Principal Software Engineer (Backend)

Position Overview

At Onos Health, our mission is to ensure every healthcare dollar goes toward delivering the highest quality care. We are building the largest AI-driven healthcare data platform to help payers make faster, more accurate decisions. With a recent $6M round from top-tier investors and partnerships with some of the nation’s largest health plans, we are poised to reimagine healthcare for the better.

We're seeking a capable technical leader who will take ownership of developing a significant part of the Onos platform through hands-on development and technical leadership. In this hybrid role based in San Francisco, you’ll work closely with our founding team while building and leading a growing engineering team.

Key Responsibilities

• Architect and implement major platform components to provide actionable insights for health plan administrators.
• Develop robust integrations with healthcare systems and build scalable data pipelines for health records, provider directories, and claims processing.
• Collaborate with ML/LLM engineers to build and optimize models for behavioral and mental health.
• Establish engineering best practices and technical foundations for future team growth.
• Shape our technical roadmap, make key architectural decisions, and influence the company's product strategy.

Required Qualifications

• 5+ years of experience building robust and well-architected software applications.
• Customer-obsessed and motivated to make an impact in the healthcare space.
• Expertise with data engineering and backend web development practices.
• A hands-on leader and collaborative team player with a keen attention to detail.

Preferred Qualifications

• Experience working with healthcare data and HIPAA best practices.
• Experience with machine learning and large language models for end-user applications.
• Experience building and managing teams of engineers on major software projects.

Benefits & Perks

• Flexible hybrid arrangement: 1-2 days/week at the San Francisco office (financial district) with a remote-first culture.
• Unlimited vacation policy and paid parental leave.
• Medical, dental, and vision insurance; pre-tax commuter benefits; and a 401(k).
• Significant equity as an early employee and a ground-floor opportunity to help build a team and culture.
• Regular team events and offsites, plus company-provided equipment and home office setup.
• Compensation Range: $200K - $250K

At Onos Health, we value diversity and are an equal opportunity employer. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.