Job description
Senior Backend Engineer (m/f/x)
Company Overview
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.
Job Summary
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.
Key Responsibilities
- 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.
Requirements / Qualifications
- 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.
Preferred Qualifications
- Familiarity with React and experience in building financial products.
Location
Berlin, Germany
Salary & Benefits
- 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
- Learning & Development budget
