Senior Full Stack Engineer

Linus Health is a Boston-based digital health company transforming brain health worldwide. They are seeking a Senior Full Stack Engineer to design and build core systems for their AI-enabled healthcare platform, collaborating with various teams to deliver scalable solutions.

Responsibilities:

• Design and build full-stack platform capabilities using React + TypeScript and backend services in Node.js (TypeScript), Python, or Java
• Own the architecture and delivery of complex features and services, ensuring scalability, reliability, and maintainability
• Design and evolve RESTful APIs and distributed systems supporting the Linus Health platform
• Lead technical design discussions and help guide architectural decisions across teams
• Collaborate closely with Product, Design, Data Science, and Clinical teams to translate complex requirements into elegant technical solutions
• Leverage AI-assisted development tools to accelerate engineering workflows and improve developer productivity
• Prototype and evaluate LLM-enabled product capabilities and agent-style workflows
• Mentor and support other engineers through code reviews, design discussions, and knowledge sharing
• Help establish and maintain engineering standards for testing, reliability, observability, and CI/CD pipelines
• Identify and address technical debt and system improvements to maintain long-term platform health

Requirements:

• 7+ years of software engineering experience building production systems
• Strong experience with React and modern frontend development, ideally using TypeScript
• Significant experience building backend services or APIs using Node.js, Python, or Java
• Deep understanding of web architecture, distributed systems, and API design
• Experience designing and delivering complex systems or large features end-to-end
• Experience working with AI-assisted development tools or modern developer productivity tooling
• Familiarity with LLM-based systems, automation workflows, or simple agent frameworks
• Strong engineering discipline around testing, debugging, and maintainable code
• Excellent communication and collaboration skills across technical and non-technical teams
• Experience integrating LLM APIs or AI-enabled product features
• Familiarity with agent frameworks such as LangChain, LangGraph, or CrewAI
• Experience with cloud-native infrastructure, particularly AWS
• Experience with microservices architectures or backend-for-frontend (BFF) patterns
• Experience developing mobile applications using React Native, Swift, or other modern mobile frameworks
• Experience working in digital health or regulated environments (HIPAA, SOC 2, etc.)
• Exposure to data platforms, analytics systems, or machine learning pipelines