Senior Software Engineer (Python)
Summary
Senior backend engineer at a European last-mile logistics company: keep the Java + Oracle PUDO parcel platform stable while progressively migrating it to Python + PostgreSQL, rewriting carrier integrations, introducing automated testing, and managing your own production deployments.
Joining a fast-growing European logistics tech company building the infrastructure that makes last-mile delivery smarter, greener, and more reliable. This is a backend engineering role at the heart of a critical platform migration, embedded in an empowered product squad.
The challenge
The PUDO platform processes thousands of daily parcel events across Spain and Portugal on a large, battle-tested Java + Oracle codebase. The mission: keep that system stable and reliable while progressively migrating it to a modern Python + PostgreSQL stack. This is not a rewrite from scratch. It requires technical judgment, respect for what works, and the ability to plan and execute a migration without disrupting live operations.
- Own and evolve the existing Java + Oracle codebase while driving the migration to Python + PostgreSQL
- Lead the rewrite of critical carrier integrations on the new stack
- Introduce and champion automated testing in a codebase with no prior test coverage
- Help shape the AI-assisted development workflow for maintaining and evolving the legacy system
- Manage your own deployments and take accountability for what runs in production
- Collaborate with Engineering and Product Managers across the full product lifecycle
- Extensive Python experience with solid ecosystem knowledge
- Proven track record working with and improving legacy codebases
- Experience planning and executing technology migrations