Staff Software Engineer (Full Stack)

About Onos Health

Onos Health’s mission is simple but ambitious: ensure every healthcare dollar goes toward delivering the highest quality care. Today, 30% of total U.S. healthcare spending is wasted due to ineffective care and administrative burden caused by misalignment between providers and payers.

Onos is addressing this by building the largest AI-driven healthcare data platform. Our models enables payers to make faster, more accurate decisions across their populations. By guiding members to the right care, Onos is channeling more dollars to high-quality care that drives outcomes while making healthcare more affordable.

Onos recently closed a $6M Seed round with top-tier investors and is already working with some of the nation’s largest health plans, signing its first national plan just months after launch.

Come join a category-defining company and help reimagine healthcare for the better.

Why Onos?

• Meaningful impact: Help fix what is fundamentally broken in healthcare

• Direct collaboration: Work alongside experienced founders with deep healthcare and data expertise

• Culture: Join a high-performing, transparent, and results-oriented team

• Ownership: Significant responsibility and autonomy from day one

• Opportunity: Play a pivotal role in building a fast-growing, category-defining healthcare AI company

The Role

We're seeking an experienced and highly capable full-stack product engineer who is motivated to meaningfully improve the way healthcare is administered in the United States. You'll take ownership of developing a significant part of the Onos platform, such as our user-facing application and APIs. As an early team member, you'll be expected to wear multiple hats, including acting as a frontend developer, UI/UX designer, and backend developer. This role is a hybrid role based in San Francisco, where you'll be expected to work at our office in person at least once a week.

What you'll be doing at Onos:

• Leading the development for our end-user web application, used by healthcare administrators and providers

• Architecting and implementing major platform components to provide actionable insights and recommendations to health plan administrators and support robust workflows related to addressing fraud, waste, and abuse

• Prototyping new features and use cases for demos and user feedback

• Establish engineering best practices and technical foundations for future team growth and AI-enabled coding

• Help shape our technical roadmap, make key architectural decisions, and influence the company's product and design strategy

Technical Challenges At Onos:

• Develop a flexible and robust UI/UX that supports many types of use cases and data sources related to administrative healthcare workflows and include intelligent, actionable insights.

• Implement functionality related related to machine learning pipelines that ingest complex medical standards, analyze medical records and automate recommendations for clinical reviewers

• Incorporate human-centric AI user experiences, in which the UI/UX enables users to build trust with the use of AI in our products

• Design and implement high quality user experience while upholding high security and privacy standards

Tech Stack:

• At Onos, we work with a modern tech stack where you'll have the freedom to evaluate and adopt cutting-edge technologies as we scale.

• Languages/Frameworks:

  • Frontend: Typescript, NextJS, Tanstack Query, Shadcn UI, Zod, Nuqs

  • Backend: Python, Django, django-ninja, django-tenants

• Database/Storage: PostgreSQL (AWS RDS), S3

• Infrastructure/Systems: AWS (ECS, Bedrock, Cognito, etc.), Docker, Github Actions

• Development Tools: Github, Jira, CoderabbitAI, Tusk

What we're looking for:

• 5+ years professional experience building end-user web applications at product-driven companies

• Proficient with web and backend technologies (e.g., React, Python) and relational databases (e.g., PostgreSQL/MySQL)

• Customer obsessed and motivated to make an impact in the healthcare space

• High user empathy and the ability to develop frontend UI/UX with minimal guidance

• A collaborative team player with attention to detail

Bonus points if you have:

• Significant experience working with healthcare data and with HIPAA best practices

• Developed design systems and made frontend codebases maintainable

• Played the role of an architect on major full stack software projects

Benefits and Perks

• Flexible hybrid arrangement: 2-3 days/week at San Francisco office (financial district), remote-first culture

• Unlimited vacation policy

• Paid parental leave

• Medical, dental, and vision insurance

• Pre-tax commuter benefits

• 401(k)

• Significant equity as an early employee

• Ground-floor opportunity to help build a team and culture

• Regular team events and offsites

• Company-provided equipment and home office setup

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.