Sumsub is a leading full-cycle verification platform that enables scalable compliance. From identity and business verification to ongoing monitoring, our platform adapts to different risk appetites and market demands, ensuring global compliance. It allows customizing analytics and workflows with a no-code interface.

Over 4,000 clients — including Bitpanda, Wirex, Avis, Bybit, Vodafone, Duolingo, Kaizen Gaming, and TransferGo — trust Sumsub to accelerate growth, prevent fraud, and maintain compliance worldwide.

Now we are looking for a Senior Backend Engineer to build backend services for our Travel Rule product . This role is an exciting opportunity to work on complex integrations and real-world distributed systems in the crypto compliance domain.

What You Will Be Doing:

• Design and develop backend services for the Travel Rule product, enabling secure data exchange between crypto service providers
• Build and maintain integrations with multiple third-party providers, implementing various partner protocols and APIs
• Work with asynchronous, event-driven architectures to handle slow, unreliable, or partially available external systems
• Ensure high reliability, fault tolerance, and observability of distributed services under real-world constraints
• Collaborate with product and engineering teams to evolve the platform and support new regulatory and network requirements
• Take ownership of backend components from design through production and long-term maintenance

About You:

• Strong backend engineering experience (Java or similar languages) with a solid foundation in system design.
• Experience building and maintaining integrations with external systems and third-party APIs.
• Comfortable with asynchronous processing, distributed systems, and failure-prone environments.
• Good understanding of databases (MongoDB, ClickHouse, or similar) and data consistency trade-offs.
• Curious and motivated to work on complex, product-driven problems rather than purely technical challenges.
• Bonus: familiarity with crypto, blockchain fundamentals, or how crypto networks and wallets operate.

What We Offer:

The hiring stages: TA screening -> Hiring Manager Interview -> Assignment -> Final Interview.

Sounds like a great opportunity for your career development? Then go ahead and apply! We are a global community of innovators, creators, and thinkers, and we believe that diversity fuels our innovation. Sumsub is proud to be an equal opportunity employer, committed to building a diverse and inclusive workforce. We welcome applications from people of all backgrounds, cultures, genders, experiences, abilities and perspectives. Join us in shaping the future inclusively.