Python backend engineer FINTECH

Must have

• 3+ years professional experience with Python backend development.
• Strong experience with FastAPI (or similar ASGI frameworks) and REST API design.
• Solid PostgreSQL skills: modeling, migrations, query performance, transactions.
• Hands-on SQLAlchemy 2.x.
• Experience with async Python (asyncpg, httpx/aiohttp) in production services.
• Docker and basic Linux/cloud deployment literacy.
• Ability to read complex existing code, write clear tests, and ship safely in a regulated/financial domain.
• Good communication in Ukrainian. Some English for (code, docs, reviews).

Nice to have

• Google Cloud Platform: Cloud Run, Cloud SQL, Secret Manager, GCS, Cloud Tasks, BigQuery.
• Terraform.
• Kubernetes.
• Fintech / lending / billing domain: amortization, accruals, payment allocation, dunning/overdue logic.
• Alembic, Pydantic v2, pytest (including integration tests against a real DB).
• Experience with payment provider webhooks and idempotent event processing.
• Familiarity with Ukrainian ecosystem: Bank ID, UBKI, local payment/SMS providers.

Tech environment (summary)

Python 3.11 · FastAPI · PostgreSQL · SQLAlchemy · Alembic · Pydantic · GCP (Cloud Run, Cloud SQL) · Docker · GitHub Actions · pytest · Firebase · WebSockets

What we offer

• Work on a live lending product with real business impact.
• Modern Python stack with room to improve architecture and testing.
• Remote/hybrid.