Backend Python Developer

Back to jobs Backend Python Developer Warsaw, Masovian Voivodeship, Poland Apply Location: Poland We Are: RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel. We are looking for a Backend Python Developer 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 Attractive compensation 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 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. Apply for this job * indicates a required field First Name* Last Name* Email* Phone Country Phone Resume/CV* Attach Attach Dropbox Google Drive Enter manually Enter manually Accepted file types: pdf, doc, docx, txt, rtf LinkedIn Profile Do you have the right to work in the location in which this role is based?* Select... Country* Select... Current Company* Current Job Title * Data Privacy Notice * Select... Dear Candidate, When you apply to a job on this site, the personal data contained in your application will be processed by the company of the RTB House corporate group for which a given recruitment process is conducted. For details, please click on the relevant link below based on the localization of the entity publishing the job post. List of the entities: Poland Czech Republic, Romania, Bulgaria, Slovakia, Hungary Ukraine APAC: Australia, Singapore, Vietnam, Thailand, China, Hong Kong, Indonesia, Philippines Nordics: Sweden, Norway, Finland, Denmark UK Germany France Brazil Benelux Turkey Japan USA United Arab Emirates, MEA, Israel Cyprus Argentina, Mexico Spain, Portugal Italy South Korea Taiwan Saudi Arabia India By clicking the “Acknowledged” button you confirm that you have read our Recruitment Privacy Notice. Submit application