Senior Full-Stack Engineer (Berlin)

We are looking for a Senior Full-Stack Engineer who will take ownership of crucial engineering activities at Kadmos. As a regulated salary payment provider in the shipping industry, we are building secure, reliable, and scalable financial solutions that empower seafarers and shipping companies worldwide. You will play a central role in shaping both the backend infrastructure and frontend experience of our platform, driving innovation in a highly regulated environment.

What you can expect

• Own the full stack . You will be responsible for developing and maintaining core backend systems and frontend applications, building reusable libraries, implementing complex financial components, and integrating with external service providers.
• Work with independence . You’ll be trusted to take full ownership of your responsibilities, while collaborating closely with product, compliance, and engineering teams.
• Impact at scale . You will contribute directly to a platform serving the global shipping industry, with the opportunity to design systems that handle secure financial transactions and deliver exceptional user experiences.
• Collaborative environment. We value diversity, transparency, and teamwork. You’ll join an open and supportive culture where everyone’s input matters.

What you bring along

• 5+ years of professional experience in full-stack development with Java Spring Boot and React .
• Master’s degree in Computer Science, Mathematics, or Physics.
• Backend Proficiency : Expertise in Java with strong knowledge of Spring Boot and modern frameworks, SDKs, API standards, and libraries.
• Frontend Proficiency : Expertise in React with a strong emphasis on TypeScript. Experience with Redux, React Query, styled-components, MUI Component Library, or similar tech stack.
• Extensive hands-on experience in developing scalable and testable high-quality solutions in an agile environment.
• Solid experience with unit, integration, and performance testing (JUnit, Spock, Testcontainers on the backend; React Testing Library and Cypress on the frontend).
• Strong understanding of building secure, reliable, and scalable systems, ideally in a regulated or financial services context.
• Proactive, ambitious, and collaborative mindset with a track record of delivering high‑quality solutions.
• Fluency in English.

Why us

• Opportunity to work in a company with direct social impact
• ️ Fantastic location in the heart of Berlin & flexible WFH policy