Sumsub is the first AI-powered trust infrastructure for compliance operations at scale. It connects identity and business verification, fraud prevention, transaction monitoring, and risk workflows, helping teams reduce manual work and enter new markets.Trusted by over 4,000 clients across financial services, crypto, mobility, trading, marketplaces, education, and iGaming, including Bybit, Bitpanda, Wirex, Avis, Vodafone, Duolingo, Kaizen Gaming, and Bancaribe.Sumsub is recognized as a Great Place To Work® in the US and rated 4.3 out of 5 on Glassdoor. Our 1,000+ people around the world back it up, too: 92% are proud to be Sumsubers, and 90% say their work is interesting and challenging.Now we are looking for a Senior Backend Engineer to build backend services for the 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 DoingDesign and develop backend services for the Travel Rule product,



enabling secure data exchange between crypto service providersBuild and maintain integrations with multiple third-party providers, implementing various partner protocols and APIsWork with asynchronous, event-driven architectures to handle slow, unreliable, or partially available external systemsEnsure high reliability, fault tolerance, and observability of distributed services under real-world constraintsCollaborate with product and engineering teams to evolve the platform and support new regulatory and network requirementsTake ownership of backend components from design through production and long-term maintenanceAbout YouStrong 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,

📌 Senior Backend Developer (España)
🏢 Sumsub
📍 España