---
title: 'AI Full Stack Engineer at Infinitus Systems'
canonical: 'https://feeny.ai/job/ai-full-stack-engineer-infinitus-systems-san-francisco-m6dhphktgftz'
type: 'job'
last_seen: '2026-09-12'
---

# AI Full Stack Engineer at Infinitus Systems

- **Company:** Infinitus Systems
- **Location:** San Francisco, CA
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-07-13
- **Last confirmed live:** 2026-09-12
- **Apply:** https://jobs.ashbyhq.com/infinitus/56b14fe7-5a07-48c5-bb07-28b625c576fd

## Job description

Help Build the Future of Healthcare AI

Infinitus is AI communications in service of patients. Healthcare is inherently complex and siloed. We’re pioneering agentic communications to connect the entire system — any stakeholder, any channel, inbound and out. The result is intelligent care that reduces patient anxiety, increases speed to treatment, and enables teams to scale impact without stretching resources. Our system combines industry-leading safety guardrails with the largest dynamic knowledge graph built on millions of real-world interactions. It’s why 44% of the healthcare Fortune 50 trusts Infinitus to turn fragmented touchpoints into seamless care for better patient outcomes.

The Mission At Infinitus, our mission is simple: create time for healthcare by making access, adherence, and affordability easier than ever. We’ve automated over 7 million calls and 100M+ minutes of conversation — saving millions of hours for patients and providers. Backed by over $100M from top investors including Google Ventures, Kleiner Perkins, Andreessen Horowitz, and Coatue, we’re a team that challenges the status quo and moves fast at the intersection of AI and healthcare. Infinitus was recently named to Fast Company's World's Most Innovative Companies and Business Insider’s top startups in healthcare.

## Your Role

We are looking for a senior Fullstack Software Engineer to help us design, build, and scale the core of our digital health platform. You’ll work on expanding the capabilities of Eva, our AI-powered health assistant, and build systems that automate and simplify healthcare administration at scale. This role blends hands-on backend development with opportunities to lead and influence technical direction and mentor teammates.

## 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.

## Why You’ll Love It Here

Please Note: the following benefits are for salaried employees

- Hybrid work (SF office Mon/Tues/Thurs) + catered lunches (Bay Area Positions only)
- Competitive salary, equity, and 401(k)
- Wellness stipend & great benefits (medical, dental, vision)
- Generous PTO & parental leave
- Bi-annual offsites & a collaborative, mission-driven culture

What to Expect in the Interview Process

- Apply & meet our recruiting team
- Virtual interviews to showcase your skills
- Final onsite loop to meet the team and get to know us better
- Chat with our CEO

Curious to Learn More?

- Read our [Blog](https://www.infinitus.ai/blog/) to hear from Infinauts about what we’re building
- Discover how our company values ([CODES](https://www.infinitus.ai/careers/)) guide us
- Follow our CEO, [Ankit Jain](https://www.linkedin.com/in/jainankit/recent-activity/all/), for industry updates

We’re building AI agents that tackle healthcare’s toughest problems and open new possibilities. Ready to join us? Let’s talk! ​​Infinitus Systems is committed to providing an environment of mutual respect where equal employment opportunities are available to all applicants and teammates without regard to race, color, religion, sex, pregnancy (including childbirth, lactation and related medical conditions), national origin, age, physical and mental disability, marital status, sexual orientation, gender identity, gender expression, genetic information (including characteristics and testing), military and veteran status, and any other characteristic protected by applicable law. Infinitus Systems believes that diversity and inclusion among our teammates is critical to our success as a global company, and we seek to recruit, develop and retain the most talented people from a diverse candidate pool.

## About Infinitus Systems

## Company Overview
- **One-liner**: Infinitus builds an agentic AI platform that automates clinical and administrative phone calls and digital communication between patients, providers, and payors to remove friction from the healthcare journey.
- **Entity Type**: Private (Series C)
- **Headquarters**: San Francisco, California, United States
- **Founded**: 2019
- **Founders**: Ankit Jain (CEO) and Shyam Rajagopalan (Technology Lead)

## Core Business
- **Primary industry**: Healthcare AI / Healthcare Communications
- **Target customers**: Pharmaceutical companies, specialty pharmacies, payors (health insurers), and health systems (enterprise B2B)
- **Mission statement**: "Engineering better health outcomes for everyone" by making healthcare "wait-less" – reducing administrative burden so patients can access care faster.

## Products & Services
- **Infinitus AI Agents (Platform)**: AI-powered voice and digital agents that handle routine healthcare communication tasks – benefit verification, prior authorization follow-ups, patient enrollment, copay card monitoring, refill coordination, and proactive adherence check-ins. The agents work across channels and can be deployed quickly with guardrails for compliance. [infinitus.ai](https://www.infinitus.ai/)
- **Studio**: A no-code AI agent builder that enables healthcare teams to design, test, deploy, and refine custom AI agents without writing code. Claims 40% more accuracy and 90% faster deployment versus alternatives. [infinitus.ai](https://www.infinitus.ai/)
- **Lens**: A conversation analytics tool that evaluates every patient, provider, and payor interaction (both human- and AI-led) across channels. Features include 15x faster analysis, 100% detection of potential adverse events, and scoring of conversations in under 5 minutes. [infinitus.ai](https://www.infinitus.ai/)
- **Pharma Patient Access Solution**: Specialized automation for pharma patient support programs – enrollment, benefit verification, prior authorization, financial assistance navigation – to reduce time-to-therapy. [cbinsights.com](https://www.cbinsights.com/company/infinitus-systems)

## Market Standing
- **Valuation**: Not publicly disclosed
- **Total Funding**: $102.9M raised to date (last round: $51.5M Series C, raised ~2024) [cbinsights.com](https://www.cbinsights.com/company/infinitus-systems)
- **Notable Investors/Partners**: Andreessen Horowitz (a16z – Ilya Fushman on board), Kleiner Perkins (Scott Kupor, partner), Google Ventures (Krishna Yeshwant, partner). Board advisors include John Driscoll (formerly President US Healthcare at Walgreens). [infinitus.ai](https://www.infinitus.ai/company/about-us/)
- **Key Metrics**:
  - 100M+ minutes of conversation automated across clinical and administrative workflows [infinitus.ai](https://www.infinitus.ai/)
  - 8M+ calls completed [infinitus.ai](https://www.infinitus.ai/)
  - Supporting 125,000+ providers [infinitus.ai](https://www.infinitus.ai/)
  - 44% of the Fortune 50 supported by Infinitus [infinitus.ai](https://www.infinitus.ai/)
  - 8 out of 10 of the top pharmaceutical manufacturers are customers [infinitus.ai](https://www.infinitus.ai/company/about-us/)
- **Growth Signals**: Major enterprise adoption among largest healthcare organizations; continuous expansion of AI agent capabilities (e.g., new Clinical Escalations feature). High-profile board and investor backing indicates strong confidence.

## Competitive Advantages
- **Purpose-built for healthcare**: Unlike general-purpose AI call centers, Infinitus agents are designed with healthcare-specific guardrails, compliance (HIPAA, PHI), and integration with payor/provider systems.
- **Proven scale**: Already handling millions of calls and serving the majority of the largest pharma companies and nearly half the Fortune 50 – a high bar for new entrants.
- **Full-stack platform**: Combines conversational AI, analytics (Lens), and a no-code builder (Studio) into one platform, making it easier for healthcare teams to own and iterate on workflows.
- **Ecosystem connections**: Agents communicate with payors, patients, and providers as a unified system, reducing fragmented point solutions.

## Strategic Focus
- **Depth over breadth**: Deepening automation across the patient journey – from pre-therapy access to long-term adherence. The recent "Clinical Escalations" feature signals a move into real-time clinical risk detection.
- **Platform expansion**: Growing Studio and Lens to make the platform self-service and insight-rich for customers, driving stickiness and faster deployment.
- **Enterprise sales**: Leveraging existing large pharma and health system relationships to cross-sell additional agent types and analytics capabilities.
- **Maintaining trust**: Emphasizing accuracy (40% more accurate), reliability, and human-in-the-loop design to ensure healthcare leaders feel safe adopting AI agents.

## Why Work Here
- **Culture & Values**: Named a Certified "Great Place to Work" three years in a row – 90% of employees say it’s a great place to work (vs. 57% U.S. average). Core values are summed up as "CODES": Customer obsessed, Engage employees, Disagree + commit, See say do, Optimistic realists. [infinitus.ai](https://www.infinitus.ai/careers/)
- **Work Model**: Hybrid – San Francisco office (Brannan Street) with in-office days Monday, Tuesday, Thursday for most roles. Remote options available for GTM and Operations teams. [infinitus.ai](https://www.infinitus.ai/careers/)
- **Perks & Benefits**:
  - Medical, dental, vision insurance (United Healthcare PPO plans, Kaiser HMO for CA residents; $0 mental health copay for in-network)
  - 401(k) plan (Human Interest, eligible day 30)
  - Flexible PTO plus 8 company holidays
  - Paid parental leave for birth, adoption, or foster placement
  - Quarterly equipment + wellness stipend (for home office or physical/mental health)
  - Annual company and team offsites for in-person connection
- **Engineering Culture**: Focus on building reliable, compliant AI at scale. The company encourages ownership ("See, say, do") and healthy debate. Employees are mission-driven around improving healthcare outcomes.

## Sources
1. [infinitus.ai](https://www.infinitus.ai/) – Product overview, metrics, customers
2. [infinitus.ai](https://www.infinitus.ai/careers/) – Careers page, culture, perks, work model
3. [infinitus.ai](https://www.infinitus.ai/company/about-us/) – Leadership, board, investors, mission, milestones
4. [cbinsights.com](https://www.cbinsights.com/company/infinitus-systems) – Funding, founding date, total raised, customer examples
5. [linkedin.com](https://www.linkedin.com/company/infinitusai) – LinkedIn profile (year founded, company size)

## Other roles at Infinitus Systems

- [HR Business Leader](https://feeny.ai/job/hr-business-leader-infinitus-systems-san-francisco-5p628wyrgvxf) — San Francisco, CA
- [Customer Success Manager](https://feeny.ai/job/customer-success-manager-infinitus-systems-remote-v0w668vm2pqz)
- [Lead Product Manager, AI Hub](https://feeny.ai/job/lead-product-manager-ai-hub-infinitus-systems-san-francisco-692qeghp2v07) — San Francisco, CA
- [Vendor & Resource Manager](https://feeny.ai/job/vendor-resource-manager-infinitus-systems-remote-5e472jh7h4t0)
- [Forward Deployed Engineer](https://feeny.ai/job/forward-deployed-engineer-infinitus-systems-california-ss9z1zpyecjf) — California
- [Implementation Manager](https://feeny.ai/job/implementation-manager-infinitus-systems-remote-sszghek0w6j3)
- [Data Analyst](https://feeny.ai/job/data-analyst-infinitus-systems-san-francisco-ng9b5eqs06wq) — San Francisco, CA
- [National Account Executive](https://feeny.ai/job/national-account-executive-infinitus-systems-remote-t03rjxmjrs7g)
- [AI Full Stack Engineer](https://feeny.ai/job/ai-full-stack-engineer-almedia-berlin-961q8qds6wcz) — Berlin, Germany
- [AI Full Stack Engineer](https://feeny.ai/job/ai-full-stack-engineer-boomi-united-states-of-z8t9n3x2fss4) — United States of, United States