Senior Full-Stack Engineer, Applied AI

November 20

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hims & hers

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Healthcare Insurance • eCommerce • Wellness

Hims & Hers is an online platform with over 1 million subscribers that connects patients to licensed healthcare professionals across all 50 states in the U. S. The service offers comprehensive support for sexual health, weight loss, hair regrowth, mental health, and skincare through a 100% online process. Clients can receive personalized treatment plans which may include prescription medications, and benefit from free and discreet shipping. Hims & Hers prides itself on providing accessible and affordable healthcare without the need for insurance, offering transparent pricing and support from licensed providers. It aims to empower individuals by making healthcare and treatment conveniently available on their own terms, including mental health support, which includes treatments for anxiety and depression.

201 - 500 employees

Founded 2017

⚕️ Healthcare Insurance

🛍️ eCommerce

🧘 Wellness

📋 Description

• Design and build scalable AI workflow systems — including orchestration runtimes, SDKs, and observability pipelines that power real-time, intelligent experiences. • Develop end-to-end features using TypeScript (Cloudflare Workers, React/Next.js) and Python (Databricks, evaluation, data processing). • Integrate and evaluate large language models (LLMs) and other ML systems (OpenAI, Anthropic, Vertex, Databricks) via a unified AI Gateway. • Build tool connectors and APIs for our internal domains — EHR, Pharmacy, Payments, Orders, Care — enabling safe and automated cross-system workflows. • Develop evaluation and feedback systems that measure quality, grounding, latency, and safety of AI-powered flows. • Partner closely with AI, Product, and Infra teams to design, prototype, and iterate quickly — turning research into production capabilities. • Contribute to shared TypeScript and Python SDKs that standardize event schemas, tool contracts, and developer experience across Applied AI. • Ensure everything you build meets security-by-design and privacy-first principles, supporting HIPAA and compliance requirements. • Foster a build → measure → learn culture by testing fast, gathering feedback, and continuously improving the system.

🎯 Requirements

• 4+ years of professional full-stack experience, spanning backend APIs, frontend apps, infra, and data systems. • Proficient in TypeScript (Node.js, React) and Python (data pipelines, ML evaluation, orchestration). • Familiarity with LLM- or ML-based systems, including prompt orchestration, evaluation harnesses, or RAG pipelines. • Experience with workflow orchestration tools • Understanding of system design for AI workloads — including state management, retries, idempotency, and performance optimization. • Experience with data/ML infrastructure (Databricks, AWS, vector stores, or BigQuery). • A bias toward action and iteration — you build fast, validate ideas early, and improve based on results. • Collaborative mindset, with strong communication skills. • Awareness of AI lifecycle management — from experimentation and evaluation to safety and deployment.

🏖️ Benefits

• 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