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👋 What I do

I'm an end-to-end AI Product Engineer. I take an idea from "we need this" to a live product without handoffs — design → frontend → Python/Node backend → AI logic → marketing automation → SEO → deploy.

Over the past year I've shipped 10+ production products across PropTech, AI-content, paid Telegram bots, growth automation. My edge is the combination — not "another React dev," not "another ML researcher."

📍  Nha Trang, Vietnam · UTC+7 · open to relocation (Serbia, Armenia, UAE, EU)
🎯  Looking for:  AI Product Engineer · Senior Full-stack (React + Python + LLM) · Growth Engineer with AI focus
🛠   Stack edge:  Claude Code + MCP servers + Firebase + Python pipelines + LLM orchestration
🗣   Languages:   Russian native · English B1–B2 (improving daily)

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🚀 Featured projects

🛡 verify-by-failure An eight-step working loop for coding agents on production systems. A green test proves almost nothing — verify by breaking the thing. Every rule paid for by a real outage, including a watchdog that restarted a live service blindly for weeks while returning exit code 0. Claude Code · Skills · Reliability · Methodology	🧠 agnis-workflow Production-grade Claude Code setup for solo product engineers. Persistent memory + typed knowledge + CTO mode + iteration loops. Used on 5+ shipped products. Claude Code · MCP · Methodology · Templates
🎬 broker-reels AI text-to-video pipeline for real estate. Python + ffmpeg + LLM. Broker picks a unit → 30–60 sec → finished MP4 ready to publish. Replaces an SMM specialist. Python · ffmpeg · NVIDIA Llama · Flask · Firebase	🔌 mcp-servers 7 custom MCP servers wiring Yandex.Direct, Yandex.Webmaster, GSC, YouTube, VK, Telegram, Click.ru into the Claude tool loop. The only unified RU-market MCP toolkit. MCP · Python · Yandex APIs · Google APIs · VK · Telegram
🪞 portfolio This personal site. Single-page, dark + warm amber, no build step. Tailwind via CDN, 33 KB. Live: putksebe.su/cv. HTML · Tailwind · Vanilla · Static	⚡ nvidia-nim-cascade 9-model NVIDIA NIM fallback chain. Same OpenAI-compatible API, ~360 RPM at $0/month. Drop-in replacement for OpenAI fallback. Production-tested over 6 months. Python · NVIDIA NIM · LLM · Cost Optimization
📚 awesome-claude-code-workflows Curated list of methodologies, MCP servers, skills, templates, and tools for shipping production software with Claude Code. CC0. Awesome List · Claude Code · MCP · Methodology

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🛠 Stack

AI / LLM

Frontend & Backend

Marketing engineering (where most engineers don't go)

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📊 GitHub stats

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🧭 Currently exploring

• Agentic patterns: parallel research agents, two-boots (inside view + outside view) decision-making
• MCP server ecosystem: pushing for Russian-market platforms (the only unified toolkit)
• Cost-optimized LLM cascades — when the cheap model is enough, fall through to expensive only when needed
• AI as production runtime infrastructure, not just for coding (RAG, lead scoring, content enrichment)

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💬 Get in touch

Email: sergeykrin98@gmail.com  ·  LinkedIn: /in/sergeykrin  ·  Portfolio: putksebe.su/cv

If you're hiring for AI Product Engineer / Senior Full-stack / Growth Engineer roles — let's talk. I reply within 24 hours, even from Vietnam.

_{Profile built using the agnis-workflow methodology — typed memory, CTO mode, iteration loops.}