Backend Engineer (Early Career)

Infinitus Systems • San Francisco, CA

4d • Hybrid

About The Position

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.
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.
We’re looking for an early career Backend Engineer to join our team and help us build and scale the core of our digital health products. As our system grows to support more customers, expand the capabilities of Eva (our digital health assistant), and automate key processes in healthcare, we need engineers who are excited to learn, grow, and make an impact.
This is a role where you’ll be hands-on with backend systems, collaborate across teams, and develop the skills to become a strong, well-rounded engineer. If you’re curious about AI, NLP, and healthcare at scale, this is a great place to deepen your expertise while contributing to meaningful products.

Requirements

• 2–3 years of backend development experience, with demonstrated learning and growth.
• Proficiency in at least one backend language (Python, Go, Java, C++ or similar).
• Basic knowledge of databases (SQL & NoSQL) and API design.
• Experience with cloud services (AWS, GCP, or similar).
• Curiosity about AI/ML concepts and healthcare applications (no prior expertise required).
• Strong communication and collaboration skills.
• A growth mindset: open to feedback, eager to learn, and motivated to take on new challenges.
• Alignment with our values: Customer Obsessed, Optimistic, Disagree + Commit, Engage Employees, See–Say–Do.

Responsibilities

• Build and maintain backend services that power our healthcare products.
• Help design and develop scalable APIs and integrations.
• Collaborate with data science, frontend, and infrastructure engineers on end-to-end solutions.
• Write clean, testable, and maintainable code with guidance from senior engineers.
• Participate in code reviews, technical discussions, and roadmap planning.
• Gain experience in performance optimization, reliability improvements, and scaling systems.
• Work with AI coding tools (Cursor, Claude Code, etc.)
• Work with product managers and designers to understand user needs and deliver real customer value.
• Learn best practices in backend engineering and grow into increasing ownership over time.

Benefits

• 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 This Job Offers

• Job Type: Full-time
• Career Level: Entry Level
• Education Level: No Education Listed