Senior Software Engineer (Backend & Systems)

Luna Health•San Diego, CA

17h•Hybrid

About The Position

At Luna Health, our mission is to bring automated insulin delivery to the people who have been left out of it. Insulin pumps have offered automation for years, but fewer than 5% of insulin users have one. They're expensive, intrusive, and complicated. Over 90% of insulin users rely on pens instead: simple, discreet, and until now, entirely manual. Luna is changing that. Our device works overnight, automatically delivering micro-boluses of insulin while people sleep. Better Nights for Better Days. The Role We're looking for a Senior Software Engineer to own backend services, system integrations, and the data flows that enable the Luna system. This role sits at the intersection of cloud services, a Bluetooth-connected medical device, and an iOS app. You'll own the backend integrations and functionality that make the core product work in the real world. You will take ownership of complex features and be central to keeping our system reliable, scalable, and safe. Your work and engineering decisions directly impact patient outcomes. This is a hybrid role and you must live within a reasonable commuting distance of the Luna Health office in San Diego, CA. Applicants must be authorized to work for any employer in the U.S. We are unable to sponsor or take over sponsorship of an employment Visa at this time.

Requirements

5 to 8+ years of software engineering experience, with a real track record of independently owning production backend systems end-to-end
Experience building and shipping production software in a regulated or safety-critical environment
Experience owning features or systems end-to-end, from design through ongoing maintenance
Strong proficiency in backend development (using Node.js, Python, or similar)
Experience designing and building APIs and cloud services
Experience with containerization and orchestration tools (Docker, Kubernetes, or similar)
Experience with native iOS development or strong willingness to contribute to mobile codebases
Familiarity with modern development practices: Git-based workflows, code reviews, CI/CD
Comfortable with PHI/PII; familiar with HIPAA and basic security practices
Experience working across multiple system components
Ability to debug issues spanning mobile, backend, and device layers
Strong understanding of data flow and system reliability

Nice To Haves

BLE or connected device experience
Healthcare or regulated environments (FDA SaMD experience is a real plus)
Experience with data pipelines or real-time data systems
Strong ownership mindset and accountability
Ability to operate independently in a fast-moving environment
Comfortable working in ambiguous problem spaces
High attention to detail, especially in safety-critical and user-facing workflows
Pragmatic approach to balancing speed, quality, and reliability

Responsibilities

Own the design and implementation of complex product features end-to-end
Lead development of workflows across onboarding, therapy features, and data visualization
Partner with product and design to ship features that work well for patients
Design, build, and own backend services and APIs to support product features
Define and maintain data models and system interfaces
Design and maintain data flows for real-time and near real-time system interactions
Debug and resolve issues across mobile, backend, and device layers
Drive reliability and scalability improvements over time
Contribute to integration with Bluetooth-connected medical devices
Make architecture and implementation decisions for new features
Set standards for code quality, testing, and maintainability
Mentor and support other engineers on the team
Identify and reduce technical risks early
Break down complex problems into deliverable milestones
Drive delivery across mobile and backend components, working with product, design, and other teams
Support release cycles, including debugging and stabilization