Research & discovery
Customer interviews, competitive teardowns, technical spikes. I validate before I build, then keep validating after.
I'm Siarhei Sheleh — also known as Sergey Sheleg. I build, market, and operate AI products end-to-end from Warsaw, Poland. Twelve years of shipping behind me, three live products in front of me, and one inbox in the middle: [email protected].
I started shipping internet products in 2013, working as a product developer for clients in tech, agro, AI, and hardware. From 2015 to 2020 I led product and growth at Ultimate Guitar, helping musicians worldwide find chords, tabs, and lessons. From there I started co-founding and founding my own products: ESIMPlus, Nicegram, WhatPlantIsThis, Genie AI, HyperLancer, and Degenphone.
In 2024 I formalized everything under SV Lab — a solo AI product lab. Today it runs three live products: Prowl (an AI marketing-intelligence agent), CheckMyData (an open-source NL-to-SQL agent), and PrivateClawd (a managed cloud for AI agents).
My edge is owning the full stack a product needs to exist: research, engineering, go-to-market, marketing, and operations. Most teams treat these as separate roles. As a solo operator, I treat them as one loop — and ship faster because of it. That same loop is what I bring to consulting and AI transformation engagements.
Customer interviews, competitive teardowns, technical spikes. I validate before I build, then keep validating after.
TypeScript end-to-end: agents, data pipelines, payments, infra. I write the code that ships, not just the spec.
Positioning, pricing, launch, distribution, first 1,000 users. GTM runs as the same loop as the build.
Stripe billing, support, legal, vendor stack, analytics — the boring infrastructure that keeps a one-person company compounding.
A trimmed slice of the track record. Want the full list? See all 8 →
NFT-backed eSIM phone numbers for Web3 users.
Founder · build · GTMFreelance marketplace for Human + AI agent collaboration.
Founder · product · GTMAI assistant for everyday challenges with smart, intuitive solutions.
Founder · product · opsPrivacy-first Telegram client with superior UX.
Co-creator · growthBotany meets ML — visual plant identification for enthusiasts.
Founder · productGlobal mobile connectivity for travelers.
Co-founder · productWhether it's a tightly-scoped advisory sprint or a full AI transformation across your processes and org — I read every email and reply within one business day.