Mid Backend Engineer (Data-focused) (Python / ETL) | €35K - €50K

Joppy; Barcelona; Híbrido; EUR 35.000 - 50.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Health insurance

Flexible work hours

Birthday day off

Weekly fruit, coffee & tea

Friday happy hours

Team-building events

Training budget

Barcelona office with views

Descripción de la vacante

Joppy is seeking a skilled Mid-Level Data Engineer to design, build, and optimize data pipelines and backend services that ensure clean, reliable data across the organization. The role is based in Barcelona with a hybrid work model, on a full-time permanent contract.

You will write clean Python code, collaborate on database design (SQL/NoSQL), and implement tests and data quality checks to ensure production integrity.

Formación

• 3+ years of Python experience in production systems.
• Experience designing and operating ETL/ELT pipelines from multiple sources.
• Familiarity with SQL and NoSQL databases and query optimization.
• Implement unit and integration tests and data quality checks.
• CI/CD workflows and containerization using Docker.

Responsabilidades

• Design, develop, and maintain scalable ETL/ELT pipelines to ingest, transform, and load data from multiple sources.
• Write clean, efficient Python code focused on performance and maintainability.
• Collaborate on database schema design (SQL and NoSQL) and optimize query performance.
• Implement tests and data quality checks to ensure pipeline integrity.
• Deploy and iterate on pipelines using CI/CD and Docker, participate in code reviews.

Conocimientos

Python

ETL/ELT pipelines

CI/CD

Docker

SQL

NoSQL

Testing

Bilingual EN/ES

Herramientas

Docker

CI/CD

Descripción del empleo

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 flexible compensation
• Yearly training budget for continuous growth

About Joppy

Joppy is a technology recruitment platform built for developers by developers.