Senior Backend Engineer – Python/FastAPI, AWS, AI
Posted
Summary
Oscar Associates Limited is hiring a Senior Backend Engineer in London to build scalable SaaS platforms. Day to day: designing REST and async services in Python 3.11/FastAPI with PostgreSQL, working across Java/Spring boundaries, enforcing tenant isolation and testing, and deploying on AWS (EKS/ECS, RDS, S3) with OpenTelemetry observability.
Oscar Associates Limited is hiring a Backend Engineer to build scalable SaaS platforms from London. You will design REST and asynchronous services in Python 3.11 with FastAPI, interfacing across Java/Spring boundaries and PostgreSQL persistence.
You’ll ensure tenant isolation, access control and robust testing, while deploying on AWS (EKS/ECS, RDS, S3) and integrating OpenTelemetry/logging.