Backend Python Developer

Location: Poland

We Are

RTB House is a next-generation performance demand-side platform (DSP) that uses proprietary Deep Learning AI algorithms to help brands grow. The company is the market leader in driving performance using Deep Learning across the entire purchase funnel.

Founded in 2012 and now operating in 90+ markets, RTB House has always been private-by-design. It embraces first-party advertising and a relentless approach to innovation. RTB House offers end-to-end Deep Learning-powered AdTech products and solutions to maximize conversion, drive new customer acquisition, create engagement, and fuel long-term demand for a global base of clients.

In 2026, RTB House launched rtb.com, a self-service platform specifically designed to allow small and medium-sized businesses and agencies to deploy auto-built creatives and maximize performance on any budget.

We are looking for a Python Software Engineer to join our internal team at RTB House. You will work on applications and tools that directly support our real-time bidding business, collaborating with experienced engineers and product teams. This position is ideal for developers who want to grow their skills, solve real-world problems, and build reliable software that makes a visible difference.

You Will

Design, develop, and maintain internal web applications responsible for ad campaigns management, e.g. configuration, monitoring, automation

Implement jobs and processes to integrate internal services

Contribute to the development of internal Python libraries and shared frameworks

Write and maintain unit/integration tests to ensure code quality and reliability

Identify issues and propose improvements to enhance performance, scalability, and stability

Collaborate with cross-functional teams to deliver new features and improve existing workflows

Apply best practices in application design, databases, and APIs

Desired Experience

Solid experience in backend development with Python

Familiarity with relational databases and ability to write efficient SQL queries (PostgreSQL, BigQuery is a plus)

Understanding of RESTful and GraphQL APIs conventions and best practices

Experience in asynchronous programming

Good understanding of system design concepts (e.g. scalability, caching, reliability) and willingness to learn more

Experience with writing and maintaining tests

Problem-solving skills and the ability to work methodically through technical challenges

Good communication skills and ability to work in a team

Fluency in English

Selected Technologies

Backend: Python, FastAPI

Databases: PostgreSQL, BigQuery

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 our own products, where long-term quality and reliability truly matter

Participation in one of the most interesting projects of the online industry in Poland and one of the fastest growing technology companies in Europe

Collaboration with flexible contract options (B2B or contract of mandate)

Apply now!

You don't need to tick every box to apply. If you are passionate about digital marketing, send us your CV, and we'll review it.