Full-stack Engineer (Java/Kotlin) - Payments Team

Brainlab is seeking a talented Full Stack Software Engineer to join our dynamic team in Munich. This role involves designing and developing innovative software solutions that enhance our healthcare technology. As a Full Stack Engineer, you will work collaboratively with cross-functional teams to deliver high-quality applications that meet the evolving needs of our clients.

As a Senior Full-Stack Engineer at causaprima, you will be instrumental in developing the interactive surfaces that facilitate user engagement with our AI agents. This includes creating dynamic dashboards, approval workflows, real-time visualizations, and a user-friendly counterparty portal designed to seamlessly integrate new companies into our network.Your ResponsibilitiesReal-Time Communication Infrastructure — Implement WebSocket-based event streaming, manage agent notification systems, and handle dynamic queries.Cash Flow Forecasting Visualizations — Develop probabilistic forecasting tools with uncertainty bands, allowing users to drill down into invoice details and underlying assumptions.Counterparty Portal Development — Create a lightweight portal for suppliers and customers to track invoice statuses, manage disputes, and view payment commitments through secure access links.User Approval Interface — Design a human-in-the-loop interface for reviewing agent reasoning and source documents prior to approval actions.Session Management & Authentication — Integrate OAuth 2.0 / OIDC, manage JWTs with tenant context, and oversee session lifecycles backed by Redis, including issuing magic link tokens for the counterparty portal.API / BFF Layer Development — Build a TypeScript service layer that acts as a mediator between the React frontend and the Python agent backend, ensuring tenant-scoped security through REST, GraphQL, and WebSocket endpoints.MCP Server Integration — Develop a Model Context Protocol endpoint for external AI agent integration, facilitating agent-to-agent interoperability across the supply chain.

Join Brainlab as a (Senior) Full-Stack Software Engineer, where you will play a pivotal role in developing innovative healthcare applications that improve patient outcomes. We are looking for passionate engineers with a strong background in both front-end and back-end technologies to help us transform the healthcare landscape.

Join Mercura as a Full-Stack EngineerAt Mercura, we are at the forefront of integrating AI into the core of our economy. With strong backing from Y Combinator, we have successfully raised significant funding, achieving one of the highest valuations in our cohort. As a rapidly growing startup, we reached an impressive $2M in ARR in our first year and are on a mission to hit $10M ARR by the end of 2026.Our co-founder, Lukas, comes from a family with over 115 years in the construction industry, providing him firsthand insight into the challenges of slow and manual quoting processes.In this age of AI, we embark on a mission to enhance human expertise and empower workers in vital industries. Our vision is to revolutionize how businesses operate, making them more efficient and effective.Your RoleAs a Full-Stack Engineer, you will be instrumental in developing robust AI systems. This role demands a proactive engineer with a strong technical foundation and a founder's mindset. We're looking for experienced professionals who excel in delivering innovative web applications.If you’re a passionate innovator who thrives at the intersection of full-stack development and AI, this is your chance to collaborate with a team of exceptional engineers and redefine user interaction with AI.Key ResponsibilitiesCore Engineering: Design and create high-performance systems that support Mercura’s AI products, ensuring their reliability and scalability.End-to-End Ownership: Manage features from architecture through implementation to deployment, monitoring, and continuous improvement.Backend & APIs: Build scalable APIs and backend systems that enhance our AI capabilities and facilitate product growth.Product Engineering: Collaborate with users and the product team to transform real-world workflows into actionable product and engineering strategies.Rapid Iteration: Implement enhancements swiftly through agile iteration and practical engineering solutions.AI Integration: Work on LLM engineering and AI system integrations to enrich our product offerings.

Join FlixMobility, a leader in innovative mobility solutions, where technology meets sustainable travel. We offer a dynamic work environment, competitive compensation, and abundant opportunities for professional growth.As a Full-stack Engineer specializing in backend development with Kotlin, you will play a pivotal role in shaping the future of payment systems for eco-friendly and intelligent mobility.You will be part of our Payments Team, integral to our demand division's checkout experience. Your contributions will significantly influence transaction processing speed, payment methods, and overall revenue generation.We are committed to enhancing payment authorization and conversion rates, improving efficiency, and ensuring data accuracy. Furthermore, you will tackle complex engineering challenges while integrating local payment solutions across multiple markets.Our core services are built with Kotlin and Spring Boot, complemented by interfaces developed in TypeScript and React.js. While we maintain some legacy PHP systems, a willingness to engage with these is appreciated.

Role overview hawk seeks a Senior Full Stack Engineer to join the team in Munich. The focus is on building and maintaining web applications that address real client needs. Collaboration with product, design, and engineering colleagues is a key part of daily work. What you will do Design, implement, and maintain web applications with attention to usability and efficiency Work alongside team members from various disciplines to deliver reliable solutions Guide the team in coding, testing, and deployment practices Promote the use of current technologies and frameworks to ensure projects remain scalable and secure What we value Experience working across the full stack, from frontend to backend Ability to mentor others and set high standards for code quality Dedication to building solutions that are both reliable and user-friendly Comfort working in a collaborative, cross-functional environment This Munich-based position offers the opportunity to influence both the team and the products delivered to clients.

Join our innovative team at ebreuninger GmbH & Co. KG as a Senior Full-Stack Software Engineer, focusing on frontend development. We are looking for a talented individual who is passionate about creating seamless user experiences and robust backend systems. Your role will involve designing, developing, and maintaining high-quality software solutions that meet our clients' needs while ensuring optimal performance and scalability.You will collaborate closely with cross-functional teams, including UX/UI designers and product managers, to deliver exceptional products. If you thrive in a dynamic, remote work environment and are excited about the opportunity to influence the future of e-commerce, we want to hear from you!

ABOUT USAt Avelios Medical, our mission is to revolutionize healthcare through innovative software solutions tailored for digital transformation in hospitals and patient care. Our cutting-edge, modular platform streamlines workflows in clinical settings, ensuring that hospitals, doctors, and nurses can deliver optimal care to their patients. As we rapidly expand, we are committed to fostering a diverse team that reflects our belief in the strength of varied perspectives.THE TEAM AND ROLEWe are on the lookout for a Senior Full Stack Engineer (all genders) to join our dynamic development team. In this pivotal role, you will contribute to the creation of advanced software solutions utilized in critical healthcare environments. Your responsibilities will span the product lifecycle, from design and testing to deployment and maintenance of core Avelios services. This hands-on position will allow you to influence both backend and frontend components of our platform.YOUR RESPONSIBILITIESCollaborate with our core development team to engineer comprehensive full-stack solutions for various clinical applications.Design, test, deploy, and maintain scalable and secure Avelios services.Develop extensive software systems for essential healthcare settings.Utilize the latest technologies in backend and frontend development.Implement best practices for clean, efficient, and secure software engineering.Continuously enhance performance, usability, and development processes.YOUR QUALIFICATIONSA degree in Computer Science, Informatics, Business Informatics, or equivalent practical experience.Proficiency in one or more programming languages: Java, C++, React, TypeScript, Swift, or Rust.Proven software development experience; contributions to GitHub are a plus.A strong desire to learn new technologies and contribute across the technology stack.Exceptional problem-solving skills coupled with a proactive mindset.Fluency in German or English.

Join Mercura as a Full-Stack Engineering InternAt Mercura, we are revolutionizing the backbone of our economy with cutting-edge AI software. Supported by Y Combinator, we've successfully secured a significant funding round, achieving one of the highest valuations in our cohort. As one of Europe’s swiftly growing startups, we proudly surpassed $2M in ARR in our inaugural year. Our ambitious target is to reach $10M ARR by the end of 2026.Our co-founder, Lukas, hails from a family deeply rooted in the construction industry for over 115 years. Having experienced the challenges of manual quoting firsthand, he is driven to transform this sector through AI.We are on a heartfelt mission to empower essential industries with AI technology, enhancing human expertise and enabling individuals to focus on what they do best.Your RoleAs a Full-Stack Engineering Intern, you will be integral in developing AI systems from the ground up. This role demands a proactive, hands-on approach, ideal for engineers who possess high agency, strong technical expertise, and a founder-like mindset. We seek innovative builders with a robust product orientation who have successfully launched complex web applications.We expect our interns to meet the same standards as our full-time employees: we only hire those we trust to independently manage projects and who we envision as long-term collaborators.If you are a passionate creator who thrives at the intersection of full-stack development and AI, this is your chance to work alongside some of the most talented engineers and influence user interactions with AI technology.Your ResponsibilitiesCore Engineering: Design and build high-performance, reliable systems that drive Mercura’s AI products while ensuring scalability.End-to-End Ownership: Take full responsibility for features from architecture and implementation through to deployment, monitoring, and refinement.Backend & APIs: Create scalable APIs and backend systems that facilitate the evolution of AI capabilities and product expansion.Product Engineering: Collaborate closely with users and the product team to translate real-world workflows into actionable product and engineering strategies.Rapid Iteration: Engage in quick iterations based on user feedback and analytics to enhance product functionality.

About the RoleJoin our dynamic team at virtuhire as a (Senior) Full Stack Engineer, where you will contribute to the development and enhancement of cutting-edge AI-powered finance tools for enterprises. As a vital member of our founding engineering team, you will significantly influence our platform's evolution, assisting some of the largest companies globally in streamlining their accounting processes.Collaborating closely with our founders, you will transform innovative ideas into seamless, high-performance features that integrate effortlessly into existing customer workflows. Your contributions will fundamentally shape the way finance teams leverage AI automation at scale.Headquartered in Munich, with roots in San Francisco through Y Combinator, we are on an exciting journey to redefine finance management.What You’ll DoDevelop and enhance AI-driven automation tools for invoice processing, ERP integration, and comprehensive accounting workflows.Design scalable, reliable architecture for mission-critical financial operations.Refine and optimize AI models for accuracy, speed, and usability in real-world applications.Create exceptional user experiences through thoughtful UI/UX design using frameworks like React and Node.js.Stay updated on emerging trends in AI, web technologies, ERP solutions, and automation; integrating the best practices into our platform.Troubleshoot complex challenges to ensure our AI workflows operate reliably at scale.

Join our team at Brainlab AG as a Senior Software Engineer specializing in Full-Stack and DevOps, where you'll play a pivotal role in developing cutting-edge medical imaging solutions. We are looking for a dynamic individual who thrives in a collaborative environment and is passionate about leveraging technology to improve patient outcomes.In this role, you'll engage with cross-functional teams to design, implement, and optimize scalable software solutions while ensuring seamless integration with our innovative medical devices. Your expertise will help drive our commitment to excellence in healthcare technology.

Join our dynamic team at NavVis as a Senior Full-Stack Software Engineer, where you will play a pivotal role in shaping innovative software solutions. Utilizing technologies like Java, Spring, TypeScript, and Angular, you will collaborate with cross-functional teams to deliver high-quality applications. This is an opportunity to enhance user experiences and contribute to impactful projects in a hybrid work environment.

Atolls is the world’s largest community-driven shopping platform, active in over 20 markets.We empower millions to make informed spending decisions through discovery, evaluation, and (re-)purchasing by connecting consumers with the ideal brands and retailers.Our team of over 1,000 professionals across 10 countries develops products that are utilized globally every day, where you will have true ownership and see your impact. Ready to shape the shopping experiences that people trust? Join us!About This Role:We are on the lookout for a Senior Full Stack Engineer to join our Admin Experience team in Munich, Germany. Your role at Atolls will be critical in supporting the development of innovative features and products, working across the full stack from database to client layer. As a vital member of our team, you will directly contribute to building and enhancing the digital platforms that our users depend on.Your efforts will play a key role in shaping how millions of consumers engage with our platforms, guiding them towards smart, fair, and rewarding choices.Our Benefits:At Atolls, we prioritize both your professional and personal development. Here’s what you can look forward to:A culture that fosters personal and professional growth, with opportunities for internal mobility.A supportive, open-minded team that welcomes diverse perspectives and innovative ideas.32 days of paid vacation plus your birthday off, allowing you ample time to recharge.A flexible hybrid working model to ensure a balanced work-life experience.Access to a learning budget and internal training programs to facilitate your growth.Mental health coaching to enhance your well-being.Regular global and local gatherings to celebrate achievements and foster connections.The chance to take a sabbatical after three years with the company.A cloud-based setup for flexibility and collaboration regardless of your location.*These benefits are global...

Join Our Innovative TeamAt OpenAI, our Forward Deployed Engineering team collaborates directly with clients to transform pioneering research into scalable production systems. We sit at the nexus of customer engagement and core platform development, ensuring that our solutions not only meet but exceed client expectations.Your OpportunityWe are seeking dynamic, customer-centric software engineers who are passionate about creating tailored software solutions that utilize OpenAI’s cutting-edge APIs to address complex client challenges. As a Forward Deployed Software Engineer (FDSWE), you will partner with clients and fellow OpenAI engineers to design and implement robust solutions that tackle their most pressing issues. Your role will involve conceptualizing abstractions to enhance service delivery speed and quality across all Forward Deployed projects.You will closely collaborate with Sales, Solutions Engineering, Solutions Architects, and Customer Success Managers working on the same accounts. Additionally, you will engage with our Research and Applied Product teams to relay valuable customer insights.This position is based in Munich, utilizing a hybrid work model requiring three days in the office weekly. We offer relocation assistance and anticipate travel of up to 50%.Key ResponsibilitiesWork closely with strategic clients to deeply understand their business hurdles and technical needs.Design, architect, and build full-stack solutions employing an experimental and iterative methodology.Develop comprehensive scopes of work and project timelines for both proof-of-concept initiatives and full-scale deployments.Engage hands-on with clients' technical teams as a trusted advisor, collaborating side-by-side to drive projects to successful completion on their infrastructure.Partner with Product, Research, and Applied teams to ensure exceptional customer experiences, project success, and actionable product feedback.Contribute to internal knowledge repositories, codifying best practices and sharing insights from customer interactions to scale the Forward Deployed Engineering function.Qualifications for SuccessA minimum of 7 years of professional full-stack engineering experience (excluding internships) in relevant roles within tech and product-focused organizations, with a preference for customer-facing experience.Proficient in various programming languages and frameworks, with a robust understanding of both back-end and front-end technologies.Demonstrated ability to lead projects and work effectively within cross-functional teams.Strong communication skills, with an aptitude for translating technical concepts for non-technical stakeholders.

Join Alten as a Full-Stack Java Developer and contribute to innovative projects in a dynamic environment. As part of our team in Munich, you will engage in designing, developing, and implementing software solutions that meet our clients' needs. This role offers an exciting opportunity to work with cutting-edge technologies, collaborate with talented professionals, and drive change in the tech landscape.

About the RoleJoin us as a (Senior) Product Engineer at Virtuhire, where we’re dedicated to revolutionizing enterprise finance with innovative AI-driven tools. As an integral member of our founding engineering team, you will be instrumental in designing and enhancing our platform, assisting leading global companies in streamlining their accounting processes.Collaborate closely with our founders to transform visionary concepts into high-performing, elegant features that integrate effortlessly into our clients’ workflows. Your contributions will significantly shape the experience of finance teams leveraging AI automation on a global scale.Based in Munich, we have strong connections to San Francisco through Y Combinator.Your ResponsibilitiesDevelop and enhance AI-driven automation tools for invoice management, ERP integration, and comprehensive accounting workflows.Design reliable, scalable, and efficient solutions for essential finance operations.Optimize AI models for enhanced accuracy, speed, and usability in practical applications.Deliver outstanding user experiences through thoughtful UI/UX design, utilizing frameworks such as React and Node.js.Stay informed about emerging trends in AI, web technologies, ERP systems, and automation, integrating the best practices into our platform.Diagnose and resolve complex challenges to ensure our AI-enhanced workflows operate reliably at scale.

Join the Vanguard of Europe's Hypersonic Revolution At Hypersonica, we are at the forefront of redefining European defense technology. Our mission is to provide unparalleled speed, resilience, and technological independence, setting new industry benchmarks. We are a select group of highly skilled professionals dedicated to solving complex challenges with agility and precision. As a Ground Software Engineer, you will not just fill a role; you will be part of a dynamic, talent-rich team where your contributions shape our collective trajectory. We believe in hiring exceptional individuals with extensive technical expertise, sound judgment, and the capability to work independently. We prioritize talent over rigid job descriptions. This position addresses a critical business need, but its evolution will be influenced by your unique skills and experiences. If you have accomplished what others deemed unachievable or possess an unconventional skill set, we invite you to connect with us. Your work will play a crucial role in fostering Europe’s technological sovereignty.

Role Overview NavVis GmbH is looking for a Lead Embedded Software Engineer to join the team onsite in Munich. This role focuses on building advanced software for spatial data technology, directly contributing to the next generation of NavVis products.

Join our innovative team at The Exploration Company as a Software Engineer specializing in Mission Control Software. In this role, you will be pivotal in designing, developing, and implementing advanced software solutions that support our space exploration missions. You will collaborate with cross-functional teams to ensure seamless integration of software systems, contributing to the success of our ambitious projects.