Software Engineer (python,Django,Pandas/ Polars)

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Beschreibung

Technical Requirements, must-have: 1. Python in production Idiomatic Python — packages and modules, type hints, exception handling, dependency and virtual-environment management. You can read an unfamiliar codebase and change it safely. 2. Django Models, migrations, querysets, the admin, middleware, settings across environments. You understand the ORM well enough to know when it will generate a bad query. 3. Django REST Framework Serializers, viewsets, permissions, authentication, pagination, versioned endpoints, and a clean OpenAPI/Swagger contract. 4. PostgreSQL and SQL Schema design, migrations, indexing, reading query plans, transaction behaviour, and writing non-trivial SQL by hand. You can tell whether a query will hold up under load. 5. Message queue / task queue Experience with an asynchronous task or message queue — Celery with Redis or RabbitMQ, RQ,  or equivalent. Queues and workers, scheduling, retries with backoff and failure handling, and debugging a job that silently never ran. You know why a task must be safe to execute twice. 6. Redis Working knowledge as a broker/result backend and cache: keys and expiry, data structures, connection and memory behaviour, and what happens when it fills up or restarts. 7. pandas or polars Loading and transforming tabular data from CSV, Excel, JSON and Parquet. Comfortable with joins, reshaping, dtypes, null handling, and tracing a bad value from source file to database record. 8. Google Cloud Platform (or an equivalent cl

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