All work

Connected wellness

Hyperice

Backend for HyperSmart, the connected recovery platform behind Hyperice's smart devices.

Role
Lead Backend Developer
Years
2019–2023
Domain
Connected wellness
Athlete training in a gym
  • 280ms

    Database response time

    75% faster, down from 1.2s

  • 25,000+

    Concurrent users

  • 99.8%

    Uptime

  • 5

    Health platform integrations

Led backend architecture for HyperSmart, the platform powering Hyperice's expansion into digital wellness products. When I joined, the API was slow and couldn't handle the growing user base. I redesigned the database layer and rewrote critical API paths in NestJS + PostgreSQL, which cut database response times from 1.2s to 280ms and API latency by 60%.

Built integrations with Apple Health, Strava, Garmin, and Whoop, each with its own auth flow and data format. All health data encrypted at rest and in transit.

Scaled the system to handle 25,000+ concurrent users at 99.8% uptime. Over 4 years this was one of those projects where I touched every part of the backend, from database migrations to CI/CD to incident response.

What’s next

Got something that can’t break?

Fractional CTO work, a backend that needs rescuing, an AI feature that has to survive a compliance review — or just a second opinion on an architecture. Tell me what you’re building and I’ll tell you straight whether I’m the right person for it.

or write to purg.jaka@gmail.com