Full Stack Engineer — Legion Health (Y Combinator startup, Remote, Argentina)

About Legion Health

Legion Health is a pioneering telepsychiatry company dedicated to transforming patient care through advanced technology. We leverage cutting-edge language models and robust data analytics to enhance patient-provider interactions, improve access to mental health services, and streamline clinical operations. Our mission is to integrate innovative AI solutions into every facet of psychiatric care, ensuring both providers and patients benefit from the most effective and efficient treatment strategies.

About the Role

Skills

TypeScript, Node.js, PostgreSQL, Redis, Azure, Google Cloud, AWS

Mission

We are revolutionizing telepsychiatry through a core AI infrastructure that enables a vastly improved patient experience and quality of mental health care. We are actively improving our services in ingesting, chunking, embedding, caching, and searching to achieve this goal. Our technical goals include:

• Enhanced processing: Implement robust data structures and caching mechanisms to handle increasing volumes of language data spanning every facet of patients’ care while minimizing latency and maximizing system responsiveness.
• System scalability: Ensure our systems can scale effectively to support growth from one million to hundreds of millions of data points.
• Securing sensitive data: Uphold the highest standards of data security and privacy in compliance with HIPAA guidelines.

We are seeking a Senior Engineer (backend-focused) who will:

• Lead the development and optimization of our backend architecture.
• Implement and manage scalable and secure APIs and database schemas.
• Collaborate on integrating agentic LLM models to enhance our services.
• Communicate technology strategy to stakeholders and contribute to a culture of technical excellence.

Outcomes

• System Performance: Achieve system scalability to handle tenfold data growth while maintaining or improving response times for our heavily LLM-dependent services.
• Data Security: Implement solutions that fully comply with HIPAA and ensure zero breaches.
• Innovation in Telepsychiatry: Introduce new functionalities that leverage language models to improve patient outcomes and operational efficiency.

Skills

Soft Skills

• Problem Solving: You are adept at identifying and resolving complex technical issues.
• Innovation: You actively propose and implement solutions that push the boundaries of traditional healthcare IT.
• Collaboration: You effectively communicate and work with cross-functional teams to meet business and technology goals.
• Leadership: You are capable of guiding and inspiring a technical team towards achieving architectural and operational excellence.

Hard Skills

• Practical experience with or demonstrated deep interest in language model-first systems and solutions.
• Strong experience with backend technologies including TypeScript and Node.js.
• Expertise in designing and managing databases, particularly with PostgreSQL.
• Proficient in managing cloud services across Google Cloud, Azure, and AWS.
• Experience in implementing secure and scalable APIs.

Background

• A degree in Computer Science, Engineering, or a related field.
• 3–5+ years of experience in backend development, with a focus on scalable and secure systems.
• Proven track record in building and maintaining high-traffic, secure backend systems.

Technology

TypeScript, Node.js, PostgreSQL, Redis, Supabase, Azure, Google Cloud, AWS, LangChain, PostHog, Retool, React

Interview Process

• Phone interview with co-founder and CTO
• Technical Interview/Workshop: Deep dive into technical skills and problem-solving capabilities.
• Technical Case: Tackle a real-world problem related to our current technical challenges.
• Interview with Co-founders: Discuss vision, motivation, and fit.
• Interview with technical advisor
• 3 Reference Checks: Confirm past achievements and qualifications.