hi, I’m Mihai!
I’ll keep it nice and quick. Currently I’m a founding engineer/partner at Polarity. I’m extremely obsessed with startups, and don’t see myself anywhere but there or in ventures.
I entered this world a year ago, and I’ve split the last year of my life into startup life and venture life.
- Production traces·Replay every agent decision with full tool calls, prompts, and tokens
- Eval runs·Score outputs across factuality, latency, cost, and custom rubrics
- Sandbox specs·Pin agent behavior with deterministic specs that fail loud on drift
- Regression alerts·Catch model drift and tool failures before they reach your users
- Experiments·A/B compare prompts, models, and policies on real production traffic
- Scorer library·Built-in scorers for factuality, exact-match, file presence, and more
- Slack alerts·Get pinged when an agent regresses or a critical scenario fails
- LLM judges·Auto-grade open-ended outputs with calibrated judge models
- Datasets·Curate golden datasets from production and replay them on every change
- SDKs·Python, TypeScript, and Go SDKs to instrument any agent in minutes
Scanned 14,213 production traces from the last 24 hours across 6 agents, 3 model versions, and 2 sandbox specs.
Regressions detected
- 1. refund-bot v3: Factuality dropped 12% after the GPT model bump — 41 affected traces.
- 2. triage-agent: Tool-call latency p95 spiked 2.4× on the new retriever.
- 3. summarizer-v2: Judge score fell below the 0.85 threshold on legal corpus.
- 4. paragon-hello-world: A new failure mode hit 8% of traces — escalating arguments mid-loop.
- 5. api-endpoint-eval: Exact-match dropped from 91% to 79% on the v3 prompt.
- 6. review-agent-eval: Cost per task up 38% from token bloat in the new system prompt.
What would you like to work on?
Polarity
Currently I'm a founding engineer/partner at Polarity. Best team I've worked with. I joined at the very start and got to build most of it alongside people I'll have for life, growing together. More information soon.
Northside Ventures
Currently I'm an AI Product Engineer at Northside. I joined because of the team, and because of the mix between venture and engineering.
Manulife
Business Intelligence Analyst for a winter term, working on data pipelines and reporting. My first real look at how a large organization moves.
Waterloo & Laurier
The double degree: a BMath from Waterloo and a BBA from Laurier, running in parallel.
Polarity
Currently I'm a founding engineer/partner at Polarity. Best team I've worked with. I joined at the very start and got to build most of it alongside people I'll have for life, growing together. More information soon.