Backend Data Pipelines Engineer - Hybrid, Barcelona

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

Ventajas ofrecidas por este puesto de trabajo

Full-time contract

Salary €35,000–€50,000 gross per year

Hybrid work options

Birthday day off

Weekly fruit, coffee and tea

Friday happy hours

Team-building events

Health insurance

Flexible compensation with Alan

Digital canteen with Kombo 50% subsidy

Yearly training budget

Descripción de la vacante

Flanks in Barcelona is seeking a Mid-Level Backend Engineer to design, build, and optimize data pipelines and backend services, enabling reliable data flow across the organization. You will own the full lifecycle of data ingestion and transformation from business requirements to production deployment.

You should write clean Python or JavaScript, work with SQL and NoSQL, and collaborate on schema design while optimizing performance.

Formación

• Strong Python and/or JavaScript engineering skills, with a focus on performance, memory efficiency, and writing maintainable, production‑grade code.
• Experience building and operating data pipelines—ETL/ELT patterns, pipeline orchestration, and handling large-scale data ingestion—or experience building backend services for a product, ideally with exposure to Elasticsearch.
• Familiarity with both SQL and NoSQL databases, including schema design and query optimization.
• Comfort working autonomously — able to take a high‑level requirement, define scope, and drive it to production without heavy hand‑holding.
• Ability to navigate unfamiliar codebases quickly and contribute meaningfully from an early stage.
• Experience with CI/CD workflows and containerization (Docker or similar).
• Willingness to understand the financial data we work with and the formulas you will be responsible for implementing.
• Language Proficiency: Professional proficiency in both English and Spanish to collaborate effectively in our bilingual environment.

Responsabilidades

• Design, develop, and maintain scalable ETL/ELT pipelines to ingest, transform, and load data from multiple disparate sources into our core systems.
• Write clean, efficient Python code with a strong focus on performance — applying optimal data structures and algorithms to handle high-volume datasets reliably.
• Collaborate on database schema design (SQL and NoSQL) and own query performance optimization to ensure fast, accurate data access.
• Implement unit tests, integration tests, and data quality checks to guarantee pipeline integrity and catch issues before they reach production.
• Deploy and iterate on pipelines using CI/CD practices and containerization tools such as Docker, participating actively in code reviews to uphold team standards.

Conocimientos

Python

JavaScript

ETL/ELT

SQL

NoSQL

Elasticsearch

CI/CD

Docker

Data pipelines

Performance

Herramientas

Docker

Elasticsearch

CI/CD

Descripción del empleo

Flanks in Barcelona is seeking a Mid-Level Backend Engineer to design, build, and optimize data pipelines and backend services, enabling reliable data flow across the organization. You will own the full lifecycle of data ingestion and transformation from business requirements to production deployment.

You should write clean Python or JavaScript, work with SQL and NoSQL, and collaborate on schema design while optimizing performance.