# Senior Backend Engineer \(Berlin\) - Company: [Kadmos3]() - Location: Berlin, UK, Remote - Remote: Yes - Team: Engineering - Posted: September 15, 2025 ## Job description ### About the opportunity **About the opportunity** We are looking for a **Senior Backend Developer** who will take ownership of crucial backend 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 the backbone of our platform and driving innovation in a highly regulated environment. ### What you can expect * **Own the backend.** You will be responsible for developing and maintaining core backend systems, 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. * **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 backend engineering with **Java** Spring Boot. * Master's degree in Computer Science, Mathematics, or Physics. * Expertise in **Spring Boot** and strong knowledge of modern frameworks, SDKs, API standards, and libraries. * Solid experience with **unit, integration, and performance testing** (JUnit, Spock, Testcontainers). * 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. * Nice to have: familiarity with **React** and experience in building financial products. ### Why us * 🌱 Opportunity to work in a company with direct social impact * 💰 Attractive compensation * 🇺🇦 Open & International environment * 🏛️ Fantastic location in the heart of Berlin & flexible WFH policy * 🥘 Free lunch at the office * 💻 Latest equipment, to ensure you have everything needed ### About the company *Kadmos is on an ambitious mission to revolutionise 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.* *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 * ## Apply [Apply on Kadmos3]() Canonical job page: