What I paste into a fresh Claude or Codex session
Behavior rules, a Claude-plus-Codex review loop, a generate-and-cut method, and a rubric for good UI: four short files with one-click copy, so you can skip the token tax of gstack.
Engineer, startup founder, sometimes runner.
👋 I'm Rareș, a software engineer and entrepreneur based in New York. Most recently, I co-founded Contour Care and led engineering through its acquisition by Commure. These days, I'm building developer productivity tools and software for real estate agents and the New York City rental market. When I'm not building products, you'll find me tinkering with robotics, embedded systems, or planning my next summit.
A better way to move files over MCP
MCP calls make the model recite the whole payload token by token. A small CLI lets code move it, so it never enters context in the first place. Fewer tokens, less time.
Reliable JSON from Cheaper LLMs
How plain JSON, Zod validation, and a repair loop let Gemini 3.1 Flash-Lite run 80% cheaper and 2× faster than our Claude Haiku baseline.
Build the Feedback Loop First
Retrofitting CI, linting, Prettier, and regression tests into a mature codebase makes AI coding useful by catching broken changes before reviewers do.
Work
- Company
- Contour Health
- Role
- Co-Founder & CTO
- Date
- Description
- Co-founded Contour Health, later evolved into Contour Care, and led engineering through the company’s acquisition by Commure.
- Company
- Assort Health
- Role
- Founding Engineer
- Date
- Description
- Built backend core and Epic EHR integrations for AI healthcare platform (later raised $76M Series B).
- Company
- Athelas
- Role
- Sr. Software Engineer
- Date
- Description
- Led development of the first FDA-cleared at-home CBC, plus RPM tools and billing / reconciliation.
- Company
- Uber
- Role
- Software Engineer II
- Date
- Description
- Built real-time fraud detection and payment systems processing millions of transactions daily.
- Company
- Level Home
- Role
- Firmware Engineer
- Date
- Description
- Achieved 1+ year battery life for smart deadbolt through ultra-low power optimization.
- Company
- Tesla
- Role
- Systems Integration
- Date
- Description
- Developed firmware for Model 3 security systems. Built testing infrastructure for production ramp.
- Company
- FleetCarma (Geotab)
- Role
- Embedded Developer
- Date
- Description
- Reduced GPS fix time from 27s to <4s for EV fleet telemetry devices.