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.

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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.

Responsibilities
- 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

Requirements
- Extensive Python experience with solid ecosystem knowledge
- Deep PostgreSQL expertise: data modelling, query optimisation, complex datasets
- Proven track record working with and improving legacy codebases
- Experience planning and executing technology migrations
- Background in high-traffic, high-volume backend systems
- Strong unit and integration testing skills, including introducing tests to untested codebases
- AI tools as a core, systematic part of your daily workflow
- Proficiency with Docker, REST APIs, CI/CD pipelines, Git and GitHub

Nice to have
- Java experience (the curre

📌 Senior Python Backend Engineer (España)
🏢 Cv-Library
📍 España