Mid-Level Python Developer (Backend)

Job description

About the Role We are looking for a Backend Engineer to build, maintain, and optimize high-concurrency backend systems for client projects. You will own features end-to-end, taking them from technical design to deployment. You will leverage modern async Python, strict type-safety, and AI-assisted workflows to ship resilient code fast. What You Will Do Feature Delivery: Own backend features end-to-end from schema design and API endpoints to production deployment. API & Core Development: Write clean, well-tested async Python code (e.g., FastAPI) and apply modern type-safety practices. Data & System Integration: Integrate backend services with relational databases (PostgreSQL, SQLAlchemy/SQLModel), caching layers, and asynchronous message queues. Smart Engineering: Integrate AI-assisted workflows (e.g., Cursor, GitHub Copilot) across your daily lifecycle to rapidly prototype, write boilerplate, expand test coverage, and debug faster. Quality & Reliability: Write comprehensive automated tests, optimize query performance, and ensure feature reliability in production. Team Collaboration: Work alongside cross-functional squads and client teams to refine technical specs, conduct code reviews, and ship software iteratively. What We Are Looking For Modern Python: Strong hands-on experience with Python 3.11+, including async programming (asyncio), typing, and REST API frameworks (e.g., FastAPI). Database & Data Modeling: Practical experience working with relational databases (e.g., PostgreSQL) and writing efficient SQL/ORM queries. Engineering Practices: Proven habits around automated testing (pytest), code quality, structured logging, and git-based workflows. Production Delivery: Experience shipping code to production, working with containers (Docker), and understanding basic deployment processes. Communication: Professional English fluency; ability to explain technical decisions clearly to teammates. Nice to Have Practical experience with AI coding tools (e.g., GitHub Copilot, Cursor), or openness to integrating them into your development habits. Knowledge of integrating AI/LLM components into backend workflows (e.g., LangChain, vector databases). Experience with message brokers (RabbitMQ, Kafka) or key-value stores (Redis). Familiarity with modern package managers, linters, and formatters (e.g., uv, Poetry, Ruff). Familiarity with cloud platforms (AWS, GCP, or Azure) and CI/CD pipelines. German language skills (B2+). Why Join Sopra Steria Bulgaria Global project experience with meaningful impact Continuous professional and personal development opportunities Approachable leadership and open communication Empowered teams driving #OneTeam success Benefits Competitive remuneration package Food vouchers 26 days of annual paid leave Comprehensive health, life, and travel insurance Extensive professional training programmes and up to 10 dedicated training days per year Multisport cards Modern office facilities are conveniently located at Metro Station G.M. Dimitrov Blvd. Selection Process We carefully review every application and will contact you within the following week if we identify a potential match. As we dedicate time to assessing each application thoroughly, we appreciate your patience throughout the process. Equal Opportunity At Sopra Steria Bulgaria, we are committed to creating an inclusive workplace where everyone is treated with respect. We welcome applications from people of all backgrounds and experiences. Transparent & Fair Assessment As part of our interview process, you may be asked to complete a job-related case study or practical assessment. Candidates are evaluated using standardized, role-specific criteria (Functional Expertise, Analytical Capability, Accountability, Stakeholder Interaction, and Collaboration) to ensure an objective, fair, and transparent selection process. Candidate Data Privacy Please read Sopra Steria's Candidate Data Protection Notice for more information about how we collect, process, and protect your personal data throughout the recruitment process. At our organization, we are committed to fighting against all forms of discrimination. We foster a work environment that is inclusive and respectful of all differences. All of our positions are open to people with disabilities. About Sopra Steria Bulgaria Sopra Steria Bulgaria is part of the Sopra Steria Group, one of Europe's top technology consulting companies. We partner with customers across Germany and the DACH region, delivering software engineering, digital transformation, and business consulting services through international teams and long-term customer partnerships. Joining us means being part of an international team where collaboration, knowledge sharing, and continuous learning are part of everyday work. The world is how we shape it. Let's shape it together.