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Principal Software Engineer - Frontend Mobile

Hinge Health

Hinge Health

Software Engineering
San Francisco, CA, USA
Posted on Friday, March 10, 2023
One in two people experience debilitating back, neck, shoulder, or joint pain — but traditional treatments have failed to meet their needs. Physical therapy can be expensive and hard to access; appointments often involve long commutes and missed work. Making matters worse, unresolved pain can trigger the overuse of opioids and surgeries.
Join us in reimagining healthcare from the ground up. We’re making high-quality care accessible by pairing wearable sensors and computer vision with a world-class clinical team. Hinge Health puts a digital clinic in every member's pocket. Now millions of people can access personalized digital care from a physical therapist, guidance on behavior change from a health coach, and expert consultations with an orthopedic surgeon. With a single app and wearable technology like our Enso device, we’re helping to reduce pain, surgeries, and opioid use.
Here at Hinge Health, we welcome all applicants and know a diverse team makes us better and stronger. We look for individuals who embody our leadership principles and we value varied experiences and skill sets. Beyond specific work experience, we also look for unique capabilities and skill sets that are key indicators an applicant will thrive in our fast-paced, frequently evolving environment. If this sounds like the kind of place you’d like to be part of, please apply - we would love to hear from you!
What does Hybrid mean at Hinge Health?
We believe that remote work and in-person work have their own advantages and disadvantages, and want to be able to leverage the best of both worlds. Some roles which require a greater degree of day-to-day collaboration will benefit from more in-person opportunities. That’s why we are encouraging employees near hubs to have in-person engagement and why we plan to localize our hiring strategy for certain teams to grow within designated hubs.
About the Role
Application Principal Engineers guide and accelerate the evolution of Hinge Health’s mobile app. To improve member experience and outcomes, the mobile app must evolve toward a deeply personalized, “magical” experience that takes full advantage of device capabilities–including BLE input and ML edge computing. To increase the pace of innovation, the architecture of the mobile app must evolve to support dozens of independently contributing teams running hundreds of concurrent A/B tests with minimal coordination.
Principal engineers will glide between levels of abstraction to foster strong technical alignment, facilitate great technical decision making, and implement elegant solutions to the most complex and high-leverage technical problems. Their pragmatism, collaboration, thoughtfulness, and creative joy will shine through in every gesture, and disproportionately influence the technical culture of an engineering team that’s still doubling in size every year.
We enjoy a continuous deployment DevOps culture, and take owner-operator pride in supporting our code in production with an on-call rotation. Rotations vary by team.


  • Continuous evolution of Hinge Health’s client mobile app to scale up to dozens of teams running hundreds of concurrent experiments.
  • Design and architecture of high-impact new customer experiences.
  • Scope and schedule of large projects are consistently accurate, due to rigorous de-risking and thoughtful planning.
  • Attentive mentorship and active skills training accelerates the professional development of technical leaders.
  • Strong alignment around well-defined principles and vision for change aligns several independent teams to make progress with little active coordination.
  • Increase Hinge Health’s voice in industry with technical articles and speaking engagements.
  • Increase the pace of high-quality innovation in one of the fastest growing startups shaping a new industry.
  • Be frequently moved to tears by your work, as you improve access to healthcare and transform real individual’s lives by offering relief from debilitating pain.


  • Front end mobile application development on a large, complex, top-quality consumer application using React Native.
  • Expertise in high performance computation, with an emphasis on profiling and bottleneck discovery, O(n)-driven intuitions, benchmarking, concurrency
  • Expertise in low-latency, highly resilient client-server architecture, including graceful degradation of features in low- or no-bandwidth modes.
  • Deep familiarity with the mobile app ecosystem, including testing, observing, deploying, and managing several concurrent versions in the field across a wide rage of consumer devices
  • Team-first, growth mindset, and ability to add leverage to every level of the org, from shipping code to shaping strategy with senior leadership.
  • Track record of effective project management, primarily devoted to early derisking, problem decomposition, and a strong vision that pulls the team toward the destination together
  • Experience with Agile techniques and tooling for rapid prototyping and experimentation
  • Education: Bachelor's in computer science, software engineering or related technical field


  • Experience with ML at the edge, inc computer vision, NLP, and diagnostic AI.
  • Expertise in Node.js, Android or iOS SDKs and native capabilities
  • Experience in IoT, smart home, AR/VR, or wearables (esp ones using BLE)


  • Inclusive healthcare and benefits: On top of comprehensive medical, dental, and vision coverage, we offer employees and their family members help with gender-affirming care, tools for family and fertility planning, and travel reimbursements if healthcare isn’t available where you live.
  • Planning for the future: Start saving for the future with our traditional or roth 401k retirement plan options which include a 2% company match.
  • Modern life stipends: Manage your own learning and development budget, use the mental health to support therapy costs, and lifestyle stipends to cover your favorite wellness services, and work-from-home equipment.
  • Flexible vacation and paid time off: Employees have flexibility to choose when, how, and why they take time off to rest and recharge. Exempt employees can take advantage of our flexible pto program. Nonexempt employees can utilize up to two weeks of sick time and up to 17 days of vacation per year, including mental health days.
  • Other compensation: At Hinge Health, we want every employee to be invested and rewarded in the future success of the company. All full-time positions are eligible for equity.
About Hinge Health:
LinkedIn recently named Hinge Health one of the Top 50 Startups. Forbes, Fast Company, and Inc. have also recognized our technology, innovation, and culture.
Since our founding in 2014, we've raised more than $800 million from leading investors, including Coatue and Tiger Global. We work with 1000 customers across every industry and the public sector — including Salesforce, Verizon, and the State of New Jersey — to give more than 23 million people access to the care they need. We’re positioned to continue leading the market with unmatched investments in clinical research, care innovation, machine learning, AI, and computer vision.
Diversity and inclusion:
We’re committed to building diverse teams that reflect the communities we serve. Visit to learn more about what moves us.
Hinge Health is an equal opportunity employer and prohibits discrimination and harassment of any kind. We make employment decisions without regards to race, color, religion, sex, sexual orientation, gender identity, national origin, age, veteran status, disability status, pregnancy, or any other basis protected by federal, state or local law. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements.
We provide reasonable accommodations for candidates with disabilities. If you feel you need assistance or an accommodation due to a disability, let us know by reaching out to your recruiter.
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If you're interested - we'd love to hear from you.