Senior Backend Developer (Services) - Relocation to Cyprus

We're powering the growth of merchants by helping them take payments easily, securely and globally.

• 5+ years of backend engineering experience with strong Python expertise and deep AsyncIO proficiency.
• Production-grade experience with FastAPI.
• Experience with MySQL and/or PostgreSQL including query design, schema understanding, and migration strategies.
• Experience writing unit and integration tests (pytest preferred).
• Expertise in designing and consuming external APIs with webhooks, callbacks, and retry policies.
• Willingness to take full ownership of high-traffic, always-up applications.
• Comfortable working in complex distributed environments where reliability is critical.
• Ability to write clean, intentional code and explain engineering decisions.
• Strong written and verbal English communication skills.

Nice to have:

• Experience with PHP, Perl, or JavaScript for legacy comprehension.
• Kafka and Redis experience.
• Familiarity with Docker, CI/CD, and Kubernetes.
• Exposure to financial industry including fintech, payments, 3DS, Token Management Systems, or payment gateway integrations.
• Experience migrating systems from one language or paradigm to another.

• Read legacy code (PHP, Perl, or JavaScript), extract business logic, and reimplement it within a modern microservices architecture.
• Ensure idempotency, data integrity, and graceful error handling across all services.
• Build new features from scratch and refactor existing legacy modules into clean, maintainable code.
• Design and consume external APIs with understanding of webhooks, callbacks, and complex retry policies.
• Collaborate effectively across departments using strong English communication in agile sprints.
• Bring a product-focused mindset to understand business logic and end-user impact.
• Contribute to CI/CD pipelines, Docker, or Kubernetes infrastructure.
• Propose and advocate for tools or technologies to improve performance, security, or development speed.

This is a fully remote role for candidates based in Poland. Candidates open to relocation to Cyprus will receive specific working arrangements and conditions during the recruitment process.