About Me
"Day sales, night tools (not objects) builder. Ex-Dota enjoyer."
The Story
I'm Daniel Petrushevsky (also Petrushevskyi), known online as SeMmy. I live in Oleksandriya, Ukraine 🇺🇦, where I split my time between a day job in sales and night-time passion for building tools.
My journey started with gaming — specifically Dota 2, where I played competitively as "Worst Timber EU" (my main hero was Timbersaw). Gaming taught me strategic thinking, rapid decision-making under pressure, and the value of community. Those skills translate directly to software development and product building.
Career Arc
Sales by day: I work as a Sales Manager at SignalHire, focusing on competitive intelligence and API integration. This gives me insights into B2B SaaS, customer needs, and what actually makes products successful.
Builder by night: After hours, I build tools. Not objects — tools. Things that solve real problems:
- Govantazh — Multi-tenant cargo management SaaS (in production)
- Memory Chain — Cryptographic proof system for AI agent memories
- zohcli — Go CLI for Zoho Mail & Admin APIs
- Claude Code Skills — AI agent workflow tools
Current Focus: AI Agents
I'm deep into AI agent development through the OpenClaw ecosystem. My current projects explore:
- Cryptographic memory: How agents can prove what they remember
- Autonomous workflows: Agents that work independently and report back
- Agent economics: WITNESS token for memory anchoring
The goal isn't to replace human work — it's to build tools that amplify what humans can do. Sales taught me to understand customer problems. Development taught me to solve them. Gaming taught me to iterate fast and adapt.
Tech Stack
Languages
TypeScript, Go, Python, JavaScript, Solidity
Frameworks
React 19, Astro, Hono, Next.js
Infrastructure
Docker, SQLite, PostgreSQL, Base blockchain
AI Tools
Claude Code, OpenClaw, AI agent workflows
Ukraine Context
Building from Ukraine during wartime adds unique constraints and perspectives. Power outages mean architecting for intermittent connectivity. Security concerns drive encryption-first design. The experience shapes how I think about resilience, decentralization, and what truly matters in software.
Get in Touch
I'm always open to interesting conversations about AI agents, SaaS architecture, or the intersection of gaming and software development.