Software Engineer II (Backend & Systems)

Luna Health•San Diego, CA

8d•Hybrid

About The Position

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. The Role 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.

Requirements

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
Familiarity with cloud infrastructure (AWS, GCP, or similar)
Familiarity with Git-based development workflows
Familiarity with 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
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

Nice To Haves

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

Responsibilities

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