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 general 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 Developer to join our rapidly growing team. This is an amazing opportunity to join Sumsub and make an immediate and real impact on the future of our product.
Stack Main language: Java 17
Java Framework: Dropwizard / Restler
DB: MongoDB / ClickHouse / Redis
Others: Apache Kafka / Kafka Streams / Elasticsearch / OpenSearch (k-NN) / Airflow
Responsibilities Development of data processing algorithms related to remote identification / authentication of individuals (both product and technical).




Improvement and development from scratch of internal tools for compliance officers.
Test driven development and A/B testing.
Optimization and automation of CI/CD pipelines to increase reliability and deployment speed.
Monitoring, troubleshooting, and performance tuning of cloud infrastructure and distributed systems.
About You Good command of the English language
Familiarity with our development stack
Understanding of product and a passion for building software that provides a great experience
Experience developing clean, high-quality code and automated tests to verify its operation
Team player, strong communication skills, and empathy
Demonstrated strong analytical and problem‐solving skills
Benefits Remote‐first, trust‐based culture. Work from the place that works best for you. No mandatory office days, no attendance trackers. In some locations, we provide offices or coworking spaces, but the choice is yours.
True flexibility. We do n

📌 Senior Backend Developer (Madrid)
🏢 Sumsub
📍 Madrid