Czym będziesz się zajmować? About the RoleWe are looking for a Senior Backend Engineer to join an international team responsible for building and maintaining high-performance, cloud-native backend services. This is a senior-level role with a strong focus on Python, asynchronous REST APIs, and MongoDB in production environments.You will work closely with product teams, data engineers, and DevOps to deliver scalable, secure, and reliable backend solutions running in the cloud.ResponsibilitiesDesign, develop, and maintain scalable backend services in PythonBuild asynchronous RESTful APIs with proper validation and error handling (FastAPI)Design and optimize NoSQL data models in MongoDBWork with MongoDB Atlas in production environmentsImplement secure authentication and authorization (OAuth2, JWT)Integrate backend systems with AWS services (e.g. S3, Lambda, Glue)Collaborate with cross-functional teams to deliver business-ready solutionsEnsure high code quality, documentation, and performance optimizationSupport modern CI/CD pipelines and automated testing

Kogo poszukujemy? Must-have Requirements5+ years of experience in backend developmentStrong Python experience, including FastAPI and asynchronous programmingSolid experience designing and implementing REST APIsHands-on experience with MongoDB (Motor, PyMongo, Beanie)Experience managing MongoDB Atlas in productionKnowledge of OAuth2, JWT, and secure API designExperience integrating external APIsPractical knowledge of AWS servicesStrong coding standards, type safety, and documentation mindsetNice to HaveExperience with CI/CD pipelines and automated testingExposure to event-driven or message-based architecturesKnowledge of monitoring and performance tuningExperience in multi-cloud or additional cloud platforms