Jurij Tokarski
I run Varstatt and create software. Usually, I'm deep in work shipping for clients or building for myself. Sometimes, I share bits I don't want to forget.
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What an AI & Automation Retainer Looks Like
AI automation services on a weekly retainer — personal AI assistant setup, workflow scripts, ongoing maintenance. Same retainer, same person, same cadence as building.
What a White Label Web Development Retainer Looks Like
White label web development on a weekly retainer — senior dev capacity behind an agency or design studio's brand, invisible to their clients.
Errors That Never Left The Device
Eleven silent failure paths in a clinical iOS app. None of them surfaced as a backend alert.
Works Locally, Fails After Deployment
File tracing misses runtime paths, Cloud Run changes the working directory, CloudFront eats routes, and OG images silently vanish — four failures that pass every local test.
When the LLM Remembers Too Much
A vendor rate becomes a budget constraint and reasoning leaks across step boundaries — two failures from implicit state crossing where it shouldn't, and the architecture that fixed both.
What a Firebase Audit Looks Like
Firebase consulting, structured as a one-week audit. Firestore queries, security rules, cost drivers — find what's exposing data and what's running up the bill.
What a Software Maintenance Retainer Looks Like
Software maintenance services on a weekly retainer: dependencies, security, performance, monitoring, bug fixes, and new features — same diligence as building.
Null Bytes, Dead Streams, Last Chunk
SSE adds overhead for mixed events, silent streams hang without error, and the last audio chunk vanishes on page close — three LLM streaming fixes.
200 OK, Data Wrong
Imagen rewrites your prompt, Lambda corrupts your binary buffer, GSC returns empty rows, and structured output truncates without error.
What a Code Audit Looks Like
Code audit, software audit, technical due diligence — same work, different buyers. One week, $997, prioritized by risk: security, architecture, tech debt.