Senior Software Engineer (Backend): Ledger - Wallets (Fintech)

Location: Europe; hybrid/remote policy. Other locations: Sofia, Bulgaria; Poland; Cape Town, Western Cape, South Africa; Spain.

Salary: €85,000–€95,000 EUR; Bulgaria: €85,000–€95,000 EUR; Spain: €95,000–€105,000 EUR; Poland: 350,000–420,000 PLN.

Company

hirify.global provides stablecoin-powered financial infrastructure for enterprises and is part of Mastercard, supporting fiat and digital-asset payments across 130+ countries.

What you will do

• Design and implement services managing the complete lifecycle of fiat and crypto wallets, including creation, activation, blocking, suspension, and termination.
• Build wallet infrastructure for direct merchants, embedded partners, and their underlying customers across new products, entity structures, and custody models.
• Integrate with Digital Assets, Fiat, Onboarding, Billing, and other domains.
• Develop reliable, horizontally scalable services using hexagonal architecture; contribute to HPA tuning, DLQ handling, and performance optimization.
• Participate in on-call rotations, incident response, production monitoring, architecture reviews, and technical design submissions.
• Write well-tested and documented code while upholding microservices standards.

Requirements

• 5+ years of backend engineering experience with Java or Kotlin and Spring Boot.
• Strong distributed-systems fundamentals and experience building event-driven microservices with Kafka and SQS, relational databases such as MySQL or PostgreSQL, and Redis caching.
• Experience building or maintaining account or wallet systems, lifecycle state machines, or financial entity-management systems where correctness and auditability are essential.
• Solid understanding of domain-driven design and hexagonal architecture, including bounded contexts and clearly defined service boundaries and interaction modes.
• Experience designing and evolving RESTful APIs for internal services and external customers, including backward compatibility and developer experience.
• Effective collaboration with product managers, operations teams, and cross-domain engineers; comfortable working across time zones in a remote-first setup.
• Production ownership experience covering on-call work, incident response, and monitoring with Grafana, Prometheus, or Micrometer.
• Familiarity with CI/CD pipelines, infrastructure as code, and observability tooling.
• Open to participating in an out-of-hours on-call rota.

Nice to have

• Experience with multi-tenant architectures and tenant migration patterns.
• Background in embedded finance, BaaS, or B2B2C payment platforms.
• Familiarity with database migrations in high-throughput systems.
• Experience with dynamic validation engines or capability and feature-flag systems.
• Experience with stablecoin, crypto, or blockchain-adjacent products.

Culture & Benefits

• Flexible working hours with hybrid working at the core of the policy.
• Flexible holiday approach.
• Opportunities to travel to offices around the world.
• Open, creative, diverse, and inclusive working environment.
• Salary packages vary by location, experience, and relevant certifications.