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# Remote Senior Backend Python Developer

- **Company:** Shakers
- **Location:** Madrid, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Artificial Intelligence, Automation of Tests, Unit Testing, Big Data, Cloud Computing, Code Coverage, Continuous Integration, Github, Python (Programming Language), PostgreSQL, Oracle Databases, Oracle (Applications), Query Optimization, Google Cloud, Backend, Git, Codebase, Restful APIs, Docker
- **Published:** September 14, 2026
- **Apply:** https://www.buscojobs.com.es/remote-senior-backend-python-developer-en-madrid-ID-370939084

## About the Role

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 Cloud Build
Data-driven mindset; experience in Product-led or multidisciplinary teams

## Description

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 challengeThe 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.ResponsibilitiesOwn and evolve the existing Java + Oracle codebase while driving the migration to Python + PostgreSQLLead the rewrite of critical carrier integrations on the new stackIntroduce and champion automated testing in a codebase with no prior test coverageHelp shape the AI-assisted development workflow for maintaining and evolving the legacy systemManage your own deployments and take accountability for what runs in productionCollaborate with Engineering and Product Managers across the full product lifecycleRequirementsExtensive Python experience with solid ecosystem knowledgeDeep PostgreSQL expertise: data modelling, query optimisation, complex datasetsProven track record working with and improving legacy codebasesExperience planning and executing technology migrationsBackground in high-traffic, high-volume backend systemsStrong unit and integration testing skills, including introducing tests to untested codebasesAI tools as a core, systematic part of your daily workflowProficiency with Docker , REST APIs , CI/CD pipelines , Git and GitHubNice to haveJava experience (the current legacy stack)Familiarity with Oracle databasesExperience with Google Cloud Platform, GitHub Actions, or GCP Cloud BuildData-driven mindset; experience in Product-led or multidisciplinary teamsWhy this project?A genuinely complex engineering challenge: not a greenfield build, but a high-stakes migration on a live production system that carriers and consumers depend on daily.You will lead one of the most critical pieces of that migration from day one, with full ownership and AI tooling provided.Long-term, fully remote, within a company growing fast across five European markets.Ready to take end-to-end ownership of a platform that moves millions of parcels?Let's talk.#PythonEngineer #BackendEngineering #LegacyMigration #LogisticsTech #RemoteWork


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