Senior Python Developer

### **About us:** Talent has no borders. Proxify's mission is to connect top developers around the world with opportunities they deserve. So, it doesn't matter where you are; we are here to help you fast-track your independent career in the right direction. 🙂 Since our launch, Proxify's developers have successfully worked with 1200+ happy clients to build their products and growth features. 5000+ talented developers trust Proxify and its network to fulfill their dreams and objectives. Proxify is shaped by a global network of supportive, talented developers interested in remote full-time jobs. Our Glassdoor (4.5/5) and Trustpilot (4.8/5) ratings reflect the trust developers place in us and our commitment to our members' success. ### **The Role:** We are looking for a Senior Python Developer specializing in FastAPI on behalf of one of our high-growth clients to architect, build, and scale their core cloud-native backend services. In this role, you will take ownership of developing high-throughput, low-latency asynchronous APIs that power data-intensive platform features.You are a perfect candidate if you are growth-oriented, you love what you do, and you enjoy working on new ideas to develop exciting products. #### **What we’re looking for:** * 3+ years of dedicated, hands-on production experience building high-performance asynchronous web services with FastAPI and modern Python (3.10+). Deep mastery of Python's asyncio ecosystem, dependency injection, and Pydantic v2 data validation. *  5+ years of total software engineering experience designing, deploying, and maintaining production-grade distributed systems and RESTful APIs. * Solid proficiency with relational databases (PostgreSQL), writing optimized raw SQL or leveraging ORMs like SQLAlchemy and Alembic for schema migrations and query tuning. Caching layer experience with Redis is essential. * Practical experience building decoupled services using message queues and event streaming platforms (e.g., RabbitMQ, Celery, or Apache Kafka). * Strong daily proficiency with Docker, Kubernetes or AWS container services (ECS/EKS), and setting up CI/CD deployment pipelines (GitHub Actions, GitLab CI). * Strict adherence to software design patterns, clean code principles, and comprehensive automated testing using pytest. * Located in the CET timezone (+/- 3 hours), we are unable to consider applications from candidates in other time zones. #### **Nice-to-Have** * Experience with GraphQL or WebSocket integrations alongside standard REST protocols. * Familiarity with vector databases (Pinecone, Milvus, Qdrant) or AI/LLM orchestration frameworks (LangChain, LlamaIndex) for AI-integrated backends. * Experience migrating legacy Django or Flask monolithic architectures to decoupled FastAPI microservices. #### **Responsibilities:** * Design, build, and document secure, high-concurrency microservices and RESTful endpoints using FastAPI and OpenAPI/Swagger standards. * Profile asynchronous bottlenecks, manage event loops, optimize database queries, and scale caching layers to maintain sub-millisecond response times under peak load. * Build robust communication channels between internal services and external partner APIs using webhooks, message brokers, and background workers (e.g., Celery). * Lead technical design discussions, establish testing benchmarks, and conduct thorough peer code reviews to ensure system reliability and security compliance. * Collaborate closely with DevOps teams to containerize applications, monitor cloud health metrics, and streamline automated release cycles. ### **What we offer:**   **Get paid, not played** No more unreliable clients. Enjoy on-time monthly payments with flexible withdrawal options. **Predictable project hours** Enjoy a harmonious work-life balance with consistent 8-hour working days with clients. **Flex days, so you can recharge** Enjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify. **Career-accelerating positions at cutting-edge companies** Discover exclusive long-term remote positions at the world's most exciting companies. **Hand-picked opportunities, just for you** Skip the typical recruitment roadblocks and biases with personally matched positions. **One seamless process, multiple opportunities** A one-time contracting process for endless opportunities, with no extra assessments. **Compensation** Enjoy the same pay, every month with positions landed through Proxify.