Senior Backend Developer (Python Backend) for NATO
WLG • Warsaw, Masovian Voivodeship • Posted May 31, 2026
Position Overview
Would you like to join the leading international intergovernmental organization?
We are looking for a senior Python Backend contractor to support the modernization of existing applications as part of a broader platform transition. This is a highly hands-on role: the selected contractor must have strong practical experience and be able to contribute from day 1 with minimal ramp-up.
The main focus of this role is to refactor existing Python applications with minimal intervention to support the gradual decomposition of a monolith into a set of decoupled services, while ensuring that configuration and settings are fully environment-based.
This is a delivery-focused role, not a greenfield rewrite or architecture-only position. We are looking for an engineer who can assess the existing codebase quickly, identify pragmatic refactoring opportunities, and implement them directly.
Important: we will only consider candidates whose primary professional ...