Senior Data Engineer (Big Data Solutions)

Quick Facts

• Start: November 2026

• Work mode: Remote (occasional office visits)

• Contract: B2B

• Rate: 170–200 PLN/h net + VAT

Description

Design, build, and improve data processing solutions, including ETL pipelines and optimization of relational databases—primarily PostgreSQL. Implement Apache NiFi flows and advanced SQL/data modeling to support large-scale data volumes. Develop REST API capabilities in collaboration with the Frontend team.

Responsibilities

• Design, create, and develop relational databases (especially PostgreSQL)

• Design and implement data flows in Apache NiFi and ETL processes

• Optimize databases and SQL queries for large data volumes

• Design and develop REST APIs with the Frontend team

• Perform advanced data modeling and optimize data processing workflows

• Co-create technical requirements for APIs, infrastructure, and databases for new solutions

Requirements

• Minimum 6 years of experience with relational databases

• At least 5 years of experience building ETL processes and optimizing databases

• Expert knowledge of Apache NiFi (designing and implementing data flows)

• Very good knowledge of PostgreSQL, relational databases, and advanced SQL

• Ability for advanced data modeling

• Experience designing and implementing REST API applications

• Basic knowledge of Python, Linux, and Bash

• Independence, responsibility, and analytical problem-solving

• English at least B2

Benefits

• Long-term project with high business significance in the energy sector

• Remote work with occasional office visits

• B2B cooperation with rate up to 200 PLN/h net + VAT

• 14-day invoice payment terms

• Private medical care

• Access to the MyBenefit cafeteria platform (e.g., MultiSport and prepaid cards)

• Fast and transparent recruitment process