We're looking for a skilled Mid-Level Data Engineer for one of our clients (TOP Startup) to design, build, and optimize data pipelines and backend services that ensure clean, reliable data across the organization.

- Design, develop, and maintain scalable ETL/ELT pipelines to ingest, transform, and load data from multiple sources.

- Write clean, efficient Python code with a focus on performance, memory efficiency, and maintainability.

- Collaborate on database schema design (SQL and NoSQL) and optimize query performance for fast, accurate data access.

- Implement unit tests, integration tests, and data quality checks to ensure pipeline integrity and prevent issues before production.

- Deploy and iterate on pipelines using CI/CD practices and containerization tools such as Docker, and participate actively in code reviews.

- Strong Python engineering skills (at least 3 years of professional experience) with emphasis on performance and production-quality code.

- Experience building and operating ETL/ELT data pipelines,



pipeline orchestration, and large-scale data ingestion.

- Familiarity with SQL and NoSQL databases, including schema design and query optimization.

- Ability to work autonomously, taking high-level requirements from scope definition to production.

- Capability to quickly understand and contribute to unfamiliar codebases.

- Experience with CI/CD workflows and containerization (e.g., Docker).

- Professional proficiency in both English and Spanish.

- Full-time, permanent contract

- Salary range of €35,000–€50,000 gross per year, based on experience
- An office with stunning views of Barcelona

- Flexible working hours and hybrid work options

- Paid day off on your birthday

- Weekly fresh fruit, coffee, and tea

- Friday happy hours (optional)

- Team-building events

- Health insurance and adaptable

📌 Mid Backend Engineer (Data-focused) (Python / ETL)
🏢 Joppy
📍 Barcelona