Cerebral: a HIPAA EMR at millions of patient records
Cerebral is a mental healthcare service with its own electronic medical records system, prescriptions and insurance handling. I was a staff backend engineer there from June 2020 to February 2023.

The problem
A healthcare startup that grew to a unicorn in under a year, on a Rails codebase whose EMR, prescription flows and third-party integrations had to scale with it under HIPAA.
What I did
- Built and upgraded integrations with Gentem, DoseSpot and Truepill.
- Built and maintained the prescription processing workflows.
- Upgraded the EMR to handle millions of patient records.
- Integrated prescription and insurance providers.
- Upgraded the admin dashboard and improved the doctor-facing screens.
Result
Millions of patient records; the company went from small startup to unicorn in under a year.
Hackathon winner (first place, May 2021) and top performer of the month (August 2021).
Stack
Konstantin worked for us for over 2 years and did an exceptional job in contributing to our Ruby on Rails codebase. He was always willing to dive in deep and was very committed to making our code base better. He has great expertise and would be more than happy to rehire him in the future!
Related: Architecture and performance audit
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43 clients, 21,500+ hours, 100% Job Success — the reviews are on Upwork.