Senior Backend Software Engineer with AI

Halcyon Labs is currently looking for an Senior Backend Software Engineer with AI for one of our partners, a multinational healthcare provider. About: Are you ready to build the primary care platform of the future by becoming an integral part of a dynamic team? If you also believe in the positive transformative power of technology in bringing primary care to the next level - join us! Responsibilities: Build and ship backend services as part of our microservice architecture, with AI agents and LLM-powered features as a core part of what you deliver Design and write MCP servers and tool interfaces that let agents reliably interact with our systems and APIs Develop agent harnesses, orchestration layers, and memory modules that give agents the context and state they need to act dependably Make deliberate design decisions about agent behavior Build evaluation frameworks and test harnesses to measure agent reliability, safety, and quality in a high-stakes healthcare context Integrate large language models into production with strong attention to latency, cost, and observability Raise the bar and drive technological innovations to keep us at the cutting edge Apply continuous integration and deployment principles Ensure code quality and maintainability by writing tests, doing code reviews, and refactoring Requirements Proven track record of backend software development with Java/Kotlin and/or Python, minimum of 5 years Hands-on experience building LLM-powered applications, agents, or agentic workflows (tool use, function calling, multi-step orchestration) Familiarity with major LLM APIs and frameworks (eg Anthropic, OpenAI, or similar) and an understanding of how to design tooling, MCPs, and memory for agents Experience designing and running evals or test harnesses for non-deterministic systems Experience with Spring Framework and messaging brokers such as RabbitMQ Solid understanding of SQL databases and developing containerized applications Experience with Kubernetes and Terraform is a plus A pragmatic mindset for shipping reliable software - and reliable AI - in a regulated, high-stakes domain English working proficiency Work Setup: Flat hierarchies and a collaborative working environment. Attractive compensation package. Option for remote work. Flexible working hours with a high degree of personal responsibility. Originally posted on Himalayas