Senior Full-Stack Engineer (Berlin)

<div class="content-intro"><div class="layout__FormFieldContainer-sc-1wgrxjv-0 fhJjya post_details__Field-sc-ier52u-0 hVDruQ" data-provides="description_introduction"> <div class="components__JobPostDescription-sc-1qa03o2-13 bjOjov"> <h3>About the opportunity</h3> </div> </div></div><h1>About the opportunity</h1> <p>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.</p> <h3>What you can expect</h3> <ul> <li><strong>Own the full stack</strong>. 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.</li> <li><strong>Work with independence</strong>. You’ll be trusted to take full ownership of your responsibilities, while collaborating closely with product, compliance, and engineering teams.</li> <li><strong>Impact at scale</strong>. 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.</li> <li><strong>Collaborative environment.</strong> We value diversity, transparency, and teamwork. You’ll join an open and supportive culture where everyone’s input matters.</li> </ul> <h1><strong>What you bring along</strong></h1> <ul> <li><strong>5+ years of professional experience</strong> in full-stack development with <strong>Java</strong> Spring Boot and <strong>React</strong>.</li> <li>Master’s degree in Computer Science, Mathematics, or Physics.</li> <li><strong>Backend Proficiency</strong>: Expertise in Java with strong knowledge of Spring Boot and modern frameworks, SDKs, API standards, and libraries.</li> <li><strong>Frontend Proficiency</strong>: Expertise in React with a strong emphasis on TypeScript. Experience with Redux, React Query, styled-components, MUI Component Library, or similar tech stack.</li> <li>Extensive hands-on experience in developing <strong>scalable and testable high-quality solutions</strong> in an agile environment.</li> <li>Solid experience with <strong>unit, integration, and performance testing</strong> (JUnit, Spock, Testcontainers on the backend; React Testing Library and Cypress on the frontend).</li> <li>Strong understanding of building secure, reliable, and scalable systems, ideally in a regulated or financial services context.</li> <li>Proactive, ambitious, and collaborative mindset with a track record of delivering high-quality solutions.</li> <li>Fluency in English.</li> </ul> <h1>Why us</h1> <ul> <li>🌱 Opportunity to work in a company with direct social impact</li> <li>💰 Attractive compensation</li> <li>🇺🇦 Open &amp; International environment</li> <li>🏛️ Fantastic location in the heart of Berlin &amp; flexible WFH policy</li> <li>🥘 Free lunch at the office</li> <li>💻 Latest equipment, to ensure you have everything needed</li> </ul><div class="content-conclusion"><h3>About the company</h3> <p><em>Kadmos is on an ambitious mission to revolutionise&nbsp;salary payments to migrant workers. The Berlin-based startup was founded in 2021 by MIT graduates Justus Schmueser and Sasha Makarovych to bring fintech, low margins, and transparent FX to industries riddled with opaque mark-ups, kickbacks, and physical cash transactions.</em></p> <p><em>Backed by renowned VCs Addition and Atlantic Labs, Kadmos has raised more than $39 million since 2021. The company intends to use the funding for expanding across industries and further accelerating product development. For more information, visit <a href="https://www.kadmos.io/">https://www.kadmos.io/</a></em></p></div>