> Markdown version of [/jobs/ext/3834485-mid-level-backend-data-engineer-etl-elt-python-hybrid](https://www.wearedevelopers.com/jobs/ext/3834485-mid-level-backend-data-engineer-etl-elt-python-hybrid). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Mid-Level Backend Data Engineer - ETL/ELT, Python - Hybrid - **Company:** Flanks - **Location:** Barcelona, Spain - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), Extract Transform Load (ETL), Python (Programming Language), NoSQL, SQL Databases, Backend, Data Pipelines - **Published:** October 19, 2026 - **Apply:** https://www.jobleads.com/es/job/mid-level-backend-data-engineer-etl-elt-python-hybrid--barcelona--ea3d00e2befcd0f567fefbc71cd562424 ## About the Role We value strong Python and/or JavaScript engineering, experience with ETL/ELT pipelines, and proficiency in SQL/NoSQL. ## Description Flanks in Barcelona is seeking a Mid-Level Backend Engineer to design, build, and optimize the data pipelines and backend services that power our data-driven decisions. You will own the full lifecycle of ingestion and transformation, shaping the backend infrastructure that supports our platform. We value strong Python and/or JavaScript engineering, experience with ETL/ELT pipelines, and proficiency in SQL/NoSQL.