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Senior Python Developer (FastAPI) at Proxify. Location Information: CET (+/- 3 hours). 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.