Software Engineer II; Backend & Systems

Software Engineer II (Backend & Systems)

At Luna Health, we are driven by a singular mission: to bring the transformative power of insulin automation to the masses. We are a venture-backed medical device startup building innovative hardware and software to make life with insulin‑requiring diabetes simpler and safer.

Our product combines next‑generation hardware with intelligent software to automate insulin delivery and improve patient outcomes.

We are seeking a Software Engineer II to support development of backend services, system integrations, and data flows across our platform.

This role operates at the intersection of:

• cloud/backend services
• connected medical devices (Bluetooth)
• mobile applications (iOS)

You will contribute to integrations and system functionality that directly support core product experiences and real‑world device interactions.

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.

• Build and maintain backend services and APIs supporting product functionality
• Contribute to integrations across:
  • mobile applications
  • backend systems
  • Bluetooth‑connected devices
• Design and maintain data flows for real‑time and near real‑time system interactions
• Support reporting, export, and integration‑related workflows

• Debug issues spanning mobile, backend, and device layers
• Support improvements to backend reliability, scalability, and maintainability
• Investigate and resolve system integration issues
• Observe and investigate system behavior in real‑world scenarios

• Drive delivery of features across backend and system components in collaboration with cross‑functional teams
• Collaborate with senior engineers on system design and architecture
• Participate in code reviews and contribute to engineering best practices
• Support release stabilization and issue resolution activities

• 3–5 years of software engineering experience
• Experience building and shipping production software systems

• Strong proficiency in backend development (Node.js, Python, or similar)
• Experience designing and building APIs and backend services
• Familiarity with:
  • databases and data modeling
  • cloud infrastructure (AWS, GCP, or similar)
  • Git‑based development workflows
  • CI/CD practices
• Experience working with mobile applications or willingness to contribute to mobile codebases

• Experience working across multiple system components
• Ability to debug issues spanning:
  • backend services
  • mobile applications
  • device integrations
• Understanding of data flow and system reliability concepts

• Experience with:
  • Bluetooth / BLE or connected devices
  • healthcare or regulated environments
  • real‑time or data‑heavy systems
  • integrations with external services or APIs

• Strong ownership mindset and accountability
• Ability to work independently in a fast‑moving environment
• Comfortable working in ambiguous problem spaces
• Collaborative approach to working across engineering disciplines
• Pragmatic approach to balancing speed, quality, and reliability

This role is critical to:

• enabling reliable system integrations
• improving backend scalability and reliability
• supporting future product and platform growth

You will help build systems that directly impact patient experience and product safety.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.

The physical demands described here represent those that an employee must meet to perform the essential functions of this job successfully. Reasonable accommodations may be made to enable individuals with disabilities to perform essential functions.

• Sit for extended periods of time at a keyboard and mouse
• Lift and move up to 25lbs
• Hearing and speaking will be required regularly
• Specific vision abilities include close and distance vision, depth perception, peripheral vision, and the ability to adjust focus