Sergii Kirianov

I built an open-source tool that cuts LLM token usage by 97% for AI browser agents. Here's the backstory: I noticed every AI agent hitting the same wall — a single webpage burns 100k-180k tokens when you send the raw DOM to an LLM. That's ~$0.02 per step on Claude. Over...

I’ve recently wrapped up my role as a Senior Full-Stack / Tech Lead after delivering a full production platform (web, mobile, backend, infra, AI features) from the ground up.

Alongside hands-on development, I led and mentored a small team of developers, owning technical...

I finally got tired of maintaining product tours, onboarding flows, and endless “How do I…?” documentation. So I built something better. Introducing AI-powered product tours for Next.js — zero config. You just drop in a component, ask: “How do I update my password?” …and the...

❌ Uploading images to AI chat apps sucks. Especially when the image is on your phone… but the chat is on your laptop. Most apps force you into this clunky flow: email image to yourself → download → upload → pray it works. So we thought: Why not remove the friction and make...