# AI Full Stack Engineer

**Company:** [Infinitus](https://hotfix.jobs/companies/infinitus)
**Location:** San Francisco, CA
**Role:** Fullstack Engineering
**Experience:** 8+ years
**Skills:** React, TypeScript, Python, Go, Java, C++, AWS, GCP, SQL, NoSQL, LLMs, RAG
**Posted:** 2026-07-13

> Senior full-stack engineer building and scaling AI-powered healthcare products and Eva, the AI health assistant. Lead end-to-end delivery of user-facing features integrating LLMs, data pipelines, and backend services in a fast-paced startup.

## Job Description

## Your Impact
- Design, build, and scale AI-powered, user-facing products that make Eva’s healthcare interactions more intelligent, intuitive, and reliable.
- Lead the end-to-end delivery of complex full-stack product experiences, from frontend architecture and backend services to APIs, data integrations, and production workflows.
- Partner closely with Product, Design, Data Science, Infrastructure, and other engineering teams to bring AI capabilities into real user workflows in a practical, scalable, and measurable way.
- Translate ambiguous product and AI opportunities into clear technical plans, balancing speed, user experience, reliability, safety, and long-term maintainability.
- Build robust systems that connect application logic, data pipelines, model outputs, and human-centered product experiences.
- Evaluate and integrate AI technologies, including LLM-enabled workflows, retrieval systems, classification, summarization, automation, and decision-support experiences where appropriate.
- Establish strong frontend and backend engineering standards, including component architecture, API design, system reliability, observability, testing, and development best practices.
- Make high-quality technical tradeoffs across product impact, engineering complexity, scalability, and long-term platform health.
- Drive cross-team and cross-org alignment to ship high-impact work, influencing through technical clarity, judgment, and collaboration rather than authority.
- Mentor and grow engineers across the team, raising the bar for technical execution, product thinking, and engineering culture.
- Contribute to both short- and long-term technical roadmaps, especially around AI-enabled product development, platform scalability, and full-stack architecture.
- Help shape how Eva responsibly applies AI in healthcare workflows, with a focus on usefulness, trust, reliability, and excellent user experience.

## Your Skillset
- 8+ years of practical full-stack engineering experience.
- A track record of leading the design and delivery of complex consumer or B2B user-facing products across the full stack.
- Deep expertise in modern frontend and backend development, with strong proficiency in technologies such as React, TypeScript, Python, Go, Java, C++, or similar.
- Strong experience designing scalable APIs, backend services, data models, integrations, and distributed systems.
- Hands-on experience with cloud infrastructure and modern DevOps practices, ideally across AWS, GCP, or similar environments.
- Solid understanding of database technologies, including SQL and NoSQL systems, with experience optimizing for performance, reliability, and scale.
- Practical familiarity with AI-enabled product development, such as LLM integrations, model orchestration, prompt/system design, retrieval-augmented generation, evaluation workflows, or AI-assisted automation.
- Strong product judgment and a user-centered approach to building solutions that are robust, scalable, trustworthy, and easy to use.
- Experience working in early-stage startups or similarly fast-moving, rapidly evolving environments; ideally, you have built products from 0 to 1.
- Ability to navigate ambiguity, define technical direction, and deliver high-quality products in fast-paced environments.
- Demonstrated success driving cross-team or cross-org alignment to get impactful work shipped.
- Experience establishing engineering standards, component architectures, reusable patterns, and development best practices.
- Leads through mentorship, actively developing peers and junior engineers while fostering a collaborative, high-performing engineering culture.
- Entrepreneurial mindset: you take initiative, operate with ownership, and drive projects from concept through production impact.

## Nice to Have
- Experience building AI-powered products in healthcare, fintech, enterprise SaaS, or other high-trust domains.
- Experience with evaluation, monitoring, and reliability practices for AI systems in production.
- Familiarity with healthcare data, clinical workflows, privacy-sensitive systems, or regulated environments.
- Experience building internal platforms or tooling that accelerate AI product development across engineering teams.

## Similar roles

- [Senior Product Engineer](https://hotfix.jobs/jobs/55e42568-a150-4c64-b437-92030598ea6d) - Tennr - New York, NY - $190k – $215k/yr
- [Software Engineer, Claude Design](https://hotfix.jobs/jobs/0120dd17-4e02-4e4b-adf3-53b36087725b) - Anthropic - San Francisco, CA - $320k – $485k/yr
- [Senior Fullstack Product Software Engineer, Web Experience](https://hotfix.jobs/jobs/ed959687-0c49-49fb-a3df-8f9a326d9961) - Dropbox - Remote - $180k – $274k/yr
- [Senior Fullstack Engineer](https://hotfix.jobs/jobs/8aa7c1cb-47d0-482e-a3ba-744f47dd9a13) - Clarium - Remote - $140k – $190k/yr
- [Legal Systems Engineer](https://hotfix.jobs/jobs/6cdb474b-22bb-4f51-a5f9-a1f9eb50c517) - Square - San Francisco, CA - $126k – $189k/yr

**Apply:** https://hotfix.jobs/jobs/2c055202-044a-4a93-a40f-3ed351dce1ed
**Canonical:** https://hotfix.jobs/jobs/2c055202-044a-4a93-a40f-3ed351dce1ed