At Hims & Hers, we’re on a mission to help the world feel great through better health. We are looking for a Staff Full-Stack Engineer, Applied AI to lead the architecture and development of the platforms that power our AI-driven healthcare experiences. You will partner with product teams across Pharmacy, E-commerce, Care, and Core Platform to design and ship intelligent features for patients and internal operations, championing safety, privacy, and clinical integrity.
What You'll Do
- Design and own core AI workflow platforms, orchestration systems, and shared SDKs that power intelligent healthcare experiences.
- Build scalable, reliable systems for LLM orchestration, grounding, evaluation, and agent-like workflows.
- Create reusable frameworks and patterns that other engineering teams can adopt across the company.
- Drive multi-quarter technical initiatives and help bridge AI research prototypes with production-grade systems.
- Work with Pharmacy, E-commerce, Care, and Operations to bring AI-powered features to life, from patient-facing journeys to internal efficiency tools.
- Collaborate on product strategy, helping translate ambiguous ideas into clear technical plans.
- Support teams in releasing features quickly through incremental, high-velocity delivery cycles.
- Ensure user-facing AI experiences meet expectations for performance, reliability and usability.
- Develop evaluation frameworks and observability systems that measure AI behavior, grounding, safety, and quality.
- Establish guardrails and patterns that ensure all AI interactions comply with HIPAA, security-by-design, and privacy-first principles.
- Work with clinical, legal, and AI safety partners to ensure our systems are trustworthy and appropriate for healthcare use.
- Mentor engineers and help cultivate strong engineering practices across the Applied AI organization.
- Lead design reviews and contribute to architectural governance across engineering teams.
- Improve developer experience and remove platform bottlenecks that slow down product teams.
- Raise the overall quality bar by championing clear standards for reliability, observability, testing, and iteration.
- Develop features and infrastructure using TypeScript (AWS, Cloudflare Workers, React/Next.js) and Python (Databricks, orchestration, evaluation).
- Integrate and evaluate LLMs and ML systems through unified AI gateway.
- Build secure APIs and connectors that link to domains like EHR, Pharmacy, Payments, Orders, and Care.
- Contribute to shared libraries that standardize schemas, tool contracts, and developer experience.
What We're Looking For
- 8+ years of professional experience across backend services, frontend applications, distributed systems, and data/ML tooling.
- Strong proficiency in TypeScript and Python, with experience building production systems in both languages.
- Deep familiarity with LLM- or ML-based systems and the architectural patterns needed to operate them safely at scale.
- Experience leading major technical initiatives that span multiple teams or product areas.
- A product-driven mindset with a bias toward fast, incremental delivery and continuous learning.
- Strong communication and collaboration skills across engineering, product, design, operations, and clinical teams.
- A deep appreciation for safety, privacy, and security — ideally with experience in a regulated domain such as healthcare, fintech, or life sciences.
Nice to Have
- Experience with Databricks, Cloudflare Durable Objects, vector databases, or edge-based AI orchestration.
- Prior work on AI evaluation systems, LLM behavior monitoring, or safety frameworks.
- Contributions to open-source SDKs or complex infrastructure projects.
- Experience building tools that significantly increase developer velocity.
Technical Stack
- TypeScript, AWS, Cloudflare Workers, React, Next.js
- Python, Databricks
- LLMs, ML systems
Team & Environment
You will be part of a small, high-impact Applied AI team. You will partner closely with product teams across Pharmacy, E-commerce, Care, and Core Platform.
Benefits & Compensation
- Competitive salary & equity compensation for full-time roles
- Unlimited PTO, company holidays, and quarterly mental health days
- Comprehensive health benefits including medical, dental & vision, and parental leave
- Employee Stock Purchase Program (ESPP)
- 401k benefits with employer matching contribution
- Offsite team retreats
Hims considers all qualified applicants for employment, including applicants with arrest or conviction records, in accordance with applicable fair chance laws. We are committed to providing reasonable accommodations for qualified individuals with disabilities.
