Senior Software Engineer (Backend): Cards
Job description
Senior Software Engineer on BVNK's Cards team, building a card issuing and transaction platform that bridges crypto and fiat. The role designs and implements card platform features end-to-end within small autonomous squads.
At a glance
- Work mode
- Hybrid · Bulgaria · Spain · Poland
- Pay
- EUR 70,000 – 110,000 / year
What you'll do
- Design and implement card platform features end-to-end - from tokenization and sensitive card data handling to transaction enrichment and settlement workflows
- Build and maintain integrations with card issuers and payment processors
- Architect systems spanning multiple services, ensuring scalability, security, and PCI compliance
- Own features and projects from inception to completion, breaking down complex domains into deliverable work items
- Drive cross-team technical initiatives around shared libraries, patterns, and infrastructure
- Actively review code across the team, providing constructive and in-depth feedback
- Contribute to our engineering culture by mentoring teammates and setting quality standards
What we're looking for
- 5+ years experience as a Backend Engineer, preferably in FinTech or payments
- Expertise in Java and Spring Boot
- Experience building and maintaining APIs and services in a microservices architecture
- Strong understanding of card payments, issuing, or transaction processing
- Enthusiasm for adopting AI-assisted development tooling (e.g, Claude Code, AI code review agents) to accelerate delivery and improve code quality across the squad
- Ability to self-direct work and scale from well-scoped tasks to multi-sprint initiatives
- Excellent problem-solving skills, comfortable working independently or collaboratively across squads
- Experience with containerisation and orchestration technologies including Docker and Kubernetes
- Experience with code review as a tool for mentoring and raising team-wide standards
- Good written and verbal communication skills
- Open to participating in an out-of-hours on-call rota
Nice to have
- Familiarity with crypto/fiat payment rails
Your team
Cards team
Building a seamless card issuing and transaction platform that bridges crypto and fiat, enabling merchants to offer customers instant access to funds through physical and virtual cards.
Benefits
- Fair and competitive salary at every stage of your growth
- Flexible working hours, with hybrid working at its heart
- A culture built on passionate, growth-minded people
- A flexible approach to holiday
- Opportunities to travel to our offices around the world
- An open and creative environment where you can help us define the future of BVNK, its culture, and its opportunity sets
Apply
About BVNK
The stablecoin-powered financial stack for enterprises
BVNK enables businesses to build financial products, unlock new markets, and move money in seconds across 130+ countries, with 40+ licenses for fiat and digital assets globally. Processing billions annually, it empowers enterprises to send, receive, convert, and settle stablecoins and fiat through a single integration. BVNK is now part of Mastercard.
Mission
To accelerate global money movement
Key facts
- Stablecoin-powered financial infrastructure / payments
- Part of Mastercard
- Enables money movement across 130+ countries
- 40+ licenses for fiat and digital assets globally
- Processing billions annually
- Team spread across EMEA, North America, and APAC
- Recognized by CNBC World's Top Fintech Companies (2026)
- Recognized by FXC Intelligence Top 100 Cross-border Payment Companies (2026)
- Newsweek's The Top 100 Global Most Loved Workplaces (three years running, most recently 2025)
- LinkedIn Top 20 Startups in the UK (2025)
Partners & customers
What they value
- Passionate
- Growth-minded
- Diverse and inclusive
- Open and creative