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.

?️ 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 current legacy stack)
• Familiarity with Oracle databases
• Experience with Google Cloud Platform, GitHub Actions, or GCP Clo

📌 Senior Software Engineer (España)
🏢 Shakers
📍 España