tenant isolation and prepare our infrastructure for GDPR compliance and SOC 2 certification.
Join Dashlane as a Backend Software Engineer and be part of a dynamic team dedicated to enhancing digital security for our users worldwide. In this role, you will design, develop, and maintain scalable backend systems that support our innovative applications. Your contributions will directly impact the user experience and the overall success of our products.
Join our dynamic team at inetum2 as a Software Test Engineer. In this role, you will play a crucial part in ensuring the quality and performance of our software products. You will collaborate with cross-functional teams to identify and resolve software issues, implement testing protocols, and contribute to the overall improvement of our development processes.
SingleStore is offering a paid, 12-week Software Engineer Internship in Lisbon, Portugal for Summer 2026. This program places interns within the Engine group, where hands-on learning and mentorship from experienced engineers are central. The internship is designed to help students develop technical skills while contributing to meaningful projects. What you will do Join a small, collaborative engineering team focused on improving SingleStore’s database engine Work on projects that span the full product life cycle, from design and coding to testing and deployment Explore technologies such as large language models (LLM) and vector indexing Enhance the fault tolerance of SingleStore clusters Optimize SQL query performance using methods like SIMD and LLVM code generation Develop modules for query optimization, including search and costing components Write and test software, gaining exposure to both technical and business aspects Interns can expect support from engineers who value mentorship and professional growth. There are also opportunities to learn about other business areas, including product, marketing, and sales. Teamwork and celebrating shared successes are part of the culture, with group meals and outings in and around Lisbon. Requirements Currently enrolled in a Bachelor’s program in Computer Science, Computer Engineering, Electrical Engineering, or a related field Strong understanding of computer science fundamentals Proficiency in C++ or C Interest in building reliable software Solid grasp of algorithms and data structures Preferred experience Previous internship in software development
inetum2 is seeking a passionate and detail-oriented Software Test Engineer - Automation to join our innovative team in Lisbon. In this role, you will be responsible for developing and executing automated test scripts, ensuring high-quality software delivery, and contributing to the continuous improvement of our testing processes.You will work closely with developers and product managers to understand requirements, design test cases, and document results. Your expertise in automation tools and testing methodologies will be crucial in identifying defects and enhancing product performance.
Join SingleStore as a Senior/Principal Software Engineer and contribute to our mission of revolutionizing data management. As a key player in our engineering team, you will work on cutting-edge technologies and be instrumental in developing innovative solutions that empower our clients to manage their data efficiently.
Join Cross Border Talents as a Senior Software Engineer and be part of an exciting transformation in the banking sector for our client in Lisbon, Portugal.Are you an innovative and passionate Software Engineer eager to make a significant impact? This is your chance! Join our dynamic team and help shape the future of banking in Lisbon, Portugal! In your role as a Senior Software Engineer, you will: Create robust, scalable solutions that propel our projects forward. Engage in close collaboration with product owners, business analysts, quality assurance teams, and fellow engineers. Seamlessly integrate UI components with APIs and databases to ensure a stellar user experience. Contribute to agile ceremonies promoting teamwork and continuous improvement. Partner with technology leads to design maintainable, resilient systems tailored to our project requirements.
About UsAt Supermodular AI, we empower organizations to successfully navigate the complexities of AI Transformation. Our philosophy centers on actionable strategies that yield tangible results.While many companies recognize the transformative potential of AI, they often find it challenging to implement this technology into their existing operations. The real obstacles typically lie not in the technology itself but in the integration of AI within long-standing processes and systems. We believe that true transformation is achieved not just through strategic documentation, but through the actual development, deployment, and management of AI systems in real-world environments.We collaborate closely with enterprise IT and software development teams to design and implement robust AI systems tailored to their unique challenges. This partnership enables engineering teams to innovate and adopt AI-native development methodologies that fundamentally alter the way they create and operate software. Additionally, we specialize in constructing custom AI solutions that overcome modernization hurdles where conventional approaches have faltered.Our team boasts a proven history of developing impactful AI systems and scaling engineering teams within complex enterprises. If you thrive on tackling challenging enterprise issues and are excited about transforming ambitious concepts into operational systems, Supermodular AI is the right place for you.Your ResponsibilitiesAs a Forward Deployed Security Engineer (AI Systems) at Supermodular AI, you will collaborate with enterprise IT and software teams to ensure the secure, reliable, and safe operation of AI systems in production settings.You will be integrated within real enterprise environments, partnering with engineers and technical leaders to assess current system operations, identify weaknesses, and understand how AI can impact the risk landscape.Your responsibilities will involve navigating complex and often imperfect system architectures, pinpointing vulnerabilities, creating secure frameworks, and fortifying systems that may not have been initially designed with AI considerations in mind.Your engagement will encompass the complete lifecycle of projects. You will contribute to early-stage technical strategies, embed security and reliability into system designs, and implement necessary safeguards to ensure systems function effectively under real-world conditions.Many of the environments you will encounter may lack cleanliness and completeness; systems could be poorly integrated or designed without security in focus. Your mission will be to introduce structure and resilience to these settings by building and securing systems capable of safe operation in challenging circumstances.
Join Dashlane as a Junior Frontend Software Engineer, where you'll play a vital role in creating seamless user experiences. You will collaborate with a dynamic team of developers and designers to build innovative web applications that delight users. If you're passionate about frontend technologies and eager to learn in a fast-paced environment, this is the perfect opportunity for you.
lastminute.com is looking for a Software Engineer in Lisbon to focus on ETL processes and microservices development. This role supports the company’s travel and leisure platform as it continues to grow. Key responsibilities Design and implement scalable ETL pipelines for efficient data processing and transformation Develop and maintain microservices that power essential platform features Collaborate with team members to enhance service delivery and boost system performance Help optimize existing data workflows and improve service integrations Team and impact The engineering team works together to deliver dependable solutions used by millions of travelers. Efforts in this position will streamline data handling and support new features across the platform.
Role Overview Trustly is looking for a Senior Software Engineer in Lisbon, Portugal. This role focuses on building and improving payment solutions that help make online transactions smoother and more secure. The team values collaboration and creative problem-solving while working to extend the platform’s features.
Role Overview Speechify is hiring an iOS Core Product Software Engineer in Lisbon, Portugal. This role focuses on building and improving our core iOS product. The work centers on delivering strong user experiences and advancing the app’s capabilities. What You Will Do Design, build, and maintain features for the iOS platform Collaborate closely with product, design, and engineering teams Contribute to high-quality software solutions that shape the core Speechify experience Location This position is based in Lisbon, Portugal.
At Arkadium, we believe in the joy of creating fun experiences, and for the past 20 years, we have done just that. As the creators of some of the world’s most-played games, including the iconic Solitaire that has graced countless Windows machines, our games are available on Arkadium.com, iOS, Android, and numerous prominent platforms worldwide.As a proud Evergreen business, our core values of Fierce Drive, Positive Energy, and Living Full Lives guide our operations and decisions.We are a privately held company (ensuring stability and a balanced approach to growth), founder-led (demonstrating passion for our craft), and we consistently earn accolades as a “Best Place to Work” – we are not your average gaming company.Recognized by 'Happiness Works' in 2023, 2024, and 2025 in Portugal, alongside 'Crain's Best Places to Work 2022' and 'Great Place to Work 2022 and 2023' in New York, we take pride in our culture!If you're excited about becoming an Arkadian, we would love to hear from you!OverviewArkadium is on the lookout for an outstanding and seasoned Senior Full-Stack Engineer to join our Core Tech team.Our Core Tech team operates with a backend-first philosophy, developing and refining shared services that power essential functionalities in Arkadium’s games and platforms. This includes authentication, chat, tournaments, friend systems, inventory management, microtransactions, and multiplayer infrastructure (Nakama) among other platform-wide capabilities.What You’ll DoLead the technical direction and delivery of complex, scalable full-stack systems utilized by live games.Design and make architectural decisions for backend and frontend systems, striking a balance between performance, scalability, and long-term maintainability.Develop and enhance backend services and APIs that support real-time, live-operated games.Seamlessly integrate backend systems with web-based frontends and browser games.Empower internal game teams by creating shared services, frameworks, and developer tools.Design, implement, and maintain reliable data models focusing on accuracy, security, and high performance.Identify performance bottlenecks throughout the stack and proactively initiate optimizations.Establish and uphold security standards for authentication, authorization, and data protection.Set engineering quality benchmarks through code reviews, architectural guidance, and mentoring.Create clear technical documentation and decision records to facilitate long-term ownership and knowledge transfer.Stay updated with modern backend, frontend, and infrastructure practices while continuously raising the technical standards of the team.Collaborate closely in an agile environment, contributing to planning, execution, and ongoing improvements.
SingleStore is hiring a Software Engineer Intern to join the Helios team in Lisbon, Portugal for Summer 2026. This is a paid, 12-week internship designed to provide hands-on experience with real-time technologies that support business operations around the globe. Internship Experience Interns at SingleStore work side by side with engineering teams, contributing directly to projects that move quickly from concept to production. Each intern takes ownership of a project, following it through the full product lifecycle. Throughout the program, experienced engineers provide mentorship and share both technical and business insights. Collaboration extends beyond engineering, with opportunities to work with product, marketing, and sales teams. Achievements are celebrated together, both in the office and at events across Lisbon. What you will do Join small teams to develop and test new product features Deploy code to production incrementally during the internship Experience the full software development process from start to finish Build a broad understanding of SingleStore’s products and business Requirements Currently enrolled in a Bachelor’s program in Computer Science, Electrical Engineering, Computer Engineering, or a related field Strong foundation in computer science fundamentals Proficiency in at least one programming language: JavaScript, Golang, or TypeScript Interest in creating highly reliable software Solid understanding of algorithms and data structures Preferred experience Familiarity with operating systems, distributed systems, concurrency, multithreading, or server architectures
Role overview GoCardless is looking for a Senior Software Development Engineer based in Lisbon, Portugal. The main focus is on developing and refining software that helps businesses handle payment processing more easily across the globe. What you will do Collaborate with engineers to design, build, and launch new product features Improve existing systems wit…
Join inetum2 as a .NET Software Engineer and take your career to the next level! We are looking for passionate individuals who thrive in a dynamic environment and are eager to contribute to innovative projects. You will collaborate with a talented team to design, develop, and maintain software solutions that drive our business forward.
Join the Tripadvisor Group, where we connect people with unforgettable experiences and strive to be the world's most trusted source for travel and adventure. Utilizing our vast portfolio of travel brands and advanced technology, we aim to engage a global audience and facilitate meaningful connections with our partners across diverse travel categories including accommodations, restaurants, and unique experiences. The Tripadvisor Experiences Engineering team, distributed across Europe, plays a pivotal role in managing Tripadvisor.com and our mobile applications, alongside the supporting infrastructure. We empower operators to grow their businesses while enabling third parties to leverage our comprehensive inventory. Our dedicated team provides essential tools that support our customer service representatives in delivering exceptional service to travelers and operators worldwide. We are in search of a Senior Software Engineer to become part of our dynamic team. This position is available to candidates who can commute (generally within a 2-hour radius) to one of our office hubs in Lisbon. We appreciate flexibility in work arrangements and value the importance of in-person interactions for collaboration and connection. Expect a remote-first work model complemented by periodic office gatherings for team planning and engagement. At Tripadvisor, our engineers thrive on tackling a diverse array of technical challenges. This backend-focused full-stack role primarily involves backend development, with opportunities to engage in frontend projects as well. While a willingness to learn is essential, expertise in frontend development is not required at the outset, as we offer on-the-job training. Our collaborative environment is designed for productivity, where engineers work closely with product managers and designers throughout the entire software development lifecycle—from design and coding to testing and deployment. Most engineers deploy code to production every few days within our daily release cycle. The technology stack at Tripadvisor includes Java, React, Typescript, GraphQL, Kubernetes, SQL, and NoSQL databases on AWS. While strong proficiency in Java is mandatory, familiarity with the entire stack is not a prerequisite; a passion for learning is what we value most. Why Work with Us? Competitive compensation packages, including base salary, annual bonuses, and more. “Work your way” approach offering flexibility to cater to your lifestyle and needs.
At Thought Machine, we are on a transformative mission to liberate banks from the constraints of outdated technology. Our innovative core and payments technology operates natively in the cloud, laying the groundwork for modern banking solutions. Our ambitious vision demands exceptional talent collaborating to create groundbreaking technology.Having expanded rapidly in recent years, our team now comprises over 550 skilled professionals across our offices in London, New York, Singapore, Sydney, and our newly launched Engineering Hub in Lisbon. With over £500 million in funding, our esteemed investors include Molten Ventures, Eurazeo, Intesa Sanpaolo, Temasek, Nyca Partners, JPMorgan Chase Strategic Investments, and Standard Chartered Ventures.We pride ourselves on nurturing a culture that fosters excellence and enjoyment, with frequent accolades for our vibrant workplace environment. Recognized by Sifted magazine for having one of the highest Glassdoor ratings among UK fintech companies, we also offer one of the industry's most generous employee share packages. Our innovative spirit has earned us a spot on Global Finance Magazine's list of the world's most innovative fintechs and recognition from the Financial Times as one of Europe's fastest-growing companies for two consecutive years.As we continue to scale, our Software Engineering team plays a crucial role in our success. We strive for engineering excellence, embracing best practices and modern technologies to drive our mission forward.As a Senior Software Engineer, you will tackle complex challenges across the technology stack, developing high-quality, scalable, secure, and performant code that enhances user experience. You will take full ownership of requirements, translating them into engineering designs, task breakdowns, and implementations, while creating both backend services and engaging frontend experiences.Our diverse clientele ranges from major global financial institutions to regional banks, requiring our systems to be adaptable and customizable for varying user needs. As a bridge between back-end and front-end development, you will craft seamless experiences that captivate our clients.
Join Dashlane as a Junior Backend Software Engineer and embark on a journey to enhance user security and experience. In this role, you will collaborate with seasoned engineers to design and develop backend solutions that power our innovative password management platform.As a key member of our engineering team, you will engage in coding, debugging, and testing applications while contributing to architecture discussions. This is an excellent opportunity for those eager to learn and grow in a supportive environment.
Location: LisbonCompany: aghanim About the Role aghamim is seeking an AI Solutions Engineer with a focus on multi-agent Large Language Model (LLM) systems. This position centers on designing and building agent-based solutions that interact with internal APIs and product workflows. The work goes beyond coding: a strong grasp of user needs and system reliability is essential. This role blends systems engineering and architecture, setting it apart from typical machine learning jobs. Expect to explore APIs and workflows independently, developing agent-driven integrations that fit seamlessly into the platform. Platform Context The product platform exposes many internal APIs. Agents interact directly with these APIs and product workflows. Use cases and workflows are diverse. Agents operate on small data volumes but require complex orchestration. Autonomous operation is key: agents must use tools, routing, memory, and fallback strategies effectively. Backend is primarily Python; frontend uses TypeScript. Main Responsibilities Agent Architecture and System Design Design and implement multi-agent systems, including orchestrator and worker agents. Define agent architecture, focusing on routing, memory, tool usage, and fallback strategies. Translate product requirements into scalable, reliable agent workflows. Ensure systems are maintainable, extensible, and robust. Agent Infrastructure and Development Build core infrastructure for agent execution, including tool calling and state management. Develop and maintain multimodal pipelines for text and image generation. Integrate and abstract model providers such as OpenAI, Anthropic, and self-hosted models. Implement custom tools and services to extend agent capabilities. Platform Integration Connect agents with internal platform APIs and product workflows.
Join the dynamic team at Fundraisr as a Junior Full-Stack Software Engineer in Lisbon! This pivotal role aims to enhance our modular, service-oriented architecture while scaling a platform that has impressively achieved $1M ARR.Your mission will be to transition our platform to a high-performance, enterprise-grade ecosystem that streamlines the fundraising lifecycle through the power of automation and AI.Key Responsibilities:Develop and refine our React 18 Single-Page Application using TypeScript and Vite to ensure efficient production builds.Oversee backend logic with Node.js Vercel Serverless Functions and design the database API layer utilizing Supabase and PostgreSQL.Integrate features leveraging OpenAI and Anthropic APIs for campaign classification and personalized outreach generation.Facilitate bi-directional synchronization with SmartLeads, and create OAuth infrastructures for Google and Microsoft integrations.Implement Row-Level Security (RLS) for multi-tenant isolation and prepare our infrastructure for GDPR compliance and SOC 2 certification.
Join Dashlane as a Backend Software Engineer and be part of a dynamic team dedicated to enhancing digital security for our users worldwide. In this role, you will design, develop, and maintain scalable backend systems that support our innovative applications. Your contributions will directly impact the user experience and the overall success of our products.
Join our dynamic team at inetum2 as a Software Test Engineer. In this role, you will play a crucial part in ensuring the quality and performance of our software products. You will collaborate with cross-functional teams to identify and resolve software issues, implement testing protocols, and contribute to the overall improvement of our development processes.
SingleStore is offering a paid, 12-week Software Engineer Internship in Lisbon, Portugal for Summer 2026. This program places interns within the Engine group, where hands-on learning and mentorship from experienced engineers are central. The internship is designed to help students develop technical skills while contributing to meaningful projects. What you will do Join a small, collaborative engineering team focused on improving SingleStore’s database engine Work on projects that span the full product life cycle, from design and coding to testing and deployment Explore technologies such as large language models (LLM) and vector indexing Enhance the fault tolerance of SingleStore clusters Optimize SQL query performance using methods like SIMD and LLVM code generation Develop modules for query optimization, including search and costing components Write and test software, gaining exposure to both technical and business aspects Interns can expect support from engineers who value mentorship and professional growth. There are also opportunities to learn about other business areas, including product, marketing, and sales. Teamwork and celebrating shared successes are part of the culture, with group meals and outings in and around Lisbon. Requirements Currently enrolled in a Bachelor’s program in Computer Science, Computer Engineering, Electrical Engineering, or a related field Strong understanding of computer science fundamentals Proficiency in C++ or C Interest in building reliable software Solid grasp of algorithms and data structures Preferred experience Previous internship in software development
inetum2 is seeking a passionate and detail-oriented Software Test Engineer - Automation to join our innovative team in Lisbon. In this role, you will be responsible for developing and executing automated test scripts, ensuring high-quality software delivery, and contributing to the continuous improvement of our testing processes.You will work closely with developers and product managers to understand requirements, design test cases, and document results. Your expertise in automation tools and testing methodologies will be crucial in identifying defects and enhancing product performance.
Join SingleStore as a Senior/Principal Software Engineer and contribute to our mission of revolutionizing data management. As a key player in our engineering team, you will work on cutting-edge technologies and be instrumental in developing innovative solutions that empower our clients to manage their data efficiently.
Join Cross Border Talents as a Senior Software Engineer and be part of an exciting transformation in the banking sector for our client in Lisbon, Portugal.Are you an innovative and passionate Software Engineer eager to make a significant impact? This is your chance! Join our dynamic team and help shape the future of banking in Lisbon, Portugal! In your role as a Senior Software Engineer, you will: Create robust, scalable solutions that propel our projects forward. Engage in close collaboration with product owners, business analysts, quality assurance teams, and fellow engineers. Seamlessly integrate UI components with APIs and databases to ensure a stellar user experience. Contribute to agile ceremonies promoting teamwork and continuous improvement. Partner with technology leads to design maintainable, resilient systems tailored to our project requirements.
About UsAt Supermodular AI, we empower organizations to successfully navigate the complexities of AI Transformation. Our philosophy centers on actionable strategies that yield tangible results.While many companies recognize the transformative potential of AI, they often find it challenging to implement this technology into their existing operations. The real obstacles typically lie not in the technology itself but in the integration of AI within long-standing processes and systems. We believe that true transformation is achieved not just through strategic documentation, but through the actual development, deployment, and management of AI systems in real-world environments.We collaborate closely with enterprise IT and software development teams to design and implement robust AI systems tailored to their unique challenges. This partnership enables engineering teams to innovate and adopt AI-native development methodologies that fundamentally alter the way they create and operate software. Additionally, we specialize in constructing custom AI solutions that overcome modernization hurdles where conventional approaches have faltered.Our team boasts a proven history of developing impactful AI systems and scaling engineering teams within complex enterprises. If you thrive on tackling challenging enterprise issues and are excited about transforming ambitious concepts into operational systems, Supermodular AI is the right place for you.Your ResponsibilitiesAs a Forward Deployed Security Engineer (AI Systems) at Supermodular AI, you will collaborate with enterprise IT and software teams to ensure the secure, reliable, and safe operation of AI systems in production settings.You will be integrated within real enterprise environments, partnering with engineers and technical leaders to assess current system operations, identify weaknesses, and understand how AI can impact the risk landscape.Your responsibilities will involve navigating complex and often imperfect system architectures, pinpointing vulnerabilities, creating secure frameworks, and fortifying systems that may not have been initially designed with AI considerations in mind.Your engagement will encompass the complete lifecycle of projects. You will contribute to early-stage technical strategies, embed security and reliability into system designs, and implement necessary safeguards to ensure systems function effectively under real-world conditions.Many of the environments you will encounter may lack cleanliness and completeness; systems could be poorly integrated or designed without security in focus. Your mission will be to introduce structure and resilience to these settings by building and securing systems capable of safe operation in challenging circumstances.
Join Dashlane as a Junior Frontend Software Engineer, where you'll play a vital role in creating seamless user experiences. You will collaborate with a dynamic team of developers and designers to build innovative web applications that delight users. If you're passionate about frontend technologies and eager to learn in a fast-paced environment, this is the perfect opportunity for you.
lastminute.com is looking for a Software Engineer in Lisbon to focus on ETL processes and microservices development. This role supports the company’s travel and leisure platform as it continues to grow. Key responsibilities Design and implement scalable ETL pipelines for efficient data processing and transformation Develop and maintain microservices that power essential platform features Collaborate with team members to enhance service delivery and boost system performance Help optimize existing data workflows and improve service integrations Team and impact The engineering team works together to deliver dependable solutions used by millions of travelers. Efforts in this position will streamline data handling and support new features across the platform.
Role Overview Trustly is looking for a Senior Software Engineer in Lisbon, Portugal. This role focuses on building and improving payment solutions that help make online transactions smoother and more secure. The team values collaboration and creative problem-solving while working to extend the platform’s features.
Role Overview Speechify is hiring an iOS Core Product Software Engineer in Lisbon, Portugal. This role focuses on building and improving our core iOS product. The work centers on delivering strong user experiences and advancing the app’s capabilities. What You Will Do Design, build, and maintain features for the iOS platform Collaborate closely with product, design, and engineering teams Contribute to high-quality software solutions that shape the core Speechify experience Location This position is based in Lisbon, Portugal.
At Arkadium, we believe in the joy of creating fun experiences, and for the past 20 years, we have done just that. As the creators of some of the world’s most-played games, including the iconic Solitaire that has graced countless Windows machines, our games are available on Arkadium.com, iOS, Android, and numerous prominent platforms worldwide.As a proud Evergreen business, our core values of Fierce Drive, Positive Energy, and Living Full Lives guide our operations and decisions.We are a privately held company (ensuring stability and a balanced approach to growth), founder-led (demonstrating passion for our craft), and we consistently earn accolades as a “Best Place to Work” – we are not your average gaming company.Recognized by 'Happiness Works' in 2023, 2024, and 2025 in Portugal, alongside 'Crain's Best Places to Work 2022' and 'Great Place to Work 2022 and 2023' in New York, we take pride in our culture!If you're excited about becoming an Arkadian, we would love to hear from you!OverviewArkadium is on the lookout for an outstanding and seasoned Senior Full-Stack Engineer to join our Core Tech team.Our Core Tech team operates with a backend-first philosophy, developing and refining shared services that power essential functionalities in Arkadium’s games and platforms. This includes authentication, chat, tournaments, friend systems, inventory management, microtransactions, and multiplayer infrastructure (Nakama) among other platform-wide capabilities.What You’ll DoLead the technical direction and delivery of complex, scalable full-stack systems utilized by live games.Design and make architectural decisions for backend and frontend systems, striking a balance between performance, scalability, and long-term maintainability.Develop and enhance backend services and APIs that support real-time, live-operated games.Seamlessly integrate backend systems with web-based frontends and browser games.Empower internal game teams by creating shared services, frameworks, and developer tools.Design, implement, and maintain reliable data models focusing on accuracy, security, and high performance.Identify performance bottlenecks throughout the stack and proactively initiate optimizations.Establish and uphold security standards for authentication, authorization, and data protection.Set engineering quality benchmarks through code reviews, architectural guidance, and mentoring.Create clear technical documentation and decision records to facilitate long-term ownership and knowledge transfer.Stay updated with modern backend, frontend, and infrastructure practices while continuously raising the technical standards of the team.Collaborate closely in an agile environment, contributing to planning, execution, and ongoing improvements.
SingleStore is hiring a Software Engineer Intern to join the Helios team in Lisbon, Portugal for Summer 2026. This is a paid, 12-week internship designed to provide hands-on experience with real-time technologies that support business operations around the globe. Internship Experience Interns at SingleStore work side by side with engineering teams, contributing directly to projects that move quickly from concept to production. Each intern takes ownership of a project, following it through the full product lifecycle. Throughout the program, experienced engineers provide mentorship and share both technical and business insights. Collaboration extends beyond engineering, with opportunities to work with product, marketing, and sales teams. Achievements are celebrated together, both in the office and at events across Lisbon. What you will do Join small teams to develop and test new product features Deploy code to production incrementally during the internship Experience the full software development process from start to finish Build a broad understanding of SingleStore’s products and business Requirements Currently enrolled in a Bachelor’s program in Computer Science, Electrical Engineering, Computer Engineering, or a related field Strong foundation in computer science fundamentals Proficiency in at least one programming language: JavaScript, Golang, or TypeScript Interest in creating highly reliable software Solid understanding of algorithms and data structures Preferred experience Familiarity with operating systems, distributed systems, concurrency, multithreading, or server architectures
