Senior Software Engineer (Backend): Treasury Automation

As a Senior Software Engineer in Treasury Automation at BVNK, you build the control layer for how money moves across banks, blockchains and liquidity providers in fiat and digital assets. You join a team that turns treasury policy into automation, ensuring funds flow correctly across regulated entities in multiple jurisdictions. Your work powers liquidity management, settlement and client fund safeguarding at scale, processing billions annually.

What you'll do

• Build liquidity management systems that track positions across every account, venue and chain, and rebalance funds automatically
• Power accurate, on-time settlement with liquidity providers and partners
• Automate safeguarding and segregation of client funds across entities and jurisdictions
• Evolve the treasury rules engine that turns policy into fund movements for BVNK and Layer1 customers
• Design event-driven services and long-running Temporal workflows: idempotent, traceable until confirmed and auditable to regulatory standards
• Own production systems: observability, alerting, runbooks and on-call for services that move real money
• Act as a technical leader: shape designs, raise the bar in code review, mentor engineers and help set direction with your Tech Lead

What you bring

• 5+ years of backend engineering experience in Java/Kotlin with Spring Boot
• Strong distributed systems fundamentals with experience building microservices using event-driven architectures (Kafka, SQS), relational databases (MySQL/PostgreSQL) and caching (Redis)
• Experience building or maintaining account or wallet systems where correctness and auditability are non-negotiable
• Solid grasp of domain-driven design and hexagonal architecture, with ability to model complex domains cleanly and define bounded contexts
• API design skills, including experience designing and evolving RESTful APIs for both internal services and external customers
• Collaborative communication style: you work effectively with product managers, operations teams and cross-domain engineers across time zones in a remote-first setup
• Production ownership mentality with experience in on-call, incident response and operational monitoring (Grafana, Prometheus, Micrometer)
• Familiarity with CI/CD pipelines, infrastructure-as-code and observability tooling
• Understanding of money movement in payments, settlement, liquidity or treasury contexts across fiat and/or crypto
• Willingness to participate in out-of-hours on-call rotation

Nice to have

• Experience in payments, banking or other regulated financial services
• Experience with multi-tenant architectures and tenant migration patterns
• Background in embedded finance, BaaS or payment platforms serving B2B2C models
• Familiarity with database migrations in high-throughput systems
• Experience with dynamic validation engines or capabilities/feature-flag systems
• Experience with stablecoin, crypto or blockchain-adjacent products

What we offer

• Fair and competitive salary: Bulgaria €85,000-€95,000 EUR; Spain €95,000-€105,000 EUR; Poland 350,000-420,000 PLN
• Hybrid/remote working policy with flexible hours
• Flexible approach to holiday
• Opportunities to travel to offices around the world

About BVNK

BVNK is the stablecoin-powered financial stack for enterprises, now part of Mastercard. The company enables businesses to move money in seconds across 130+ countries with 40+ licenses for fiat and digital assets globally, serving industry leaders like Corpay, Worldpay, Deel and Flywire. BVNK has been recognized by CNBC as one of the World's Top Fintech Companies and by LinkedIn as a Top 20 UK Startup.