Senior Backend Engineer (m/f/x)

We are looking for a Senior Backend Engineer 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. In 2025 Kadmos was acquired by a Japanese shipping conglomerate NYK. For more information, visit https://www.kadmos.io/