Vasyl

AI Engineer building local-first LLM systems. Currently: textstack.app — open-source reader for technical books. Writing about RAG, agents, and shipping LLM features that actually run.

Waterloo Joined on Feb 10, 2020 https://vasyl.blog

AI outputs looking plausible even when wrong

Vasyl

Jun 23

An AI Feature Has No "Tests Pass" Moment. So I Write the Eval First.

#ai #dotnet #csharp #machinelearning

4 min read

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Vasyl

Jun 17

AI Evals, Part 5: From a Number to a Gate Evals in CI and Production

#ai #evals #llm #dotnet

4 min read

Vasyl

Jun 17

AI Evals, Part 4: LLM-as-Judge, Done Right

#ai #evals #llm #dotnet

5 min read

Vasyl

Jun 16

AI Evals, Part 3: Golden Datasets That Dont Lie

#ai #evals #llm #dotnet

5 min read

Vasyl

Jun 12

AI Evals, Part 2: Error Analysis The Unglamorous Superpower Behind Good Evals

#ai #evals #llm #dotnet

5 min read

Vasyl

Jun 10

AI Evals, Explained: How We Actually Know Our AI Is Any Good

#ai #evals #llm #dotnet

6 min read

Gemma 4 Challenge: Build With Gemma 4 Submission

Vasyl

May 13

I put Ollama on a 4 GB mobile GPU and got 2.5 — here's the VRAM math

#devchallenge #gemmachallenge #gemma #ollama

6 min read

Gemma 4 Challenge: Build With Gemma 4 Submission

Vasyl

May 12

I shipped local LLM features two months ago. Production never ran them once.

#devchallenge #gemmachallenge #gemma #ollama

13 min read

Vasyl

May 7

Open-source licenses 101: which one to actually pick

#opensource #beginners #programming #tutorial

5 min read

Vasyl

Apr 22

I Quit Designing Data-Intensive Applications (DDIA) Three Times. Here's What I Build on the Fourth Try.

#showdev #ai #machinelearning #beginners

6 min read

Vasyl

Jan 17

How We Made Our React SPA Visible to Google Without Rewriting Everything

#javascript #react #tutorial #webdev

4 min read

Vasyl

Jan 2

How to Expose Your Local Server to the Internet (Without Port Forwarding)

#devops #networking #tutorial

4 min read

Vasyl

Jul 24 '25

Build and Push .NET 8 Apps as Docker Images (No Dockerfile)

2 min read

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Vasyl

Gemma 4 Challenge Completion

1 Week Community Wellness Streak

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An AI Feature Has No "Tests Pass" Moment. So I Write the Eval First.

Want to connect with Vasyl?

AI Evals, Part 5: From a Number to a Gate Evals in CI and Production

AI Evals, Part 4: LLM-as-Judge, Done Right

AI Evals, Part 3: Golden Datasets That Dont Lie

AI Evals, Part 2: Error Analysis The Unglamorous Superpower Behind Good Evals

AI Evals, Explained: How We Actually Know Our AI Is Any Good

I put Ollama on a 4 GB mobile GPU and got 2.5 — here's the VRAM math

I shipped local LLM features two months ago. Production never ran them once.

Open-source licenses 101: which one to actually pick

I Quit Designing Data-Intensive Applications (DDIA) Three Times. Here's What I Build on the Fourth Try.

How We Made Our React SPA Visible to Google Without Rewriting Everything

How to Expose Your Local Server to the Internet (Without Port Forwarding)

Build and Push .NET 8 Apps as Docker Images (No Dockerfile)