Back End Developer

Job Description Role: Backend Developer / Data Engineer Experience level: At least 8 years of professional experience. Location: Warsaw, Poland Key technical requirements  Python Proficiency: Strong proficiency in Python, including writing clean, type hinted, scalable, and testable code. Strong focus on code quality, maintainability, and engineering best practices.  Backend And Data Pipelines Development: Proficiency to develop REST applications with FastAPI. Experience with databases (e.g. PostgreSQL). Experience with designing and implementing ETL pipelines.  Development Practices: Strong knowledge of Git version control. Experience with GitHub Actions and building CI/CD pipelines.  Cloud / Platform Requirements: Strong knowledge of Docker and application containerization. Good understanding of core AWS services, particularly AWS Glue, AWS Batch, ECS, S3, and ECR. Nice-to-have requirements  Observability: Basic knowledge of OpenTelemetry, including metrics, distributed tracing, logging, and observability best practices.  Platform & Security: Basic knowledge of Kubernetes and Helm Charts. Familiarity with OAuth 2.0 and modern authorization mechanisms.  Data & Architecture: Understanding of relational databases and data engineering best practices. Experience building cloud-native and microservices-based systems.  AI / Machine Learning: Interest in or experience working with AI/ML systems and LLM-based applications. Language requirements (language, proficiency level)  English: C1 proficiency level. Description of the project in which the service will be provided One of the projects is a RAG-based consumer assistant, the second one is focused on in-depth various types of document analysis and a chat-based interface. Both projects need further development and maintenance. Technologies utilized Python, AWS, Kubernetes, LLMs, Classical AI/ML. Team and work methodology Team is mostly Poland-based, a mix of Data Scientists and Machine Learning Engineers working in Agile. The size of the team is currently 8 people including the PM.