Python Developer

6 dni temu

Województwo mazowieckie, Polska Explore Group Pełny etat 180 000 zł - 260 000 zł Umowa

Location: Warsaw, Poland (Hybrid, weekly office visits)

Contract Type: B2B Contract

Start Date: ASAP

About the Project

We are expanding our data engineering team to build and maintain high-scale transaction fee calculation and portfolio management engines supporting platforms managing over one trillion euros in assets. You will design, develop, and optimize data processing workflows handling large-scale datasets, ensuring peak operational performance, database resilience, and processing speed.

Key Responsibilities

  • Build and maintain robust data pipelines and automated processing services using Python and relational database engines
  • For Senior engineers: lead advanced SQL query optimization, indexing strategies, execution plan tuning, and performance profiling across tables containing millions of rows
  • Integrate data frameworks to streamline ingestion, transformations, and transaction fee logic
  • Collaborate closely with distributed engineering and infrastructure teams across Europe in a hybrid structure

Requirements

  • Junior Level: 1 to 2 years of commercial software or data engineering experience with strong Python and SQL skills
  • Senior Level: 3 to 5 years of commercial experience with expert-level SQL and deep knowledge of performance tuning at enterprise scale
  • Bachelor of Science (BSc / Inżynier) degree in Computer Science, Software Engineering, or a related technical discipline
  • Hands‑on experience with relational databases, with PostgreSQL strongly preferred
  • Familiarity with high‑throughput Python data libraries; experience with Polars is a distinct advantage
  • Strong communication skills in English (B1/B2 minimum for Junior, fluent for Senior)