Senior Backend Developer – External Integrations

About this role

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, and Kaizen Gaming.


Sumsub is certified as a Great Place To Work® in the US, recognized as a TIME & Statista Excellent Workplace, honored with the TrustRadius Tech Cares Award for Diversity & Inclusion, and rated 4.7 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.


We are looking for a
Senior Backend Engineer
to join our External Integrations Team. You will play a key role in developing and maintaining the infrastructure behind 100+ integrations with external data providers, ensuring that our platform grows fast, reliably, and at scale in the rapidly expanding world of document digitalization.


Our Stack:

• Main language: Java 17
• Java Framework: Dropwizard / Restler
• DB: MongoDB / ClickHouse / Redis
• Others: Apache Kafka / Kafka Streams / ElasticSearch / OpenSearch (k-NN) / Airflow

What You Will Be Doing:

• Design, build, and optimize backend components powering our external provider integrations
• Ensure high stability, performance, and observability across a large integrations ecosystem
• 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

Nice To Have:

• Experience implementing integrations using Feign or similar HTTP client frameworks
• Strong background in building resilient distributed system...