Mobile Engineer - Flutter | Madrid

TransPerfect is a renowned organization with a dynamic start-up culture, on the lookout for innovative and entrepreneurial talent like you to become part of our team. We are currently seeking a Mobile Engineer to join our global workforce, responsible for creating exceptional user experiences on both iOS and Android platforms. This full-time hybrid role invi…

As a Stress Engineer at Destinus, you will play a crucial role in revolutionizing the future of aviation by developing mechanical and structural systems for subsonic, supersonic, and hypersonic flight. Your innovative designs will contribute to breakthroughs that redefine global transportation. You will collaborate with multidisciplinary teams to tackle complex engineering challenges and push the boundaries of aerospace technology.At Destinus, we are at the forefront of transforming the defense industry with our advanced Unmanned Aerial Vehicles (UAVs). Our pioneering technologies are tailored to meet the evolving needs of modern defense operations, ensuring unmatched speed, precision, and cost-effectiveness. We partner with government agencies and defense organizations globally to deliver state-of-the-art solutions for critical missions, marking a new era of efficiency and technological dominance. Join us to shape the future of defense through groundbreaking aerospace innovations.

We are seeking a skilled Technical Engineer to join our dynamic team focused on installation works in Madrid. In this role, you will be responsible for overseeing technical specifications, ensuring project compliance, and collaborating with multidisciplinary teams to deliver successful outcomes. Your expertise will contribute significantly to our projects, driving efficiency and innovation.

Welcome to Adyen! At Adyen, we revolutionize the financial technology landscape by providing a comprehensive suite of payment, data, and financial solutions. Our esteemed clients include industry giants like Meta, Uber, H&M, and Microsoft, solidifying our position as the go-to financial technology platform. We are driven by ambition and innovation in every aspect of our work. We believe in fostering a dynamic environment where talented individuals can thrive. Our culture encourages ownership, collaboration, and problem-solving amongst diverse teams facing unique technical challenges. Together, we develop ethical and innovative solutions that empower businesses to achieve their goals efficiently. About Our Financial Products: Adyen is expanding its horizons beyond payments, creating a comprehensive range of embedded financial services tailored for platforms, marketplaces, SaaS businesses, on-demand services, and crowdfunding initiatives. Our mission is to facilitate seamless global management of payments and financial services through cutting-edge API integrations and hosted solutions. Our innovative platform enables businesses to: Execute onboarding, verification, and compliance processes across diverse markets. Manage transactions and expedite payouts and bank transfers in preferred currencies. Provide value-added services such as capital lending and the issuance of payment cards and bank accounts. Our team is dedicated to developing the technology that underpins this unified platform, focusing on various critical areas. Your Role: Develop and maintain our high-performance distributed platform. Contribute to architectural design decisions ensuring our platform's scalability. Mentor and coach junior engineers, fostering a culture of feedback and continuous improvement. Collaborate with a diverse and inclusive team. Launch quickly and iterate frequently, impacting businesses and customers from day one. Identify and enhance platform components for greater robustness and scalability. Work across teams and time zones to drive initiatives, review code, and embrace constructive feedback.

Join Aircall, a unicorn and AI-driven customer communications platform, serving over 22,000 companies globally. We are innovating the way businesses communicate by seamlessly integrating voice, SMS, WhatsApp, and AI into a unified workspace.Our growth stems from a straightforward principle: empower teams to work more efficiently. Our AI Voice Agent automates routine calls, AI Assist enhances post-call tasks, and AI Assist Pro provides real-time support, enabling individuals to excel in their roles. This leads to increased revenue, quicker resolutions, and confident team scalability.With headquarters in Paris and a robust North American presence in Seattle, alongside teams in Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City, we have developed a beloved product and a rapidly expanding business, supported by top-tier investors and driven by swift AI advancements across various product lines.At Aircall, you will be part of a dynamic organization. We are ambitious, focused on product excellence, and committed to execution, ensuring visible impacts, quick decisions, and genuine growth.Our Work Culture: We are deeply customer-focused, data-informed, and dedicated to delivering significant outcomes. We prioritize ownership, ongoing learning, and a thoughtful pace. If you thrive in a collaborative, fast-paced setting where trust and impact are key, you will feel right at home here.Role Overview:As a Senior Backend Software Engineer, you will play a crucial role in designing, developing, deploying, and maintaining essential features that enhance customer value through voice integration.You will be expected to advocate for best practices and provide mentorship within your team and across the engineering department.We are driven by quality, excellence, and agility, and you will contribute to elevating these standards.Utilizing a diverse range of backend technology stacks, tailored to meet specific needs and consistently hosted on AWS, we create resilient services that add value to voice integration and seamlessly connect with our clients' critical business tools such as CRM, Helpdesk, E-Commerce, and more.

Managing expenses shouldn’t be a headache. At Pleo, we’re revolutionizing the way businesses handle spend management by creating solutions that simplify financial processes for both finance teams and employees. Our goal is to empower organizations to 'go beyond' traditional methods.Since our inception 10 years ago, we’ve embraced the philosophy of ‘Pleo’, meaning ‘more than you’d expect’, which has been pivotal to our success.We are currently at a significant juncture in our growth journey; every decision we make affects our more than 40,000 customers, our business, and our collective achievements. We are looking for individuals who take pride in identifying customer needs, transforming complex challenges into straightforward solutions, and respectfully challenging the status quo. With our ambitious goals ahead, we are a dynamic and diverse team of over 850 individuals from more than 100 nationalities, dedicated to shaping the future of business spending.About the RoleWe are seeking a skilled Backend Engineer to join our innovative team at Pleo. In this position, you will play a crucial role in building and scaling our backend systems, engaging in exciting projects as we expand our product and service offerings. If you are passionate about solving intricate technical challenges and thrive in a culture that values transparency, collaboration, and innovation, we invite you to apply.What You’ll Be DoingAs a Backend Engineer, your responsibilities will include:Designing, building, and maintaining scalable microservices primarily using Kotlin.Collaborating with cross-functional teams to develop innovative solutions across various domains such as Platform, Services, and SMB.Analyzing system performance and implementing optimizations to ensure high reliability and scalability.Participating in code reviews and post-mortems while mentoring fellow engineers.Proactively addressing technical debt and guiding the team through challenges and migrations.What You BringThis role is ideal for you if you possess:Experience in server-side languages, particularly Kotlin, along with expertise in distributed systems, microservices, and cloud environments (e.g., AWS, Kubernetes).Proficiency with relational databases such as PostgreSQL and familiarity with testing frameworks (e.g., JUnit, Testcontainers).

Role overview Nexthink seeks a Senior Data Engineering Tech Lead based in Madrid to shape the company’s data architecture and guide a talented engineering team. This position centers on building and refining data solutions that power Nexthink’s products and enhance the experience for users. What you will do Lead and mentor a team of data engineers, offering technical guidance and day-to-day support. Direct the design and deployment of data pipelines and analytics systems. Collaborate with teams throughout Nexthink to uphold data integrity, improve system performance, and ensure platforms can scale effectively. Tackle complex data problems and contribute to the ongoing evolution of Nexthink’s platform.

About HappyRobotHappyRobot is revolutionizing the real economy with its AI-native operating system that seamlessly connects intelligence to action. Our innovative platform integrates real-time data, specialized AI agents, and orchestrated intelligence to empower enterprises in managing complex, mission-critical operations autonomously.Our AI OS enhances knowledge, optimizes processes at every level, and continuously evolves. We are initially focusing on supply chain and industrial-scale operations, where resilience, speed, and ongoing improvement are paramount, allowing humans to concentrate on strategic and creative endeavors.Discover our vision in our Manifesto. HappyRobot has successfully raised $62M, including a recent $44M Series B funding round in September 2025, with backing from prestigious investors such as Y Combinator (YC), Andreessen Horowitz (a16z), and Base10, who share our commitment to transforming enterprise operations. We are dedicated to assembling a top-tier team of individuals driven by determination, exceptional problem-solving abilities, and a passion for pushing boundaries in a dynamic, high-intensity environment. If this resonates with you, we invite you to join us at HappyRobot.Role OverviewWe are seeking a highly skilled and adaptable Forward Deployed Engineer to become an integral part of our team. This role requires a unique blend of strong technical expertise and outstanding communication skills, as you will work directly with customers to maximize their utilization of HappyRobot's AI platform. Your responsibilities will encompass onboarding, implementation, ongoing support, and contributing to product development and innovation.At HappyRobot, we embrace a non-hierarchical structure, operating collaboratively as a team of builders. We execute, we create, we take ownership, and we are deeply invested in our customers' success.What You’ll DoCustomer-Facing Engineering – Collaborate closely with customers throughout their onboarding and ongoing usage to help them effectively integrate and optimize our AI solutions.Technical Development – Create new features, MVPs, and scalable solutions that directly enhance customer outcomes.Full-Stack Development – Leverage technologies such as React, TypeScript, Node.js, and Python to build robust applications and tools.AI/ML Applications – Design, implement, and refine AI/ML solutions, including LLM prompting, voice tuning, and transcription tools to optimize various use cases.

Role overview airapps is looking for a Product Analyst in Madrid. This role centers on using data to help shape and improve digital products. The Product Analyst works closely with teams across the company, turning data into insights that guide product decisions and development. What you will do Analyze product data to identify trends and opportunities for improvement Collaborate with colleagues from different departments to understand business needs Translate data findings into clear, actionable recommendations Support ongoing product innovation with evidence-based insights Location This position is based in Madrid.

Join aircall, a leading AI-driven customer communication platform, as we innovate the way businesses interact with their customers. With over 22,000 companies relying on our services, we integrate voice, SMS, WhatsApp, and AI into a unified workspace designed to enhance efficiency and drive revenue.Our vision is simple yet powerful: empower teams to work smarter, not harder. With tools like our AI Voice Agent for automating routine calls and AI Assist Pro for real-time guidance, we ensure that our teams can achieve peak performance and fast resolutions.Headquartered in Paris, with a strong presence in North America and multiple offices including Madrid, London, and New York City, aircall is backed by top-tier investors and is rapidly evolving through AI innovation across various product lines.At aircall, you will be part of a dynamic and ambitious team focused on impactful results. We prioritize ownership, continuous learning, and agile practices. If you thrive in a collaborative and fast-paced environment, you will flourish here.We are seeking a dedicated and enthusiastic Senior Software Engineer to enhance our engineering department and contribute to our innovative projects.In this role, you will oversee the design, development, deployment, and maintenance of essential features that deliver significant value to our customers. You will champion operational excellence and best practices while mentoring your team and the wider engineering community.Your work will focus on elevating quality, excellence, and agility within our delivery processes. You will work primarily with NodeJS and Typescript, ensuring our solutions are effectively hosted on AWS.

Note: Only candidates located in Spain will be considered. Visa sponsorship is not available. Lynx Financial Crime Tech S.A develops AI-driven systems to detect and predict behavioral patterns in financial transactions. The team draws on backgrounds in both finance and academia, focusing on self-learning tools that support low-latency processing for clients in banking, fintech, and commercial sectors. Their solutions work across on-premises and cloud environments. The company values vision, agility, and speed, aiming to build trust with customers and encourage proactive risk management. Lynx supports diversity and equal opportunity, welcoming people from all backgrounds. Role overview This Madrid-based Software Engineer (Python) position centers on building and maintaining an AI-powered anti-money laundering (AML) tool. The platform relies on Big Data and real-time processing to deliver self-learning solutions for the financial sector. Main responsibilities Analyze requirements and contribute to solution design. Develop and maintain a cloud application for AML detection in financial environments. Assess system performance and identify areas for speed improvements. Conduct quality assurance testing to validate new features and changes. Create and manage test cases. Diagnose and resolve software issues. Promote best practices in the use of development repositories and tools.

About the Role airapps is looking for a Backend Engineer in Madrid to help shape the systems behind our platforms. This role centers on building and improving backend architecture that supports our applications. What You Will Do Design, implement, and maintain scalable backend systems Work closely with teams across the company to deliver new features and solutions Contribute to the ongoing improvement of our backend platforms Location This position is based in Madrid.

Join our dynamic team at T-Systems Iberia as a DevOps Engineer. In this full-time position, you will play a crucial role in optimizing our development and operations processes, ensuring seamless integration and delivery of software solutions. Your expertise will help us maintain high standards of reliability and performance in our systems.

Join T-Systems Iberia as a System Engineer where you will play a crucial role in designing, implementing, and maintaining complex systems and infrastructure. You will collaborate with cross-functional teams to deliver high-quality solutions that meet our clients' needs.

Join our dynamic team at Aircall as a Senior Frontend Engineer in our Madrid office! We are searching for a talented engineer who is passionate about building high-quality, scalable web applications. In this role, you will collaborate with cross-functional teams to deliver exceptional user experiences and contribute to our innovative product development efforts.

Role overview Nexthink is looking for a Senior Site Reliability Engineer in Madrid to help strengthen the reliability and performance of our systems. This role works closely with engineering teams to build and support scalable infrastructure. Automation and process improvement are key parts of the work, all aimed at delivering a smooth user experience.

Join our dynamic team at Bursonglobalcareers as a Paid Specialist in Madrid! This is an exciting opportunity for individuals passionate about enhancing their skills in a vibrant work environment. As a Paid Specialist, you will be responsible for supporting various projects, collaborating with team members, and contributing to our mission of delivering exceptional results for our clients.

Role overview AECOM is hiring a Senior Electrical Engineer in Madrid to work on data center projects. The role centers on designing, developing, and implementing electrical systems that keep data centers reliable and efficient. What you will do Design and develop electrical solutions for data center facilities Lead projects from the initial concept stage through completion Collaborate with multidisciplinary teams to deliver projects on schedule Support improvements in energy efficiency and performance across data center operations Ensure engineering solutions align with client needs and meet quality standards Requirements Extensive experience in electrical engineering, preferably with data center projects Strong collaboration skills and a commitment to delivering high-quality work Ability to manage multiple projects and coordinate with cross-functional teams This position offers the chance to play a central role in shaping AECOM's data center infrastructure projects.

Hello! We are Fever, a leading technology platform revolutionizing the world of culture and live entertainment.Our mission is to democratize access to culture and entertainment. With our innovative technology and data-centric approach, we are transforming how people engage with live events. Each month, over 300 million users across more than 40 countries discover unforgettable experiences on our platform, while we empower event creators with insights and tools to scale and innovate their offerings.Our achievements are notable: we have partnered with industry giants like Netflix, F.C. Barcelona, and Primavera Sound, delivered award-winning experiences, and secured backing from top global investors!To fulfill our mission, we seek ambitious individuals with a proactive attitude who are ready to help shape the future of entertainment! Are you ready to join us?Now, let’s delve into this role and your contributions to Fever’s mission.About the TeamThe Growth team is responsible for executing Fever’s business strategy across all markets and ensuring our partners achieve their potential, facilitating their growth within Fever.

Role Overview Vonage seeks a Java Software Engineer for its Cloud Engineering team in Madrid, Spain. This group develops and maintains the Vonage Video Platform, focusing on backend systems that support cloud communications for businesses worldwide. What You Will Do Design and implement new features for the Vonage Video Platform. Improve and maintain backend systems, with attention to quality, fault tolerance, and performance. Optimize cloud resource management to support scalable and distributed computing solutions. Work with real-time communications technologies. Use data analytics to inform service development and scalability improvements. What Sets This Team Apart Work alongside experienced engineers who specialize in cloud infrastructure, media technologies, and real-time communication. The team values hands-on problem solving and a commitment to building large-scale, highly available systems.