Senior Software Engineer

Luna Health•San Diego, CA

2d•Hybrid

About The Position

Luna Health is a venture-backed medical device startup focused on making life with insulin-requiring diabetes simpler and safer through innovative hardware and software. Its product combines a small patch pump with an automated insulin-dosing algorithm to adjust insulin overnight. The product has reached clinical studies, and the company is building toward commercial launch. The Senior Software Engineer will serve as a hands-on technical leader, owning complex features end-to-end across the mobile application, cloud backend, and Bluetooth-connected medical devices. The role involves building a reliable, scalable, and safe software platform for real-world use. The engineer will work across system design, implementation, debugging, testing, documentation, release support, and cross-functional delivery, with decisions that directly affect patient outcomes. This is a hybrid, on-site role three days per week. Applicants must live within a reasonable commuting distance of Luna Health’s San Diego, California site.

Requirements

Bachelor’s degree in Computer Science, Software Engineering, or a related technical field, or equivalent experience.
5–8+ years of software engineering experience building and shipping production applications.
Track record of owning features or systems end-to-end.
Strong proficiency in backend development, such as Node.js, Python, or similar, including designing and building APIs and cloud services.
Experience with native iOS development, or strong willingness to contribute to mobile codebases.
Experience working across multiple system components and debugging issues spanning mobile, backend, and device interactions.
Strong understanding of data flow and system reliability.
Familiarity with modern development practices, including Git-based workflows, code reviews, and CI/CD.
Strong ownership mindset and accountability, with the ability to operate independently in a fast-moving, ambiguous environment.
Attention to detail, especially in user-facing and safety-critical workflows.
Pragmatic approach to balancing speed, quality, and reliability.
Clear communication across engineering, product, design, quality, and regulatory teams.
Ability to meet the physical demands described for the role, with reasonable accommodations where applicable.

Nice To Haves

Cloud infrastructure experience, such as AWS or GCP.
Experience with data pipelines or real-time data systems.
Experience with Bluetooth/BLE or connected devices.
Experience in healthcare or regulated environments.

Responsibilities

Own the design and implementation of complex product features from requirements through release.
Lead development of workflows for onboarding, therapy features, and data visualization.
Partner with product and design to deliver intuitive, high-quality user experiences.
Design, build, and own backend services, APIs, data models, and system interfaces.
Design and maintain real-time and near-real-time data flows between the mobile app, cloud, and Bluetooth-connected devices.
Debug and resolve issues across mobile, backend, and device layers.
Drive reliability and scalability improvements based on real-world usage.
Make architecture and implementation decisions for new features and identify and reduce technical risks early.
Set standards for code quality, testing, and maintainability.
Break down complex problems into deliverable milestones and drive delivery with cross-functional teams.
Support release cycles, including debugging and stabilization.
Mentor and support other engineers as the team grows.
Own testing and documentation for features developed.
Write and execute unit, integration, and system-level tests, and maintain automated test coverage in CI/CD.
Contribute to design control documentation, including software requirements specifications, software design specifications, and test plans; software risk analysis; and verification activities for a regulated medical device.
Implement safety-critical behavior, including error detection, alerts, and fail-safe handling across the app, cloud, and device.