Python Data Engineer

You Will

• Design, develop, and maintain the backend for web applications responsible for presenting massive-scale campaign statistics and financial data.
• Build and optimize large-scale data processing jobs (ETL/ELT) that feed core analytics and reporting systems.
• Contribute to the development of internal Python libraries focused on high-performance data processing and analytics.
• Write and maintain unit/integration tests to ensure data integrity and code quality.
• Identify bottlenecks and propose improvements to enhance data pipeline performance, query speed, and data accuracy.
• Collaborate with Data Analysts and Product teams to deliver new metrics and analytical capabilities.
• Apply best practices in application design, data modeling, and building APIs for data-heavy applications.

Desired Experience

• Solid experience in backend development for data-intensive applications with Python.
• Strong proficiency with relational databases and the ability to write highly efficient, optimized SQL queries; PostgreSQL and BigQuery are key.
• Understanding of RESTful and GraphQL API conventions, especially for serving analytical data.
• Experience in asynchronous programming.
• Good understanding of system design concepts in the context of Big Data, including data warehousing, ETL optimization, and scalability, with willingness to learn more.
• Experience writing and maintaining tests.
• Problem-solving skills and the ability to work methodically through complex data challenges.
• Good communication skills and ability to work in a team.

Selected Technologies

• Backend: Python, FastAPI
• Databases: BigQuery, PostgreSQL
• GraphQL: Ariadne
• Messaging: Google Pub/Sub
• Data Handling & Validation: Pydantic, dataclasses
• Testing: Pytest
• Monitoring: Sentry, Prometheus, Grafana
• CI/CD: GitHub Actions
• Cloud: GCP, Kubernetes

We Offer

• Being part of a small team with a high degree of autonomy and decision-making.
• Access to the latest technology in the developed solution.
• Opportunity to build and improve products where long-term quality and reliability matter.
• Participation in an online-industry project.
• Flexible contract options: B2B or contract of mandate.