fastapi developer

31C provides high-performance backend solutions and data processing services for enterprise and telecom sectors.

• Design and develop high-performance backend services using Python and FastAPI;
• Build highly concurrent applications utilizing asyncio and asynchronous programming patterns;
• Develop and optimize RESTful APIs using FastAPI, Uvicorn, and Gunicorn;
• Process and transform large datasets efficiently using Apache Arrow (PyArrow);
• Design, optimize, and maintain analytical workloads using ClickHouse;
• Build scalable, containerized applications deployed on Kubernetes;
• Optimize application performance, memory usage, and I/O for high-throughput environments;
• Implement monitoring, logging, health checks, and observability for production systems;
• Collaborate with infrastructure and platform teams to improve deployment automation and system reliability;
• Participate in architecture design, code reviews, and technical decision-making.

• 5+ Years of professional Python backend development experience;
• Extensive experience with asynchronous programming using asyncio;
• Strong expertise with FastAPI and production deployments using Uvicorn and Gunicorn;
• Experience with Apache Arrow (PyArrow) for high-performance in-memory data processing;
• Knowledge of columnar data formats (Arrow, Parquet) and efficient data serialization;
• Experience building scalable RESTful APIs and backend services;
• Hands-on experience with ClickHouse for analytical or high-volume data workloads;
• Experience deploying and operating applications on Kubernetes (K8s);
• Strong understanding of distributed systems, scalability, and performance optimization;
• Experience with Docker, CI/CD pipelines, automated testing, and modern software development practices;
• Nice to have: Experience with streaming or event-driven architectures, familiarity with observability tools such as Prometheus, Grafana, and OpenTelemetry, experience working with large-scale analytics, telemetry, or telecom platforms, understanding of distributed computing, parallel processing, and high-availability system design.

• 4000 EUR per month (B2B / Net).