About this role
Senior Backend Developer (Services) at payabl.. Location: Lisbon or Portugal or Ukraine. Role: designing services, refactoring systems, ensuring reliability Requirements: 5+ years backend development with strong Python expertise, deep knowledge of AsyncIO and FastAPI, experience building non-blocking microservices, relational DBs (MySQL/PostgreSQL), API design, testing, and legacy system migration. Category: Software Development Seniority: Senior Level Tools: Python, AsyncIO, FastAPI, MySQL, PostgreSQL, PHP, Perl, JavaScript, Kafka, Redis, CI/CD, Docker, Kubernetes, 3DS Commitment: Contract Workplace: Remote Languages: English