Joining a fast-growing European logistics tech company building the infrastructure that makes last-mile delivery smarter, greener, and more reliable.La experiencia que se espera de los solicitantes, así como las habilidades y cualificaciones adicionales necesarias para este trabajo, se enumeran a continuación.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.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 * Ja

📌 Senior Python Backend Engineer (Antas de Ulla)
🏢 Shakers
📍 Antas de Ulla