Back End Developer
1 day ago
London
Senior Backend Software Engineer A rapidly scaling, AI-driven health-tech organisation (Series A funded) is hiring an experienced Senior Backend Engineer to help build and scale the backend infrastructure powering cutting-edge clinical knowledge tools used by hundreds of thousands of clinicians globally. This is a role with significant ownership, impact, and influence — working in a small, highly capable team of clinician-engineers at the forefront of AI in healthcare. The Opportunity You will design, build, and optimise cloud-first backend systems, with a strong emphasis on AWS Serverless, LLM-powered workflows, and highly reliable production infrastructure. This is the chance to help define how AI is safely deployed in frontline clinical environments. Tech Stack (Highly Desirable) • AWS (Lambda, API Gateway, Cognito, S3, OpenSearch), • Node.js / TypeScript & Python, • DynamoDB & PostgreSQL, • Serverless & microservices architecture, • Terraform, Docker, CI/CD, • Security/Compliance (HIPAA, GDPR, NHS DTAC, SOC2) What You’ll Do • Build highly scalable backend services and APIs, • Work on LLM-powered features (RAG pipelines, embedding workflows), • Develop agentic document extraction systems for clinical PDFs, • Own backend reliability, performance, and security, • Work cross-functionally with product, frontend, and leadership, • Write clean, well-tested, maintainable code What You’ll Bring • 5+ years’ experience in production backend engineering, • Strong AWS proficiency, • Experience designing scalable, cloud-native systems, • Pragmatic problem-solver with a high bar for quality, • Experience in smaller teams/startups is highly advantageous Why This Role? You’ll join just as the engineering organisation is scaling - meaning real influence, major technical ownership, and the ability to help shape backend infrastructure that will impact healthcare worldwide. This is not a normal engineering role - it’s mission-driven, fast-paced, and incredibly meaningful with a great salary and stock options Apply via LinkedIn Easy Apply