Ai Application Engineer I jobs in Lisbon – Browse 375 openings on RoboApply Jobs

Ai Application Engineer I jobs in Lisbon

Open roles matching “Ai Application Engineer I” with location signals for Lisbon. 375 active listings on RoboApply Jobs.

375 jobs found

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Mollie logo
Full-time|On-site|Lisbon

Your OpportunityAt Mollie, we are dedicated to revolutionizing payments and money management for businesses across Europe. Our vision is to empower every business by simplifying financial transactions and operations.Currently, we support over 250,000 businesses with our comprehensive solution, which streamlines payment processes and enhances financial manage…

Apr 30, 2026
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Mollie logo
Full-time|On-site|Lisbon

About Mollie Mollie’s mission is to make payments and money management simpler for businesses across Europe. Founded nearly 20 years ago, Mollie began by offering a straightforward, affordable alternative to traditional banking. Today, the company supports over 250,000 businesses with a comprehensive platform for payment processing and financial management. The team includes 850 professionals working in areas like product development, finance, customer support, commerce, and engineering, with offices from Lisbon to London. Role Overview: Application Engineer I (Lisbon) This role focuses on building and improving systems that drive Mollie’s products and services. Application Engineers at Mollie work closely with data, infrastructure, and product teams to create solutions that help customers manage payments and financial operations more efficiently. Main Responsibilities Design scalable systems: Architect and implement large-scale, data-driven systems for real-time monitoring, predictive analytics, fraud detection, and payment optimization. ML and AI infrastructure: Develop and maintain infrastructure to deploy and operate machine learning and AI models, supporting tasks like fraud detection and smart routing with high reliability. Product development: Build new features across Mollie’s products, such as payment method benchmarking, dynamic 3D Secure, and buyer intelligence, using data to create value. API and service design: Create and manage APIs and reusable services that help customers and internal teams make decisions and act quickly. Technical ownership: Lead technical projects from concept to delivery, upholding strong engineering standards throughout. Problem solving: Address complex challenges like anomaly detection and transforming transactional data into actionable insights, making financial processes smoother. What We’re Looking For Proactive mindset: Focus on delivering ongoing value to customers, balancing speed with quality. At least 2 years of experience developing large-scale applications, ideally with PHP or Java. Familiarity with Go, C#, or Python is a plus. Willingness to work in PHP or Java is important. Solid understanding of system design and architecture.

Apr 17, 2026
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Altersolutions logo
Full-time|On-site|Lisbon

Join Altersolutions as an Application Support Engineer / Application Manager in the vibrant city of Lisbon! We are seeking a passionate individual who thrives in fast-paced environments and is eager to make a significant impact on our operations. As part of our team, you will be responsible for providing exceptional support to our applications, ensuring they run smoothly and efficiently.

Aug 6, 2024
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ValGenesis logo
Full-time|Hybrid|Lisbon

Join ValGenesis, a pioneering provider of digital validation solutions for the life sciences sector. Our innovative suite of products empowers 30 of the top 50 global pharmaceutical and biotech enterprises to achieve seamless digital transformation, ensuring total compliance and operational excellence throughout their product lifecycle. Discover the unique culture at ValGenesis, the gold standard for paperless validation in Life Sciences: Learn MoreAs an Application Engineer - Tier 1 at ValGenesis, you will hone your technical support skills while engaging in software troubleshooting and delivering exceptional customer service. In this role, you will tackle moderately complex software challenges, mentor junior application engineers, and collaborate with internal teams for system enhancements. This position is ideal for individuals seeking to deepen their problem-solving expertise and contribute to impactful technical projects.We offer a hybrid work schedule of 4 days per week, providing flexibility while fostering in-person collaboration at our Lisbon office. We believe that face-to-face interactions stimulate creativity and strengthen our community, which is vital to our continued success.

Jul 11, 2025
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Air Apps logo
Full-time|On-site|Lisbon

Join Our Innovative Team at Air AppsAt Air Apps, we are driven by a vision of innovation and speed. As a family-founded company, our mission is to revolutionize how individuals plan their resources with the world's first AI-powered Personal & Entrepreneurial Resource Planner (PRP). Since our inception in Lisbon, Portugal, in 2018, we have expanded to San Francisco and have achieved over 100 million downloads globally. Our self-funded journey reflects our commitment to crafting solutions that truly impact lives.We constantly challenge conventional methods, leveraging AI-driven technology to create meaningful products that empower users worldwide. Be a part of our quest to redefine resource management and make a difference in people's lives.Your Role as an AI/ML EngineerAs an AI/ML Engineer, you will be instrumental in the design, development, and optimization of machine learning models that enhance our mobile applications. Collaborating closely with product managers, engineers, and designers, you will help create intelligent, data-driven features that elevate user experiences. Your proficiency in artificial intelligence and deep learning will enable us to stay ahead in the competitive mobile app landscape.This posting serves to expand our talent pool as we prepare to officially launch this position. We will reach out once the job is formally posted.Key ResponsibilitiesDevelop, train, and refine machine learning models for various mobile app functionalities.Research and apply cutting-edge AI methodologies to boost user engagement and app performance.Work collaboratively with cross-functional teams to integrate AI-enhanced solutions into our products.Design and maintain robust ML pipelines to ensure effective model deployment and monitoring.Analyze large datasets to extract insights and support data-driven decisions.Stay informed on the latest AI trends and best practices, integrating them into our development workflows.Optimize AI models for mobile environments, ensuring high performance and minimal latency.

Feb 17, 2026
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Mollie logo
Full-time|On-site|Lisbon

Your OpportunityJoin Mollie, where we are dedicated to revolutionizing payments and money management for businesses across Europe.For the past two decades, we have been at the forefront of simplifying payment processes, offering a cost-effective alternative to traditional banking methods.Presently, we empower over 250,000 businesses with our comprehensive solution, enhancing their payment experiences. Our diverse team of 850 professionals spans across various disciplines, from engineering to finance, with a strong presence in cities like Lisbon and London.Our Lisbon Hub:Nestled in the vibrant area of Marques de Pombal, our Lisbon team comprises over 50 engineers representing 8 different nationalities. Together, we focus on delivering an exceptional Merchant Experience through our web and mobile applications, while continuously evolving our Payment Processing and Orchestration Platform to introduce innovative financial products.We cherish our inclusive, English-speaking culture, which fosters collaboration and creativity in addressing financial challenges.What You Will Be Doing:Building Large-Scale Systems: Contribute to the design and engineering of scalable systems that efficiently handle high transaction volumes.API and Service Development: Develop, maintain, and enhance APIs and services across Mollie’s engineering teams.Autonomy and Ownership: Spearhead technical initiatives from architectural design to execution, ensuring excellence is upheld throughout the process.Problem-Solving: Leverage your analytical skills and creativity to tackle complex issues, driving our mission to simplify financial processes.

Aug 4, 2025
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Indicium AI logo
AI Engineer

Indicium AI

Full-time|On-site|Lisbon

About Indicium AI Indicium AI is a premier consultancy trusted by leading global enterprises to implement AI technologies at scale. As a dedicated AI-native consultancy, we possess extensive experience across various sectors including Financial Services, Energy & Utilities, Healthcare & Life Sciences, Retail & CPG, and Manufacturing. From strategic planning to execution and business outcomes, we deliver AI solutions with unparalleled speed, clarity, and effectiveness.Our team comprises over 600 AI specialists serving more than 50 enterprise clients from five global locations. We collaborate closely with top-tier partners such as Anthropic, Databricks, AWS, OpenAI, and Microsoft to provide cutting-edge AI solutions that yield measurable results. Position Overview We are looking for a skilled AI Engineer to design, build, and deploy robust AI systems powered by large language models (LLMs). This role merges software engineering with AI application, emphasizing the development of reliable and scalable applications instead of model training or research.In this position, you will leverage advanced LLM technologies to create sophisticated AI systems that address complex real-world challenges through multi-agent orchestration, intelligent tool integration, and efficient production workflows. Your primary focus will be on developing the orchestration layer that ensures these systems are production-ready, addressing failure modes, optimizing collaboration between agents, and guaranteeing consistent, dependable outputs at scale. You will blend strong software engineering principles with a profound understanding of LLM capabilities, limitations, and best practices for constructing trustworthy non-deterministic systems.

Mar 17, 2026
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Mollie logo
Full-time|On-site|Lisbon

Lead Senior Application EngineerYour OpportunityJoin Mollie on our mission to revolutionize payment processing and financial management for businesses across Europe. With a clientele exceeding 250,000 businesses, we strive to eliminate the financial hurdles that stifle innovation. We believe that managing payments, driving revenue, and accessing capital should be a streamlined experience for our merchants.As a Senior Application Engineer, you will lead the charge in developing cutting-edge financial products that will redefine how businesses handle their finances. As Mollie expands into new markets and manages a growing transaction volume, your contributions will be pivotal in launching innovative products that enhance our service offerings. This is your chance to turn your ideas into reality and shape impactful projects.Your ImpactIn this role, you will be an integral part of the Insights team, which is dedicated to crafting a pioneering customer-facing data product. We are transforming our existing merchant dashboard into a sophisticated, AI-powered analytics suite designed to empower our customers with data-driven insights.Your work will be visible to senior leadership and our clients, with a direct influence on Mollie's revenue by supporting product upsells and attracting premium merchants. This role offers a high degree of ownership and entrepreneurial spirit, allowing you to take concepts from ideation to production swiftly and help develop a crucial data product from the ground up.Our Lisbon Hub:Located in the vibrant heart of Lisbon at Marques de Pombal, our team comprises over 50 engineers from eight diverse nationalities, all working towards Mollie’s goal of providing exceptional Merchant Experiences through our web and mobile applications while scaling our Payment Processing Platform. This enables the launch of innovative payment and financial products.We take pride in our inclusive, English-speaking culture that fosters collaboration in solving financial challenges for our customers.What You'll Be Doing:Designing & Building Scalable Systems: Collaborate with us to design and develop systems capable of handling high transaction volumes.API Development: Develop and maintain robust APIs that facilitate seamless integration for our clients.

Mar 31, 2025
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Hitachi Digital Services logo
AI Engineer

Hitachi Digital Services

Full-time|On-site|Lisbon, Portugal

About Us At Hitachi Digital Services, we are a global leader in digital solutions and transformation, leveraging our extensive engineering expertise and industry insights to modernize, optimize, and manage mission-critical platforms at scale. Join Our Team Our Center for Artificial Intelligence (CAAI) serves as the engineering and architecture hub for AI at HDS. This practitioner-led center is dedicated to realizing Hitachi’s global AI ambitions through repeatable and governed delivery. Our team is responsible for developing reference architectures, reusable components, and evaluation methodologies that can be deployed across various client environments, including cloud and hybrid solutions. Your Role As an AI Engineer, you will design, build, and operate AI capabilities that can be seamlessly integrated into real-world applications. This includes workflows powered by large language models (LLMs), retrieval-augmented generation (RAG), and agent-based systems, all maintained to production standards. Key Responsibilities Develop end-to-end AI solutions, encompassing data preparation, model integration, evaluation, deployment, and operational monitoring. Translate business and delivery requirements into practical AI designs, collaborating closely with architects, platform engineers, and client stakeholders. Create reusable assets, such as reference implementations, patterns, templates, and internal libraries. Adhere to production best practices, including rigorous testing, version control, CI/CD processes, and performance optimization. Deliver high-quality AI components independently, mentor junior team members, and enhance CAAI’s reusable assets. Manage small to mid-sized AI workstreams from conception through to release and operational transition. Engineer RAG and agent-based features with comprehensive evaluation and failure mitigation strategies.

Mar 2, 2026
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inetum2 logo
Full-time|On-site|Lisbon

About the Role inetum2 is hiring an Application Support Engineer focused on Simulation Tools in Lisbon. This position centers on supporting and maintaining simulation applications to keep user experiences smooth and reliable. Main Responsibilities Deliver support for simulation tools, resolving technical issues as they arise Work with teams across the company to troubleshoot and implement solutions Contribute to ongoing improvements in application performance and reliability Location Lisbon

Apr 14, 2026
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Upwork Inc. logo
Lead AI Engineer

Upwork Inc.

On-site|On-site|Lisbon, Portugal

Join Upwork Inc. (Nasdaq: UPWK), a leader in connecting businesses with top-tier global talent empowered by artificial intelligence. As a Senior Lead AI Engineer, you will play a pivotal role in driving innovation and enhancing AI solutions across various work types, including freelance, fractional, and payrolled talent. Our diverse portfolio includes the Upwork Marketplace, which offers businesses immediate access to a vast pool of skilled professionals worldwide, and Lifted, our dedicated platform for enterprise organizations to efficiently source, manage, and compensate talent for all contingent work needs. From Fortune 100 companies to entrepreneurial startups, businesses depend on Upwork Inc. to discover expert talent, utilize AI-driven solutions, and transform their operations. With expertise spanning over 10,000 skills across AI & machine learning, software development, sales & marketing, customer support, finance & accounting, and beyond, we empower businesses of all sizes to scale, innovate, and adapt in the age of AI and beyond.Since our inception, we have successfully facilitated over $30 billion in transactions and services, embodying our mission to create opportunities in every era of work. Explore more about the Upwork Marketplace at Upwork.com and connect with us on LinkedIn, Facebook, Instagram, and TikTok.

Feb 9, 2026
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inetum2 logo
Full-time|On-site|Lisbon

Role Overview Inetum2 is hiring a Senior Application Production Engineer focused on Business Intelligence and Data Management in Lisbon. This position plays a key part in keeping our applications running smoothly and reliably. What You Will Do Monitor and maintain the performance of BI and data applications. Work closely with teams across the company to support and improve data-driven processes. Troubleshoot issues to minimize downtime and ensure service quality. Contribute to ongoing improvements that strengthen our decision-making with better data.

Apr 16, 2026
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Speechify logo
Full-time|Remote|Lisbon, Portugal

About Speechify Speechify builds tools that remove reading barriers and help people learn in new ways. More than 50 million users depend on our text-to-speech products to turn everything from PDFs and books to Google Docs, news articles, and websites into audio. Our platform includes apps for iOS, Android, Mac, Chrome, and the web. We have received recognition from both Google (Chrome Extension of the Year) and Apple (2025 Design Award for Inclusivity), reflecting our focus on accessibility and thoughtful user experience. Our Team Speechify operates as a fully distributed company, with nearly 200 team members working remotely across the globe. Our group includes frontend and backend engineers, AI research scientists, and experienced professionals from Amazon, Microsoft, and Google, as well as alumni of Stanford and fast-moving startups like Stripe and Vercel.

Apr 20, 2026
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Inetum logo
Full-time|On-site|Lisbon

Join our dynamic WM APS (Application Production Support) team, where your expertise will be essential in delivering exceptional Application Support and operational excellence in the banking sector.As an integral member, you will manage incidents, service requests, and application support activities. Your role will involve participating in shift and on-call rotations and actively contributing to service improvement initiatives. You will also engage in the bank’s Disaster Recovery (DR) drills and Live Play activities.The ideal candidate should possess a robust understanding of core banking operations, strong troubleshooting abilities, and hands-on experience in L1/L2 application support. Familiarity with modern infrastructure and automation technologies is a must.Key Responsibilities:Oversee incident management, service requests, and production support activities (L1/L2)Develop and maintain Ansible playbooks and Terraform scripts for automating provisioning, configuration, and deploymentsAssist in the containerization of legacy applicationsSupport provisioning, configuration, deployments, and Disaster Recovery (DR) processesGuide, mentor, and train fellow operations team members in Ansible, Terraform, and KubernetesContribute to service improvement initiatives and enhance operational stability

May 4, 2026
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inetum2 logo
Full-time|On-site|Lisbon

Join inetum2 as a Generative AI Engineer, where you will play a pivotal role in developing cutting-edge AI solutions. In this dynamic position, you will collaborate with multidisciplinary teams to create innovative AI applications that enhance user experiences. If you are passionate about transforming ideas into reality through artificial intelligence, we want to hear from you!

Sep 10, 2025
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Hitachi Digital Services logo
Senior AI Engineer

Hitachi Digital Services

Full-time|On-site|Lisbon, Portugal

About Us Welcome to Hitachi Digital Services, a global leader in digital solutions and transformation. We envision a world filled with potential, driven by innovation and technology. Our mission is to empower positive change by future-proofing urban environments, conserving natural resources, and enhancing lives. Each day, we harness our extensive expertise to transition our clients from the present to a better future. At Hitachi, we value diversity and recognize that your unique life experiences, character, and passion are crucial to our collective success. Join Our Team As part of our global delivery network, Hitachi Digital Services Vietnam collaborates with teams worldwide, including in India, Portugal, and the US. Our workforce is engaged in various projects, from cloud migration to digital modernization. We pride ourselves on our operational excellence and agile delivery as we undertake significant transformation projects for our clients. Your Role In this position, you will design, develop, and manage AI capabilities that are seamlessly integrated into practical applications. This includes LLM-enabled workflows, RAG, and agent-based systems within enterprise platforms, ensuring they meet production standards.

Mar 2, 2026
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Cross Border Talents logo
AI Prompt Engineer

Cross Border Talents

Full-time|On-site|Lisbon, Lisbon, Portugal

Are you ready to shape the future of artificial intelligence?We are in search of a highly skilled and enthusiastic AI Prompt Engineer to join our innovative team. This pivotal role demands a unique combination of technical expertise, analytical prowess, and meticulous attention to detail. The Prompt Engineer will focus on optimizing AI tools, troubleshooting technical challenges, conducting in-depth data analysis, and crafting effective prompts that significantly enhance operational productivity.Key ResponsibilitiesOptimization and Equipment MaintenanceContinuously monitor and maintain AI systems to ensure peak performance.Fine-tune and adjust equipment settings for optimal functionality.Technical Problem SolvingIdentify and rectify errors to elevate overall productivity.Utilize advanced problem-solving techniques to address technical hurdles.Data AnalysisConduct comprehensive data analysis to uncover patterns, trends, and areas for improvement.Communicate findings and recommendations to management for informed decision-making.Prompt Design and DevelopmentAssess organizational needs to create and implement impactful prompts.Leverage prompts to automate repetitive tasks, enhancing operational efficiency.

Jan 30, 2024
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inetum2 logo
Full-time|On-site|Lisbon

Join inetum2 as an Application Support Specialist where you will play a pivotal role in ensuring the smooth operation of our software applications. You will be responsible for troubleshooting issues, providing user support, and collaborating with development teams to improve application performance. Your expertise will help enhance user satisfaction and drive operational efficiency.

Jan 5, 2026
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inetum2 logo
Full-time|On-site|Lisbon

Join inetum2 as an Application Support Engineer specializing in Linux and OpenShift. We are seeking a dedicated professional to support our applications and ensure smooth operations. Your role will involve troubleshooting, system monitoring, and collaborating with cross-functional teams to enhance application performance.

Apr 30, 2026
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Air Apps logo
Full-time|On-site|Lisbon

Join the Air Apps TeamAt Air Apps, we are driven by innovation and the desire to redefine how individuals manage their resources. Founded in 2018 in Lisbon, Portugal, our family-oriented company is on a groundbreaking mission to develop the world's first AI-powered Personal & Entrepreneurial Resource Planner (PRP). With over 100 million downloads globally, we are focused on pushing the boundaries of AI-driven solutions that enhance the way people work, plan, and live.We seek creative minds who are passionate about creating impactful products that empower users worldwide. Be a part of our journey to transform resource management and make a difference in people's lives.Your RoleAs a React Engineer, you will be at the forefront of developing responsive and accessible user interfaces for our web applications. Collaborating with designers, product managers, and backend engineers, you will convert wireframes and prototypes into high-quality, stable, and scalable front-end experiences that will delight our users.This posting is intended to expand our talent pool as we prepare to officially launch this position. We will reach out to you once the job is posted.Key ResponsibilitiesUser Interface Implementation: Create high-quality, responsive user interfaces that adhere to design specifications, ensuring compatibility across various browsers and devices.Frontend Development: Develop and maintain code utilizing modern JavaScript frameworks and libraries (e.g., React, Vue.js, Angular) alongside HTML5, CSS3, and principles of responsive design.Performance Enhancement: Continuously optimize page load times, rendering performance, and overall user experience.API Integration: Work collaboratively with backend teams to integrate RESTful/GraphQL APIs, ensuring seamless data flow between the client and server.Accessibility and SEO Focus: Adhere to best practices for accessibility (WCAG standards) and search engine optimization to enhance user reach.Testing and Code Maintenance: Write unit, integration, and end-to-end tests (e.g., Jest, Cypress) to uphold high-quality standards, and participate in code reviews.

Feb 17, 2026

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