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

📌 Senior Python Backend Engineer (España)
🏢 Shakers
📍 España