Backend Engineer
Infinitus Systems • San Francisco, California , U.S.AHelp 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 Backend 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 influence technical direction and mentor teammates.
Your Impact
Design, build, and maintain scalable backend services and APIs that power Eva’s healthcare interactions.
Collaborate closely with Data Science, Frontend, and Infrastructure teams to bring AI and NLP solutions into production.
Make technical tradeoffs to balance impact, user experience, and long-term scalability.
Champion engineering best practices, including reducing technical debt and improving reliability.
Mentor junior engineers and contribute to growing a high-performing engineering culture.
Partner with product managers, designers, and analysts to deeply understand user needs and deliver impactful solutions.
Contribute to both short- and long-term technical roadmaps.
Your Skillset
7-10+ years of backend engineering experience, with a track record of shipping and scaling production systems.
Strong expertise in backend languages (e.g., Go, Python, Java, C++).
Hands-on experience with cloud services (AWS, GCP) and modern DevOps practices.
Solid foundation in designing APIs and integrating backend services.
Deep understanding of database technologies (SQL and NoSQL), with experience optimizing performance.
Curiosity about ML/NLP concepts and interest in applying them at scale.
Strong cross-functional communication skills and experience collaborating in multidisciplinary teams.
Entrepreneurial mindset: thrive in ambiguity, take initiative, and drive projects end to end.
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 to hear from Infinauts about what we’re building
Discover how our company values (CODES) guide us
Follow our CEO, Ankit Jain, 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.