Senior Full Stack Engineer

Linus Health

About The Position

Linus Health is a Boston-based digital health company transforming brain health worldwide. We combine cutting-edge neuroscience, clinical expertise, and AI to advance early detection and intervention for cognitive and brain disorders—empowering people to live longer, healthier lives. With 100+ team members and growing, we’re entering a phase of accelerated growth and looking for experienced engineers who want to help build the next generation of AI-enabled healthcare platforms. We’re looking for a Senior / Staff Full-Stack Software Engineer to help design and build the core systems that power the Linus Health platform. In this role, you will work across modern frontend applications, backend services, and emerging AI-enabled workflows, helping shape the architecture and technical direction of key platform components. You’ll partner closely with Product, Design, Data Science, and Clinical teams to deliver scalable systems that support clinicians, researchers, and health systems. This role is ideal for an engineer who enjoys solving complex system problems, mentoring other engineers, and influencing architecture decisions while remaining hands-on in code. Please note that you must be based in the United States to be considered for this position. We kindly as that you refrain my applying if you are not based in the US. Unfortunately we are not able to provide sponsorship at the moment.

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.

Nice To Haves

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.

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.