Senior Full Stack Engineer · Founder & CTO of Cachin · 📍 Buenos Aires, Argentina
I build products end to end: web and mobile apps, the backend and database behind them, and the infrastructure that keeps them running. I work AI-native with Cursor, Claude Code and Codex.
🏆 3× hackathon winner · 🇦🇷 Member of Superteam Argentina · ◎ Solana first
Languages & Frontend
Mobile & Backend
Cloud & DevOps
Testing
Web3
AI-native
| Project | What it is | Built with |
|---|---|---|
| 💸 Cachin 🔒 | LATAM QR payments on Solana, where I'm Founder & CTO. Payments app (iOS & Android), CachinPOS for merchants and a tap-to-pay cold-wallet card. Next up: Visa card via a sponsored BIN. | Expo · Privy passkeys · USDC · Solana Pay |
| 🤖 Walter-OS | Open-source, self-hostable AI agent harness that runs Claude Code, Codex and Cursor under one contract, with approval gates. Co-built with Nico Fernandez. | Skills · MCP · default-deny egress |
| ⏱️ Horas | Chat-first time tracking (iOS & Android). Gemini drafts the entries, people confirm them. | Expo · Supabase · Gemini · pgTAP |
| 🥩 STEAK.NET · live | Liquid staking on Solana: swap SOL or any LST into STEAKSOL with best-route quotes. | Next.js · Sanctum · Jupiter |
| 🛡️ Guards · live | Treasury risk dashboard on Pyth price, EMA and confidence data, built with Nico Fernandez at Pythathon. | Next.js · Pyth |
| 🌐 kevan.ar · live | My portfolio, with a RAG chatbot over the site content. | Next.js · MDX · LangChain · OpenAI |
| 🕵️ Midnight ZK-KYC | Privacy-preserving KYC: prove age, country and liveness with zero-knowledge proofs. | Next.js · Midnight SDK |
| 🧰 dotfiles · mac playbook | My workstation as code. | zsh · Ansible |
| Project | What it is | Built with |
|---|---|---|
| 🏭 SectorTwin | Role-based 2D digital shadow of an industrial process line, with default-deny RLS tested per role. | Next.js · Supabase · pgTAP · Playwright |
| 📡 OTRORA | OT asset inventory & vulnerability management: 670 OT devices scanned, 860+ NVD vulnerabilities tracked with mitigation plans. | Next.js · Supabase · NVD/CPE |
| 💬 Yara ai | CTO (Contract), Feb–Apr 2026. WhatsApp AI agent recommending Buenos Aires events to ~2,000 users. | Express · Gemini · Postgres · GCP |
| Event | Project | |
|---|---|---|
| 🥇 | SOLxAR <> Shipyard, 1st place · Oct 2025 · results | Early version of Cachin |
| 🥇 | Midnight Hackathon Buenos Aires, 1st place · Aug 2025 | ZK-KYC · my fork |
| 🏆 | NMKR Berlin, Transparency category winner · Jul 2024 | MaskBid |
| 🎖️ | Buena Hackday, honorable mention · 2024 | — |
Other hackathon builds: Guards (Pythathon Buenos Aires 2026) · Samurai de Cardano (Cardano Summit 2025) · Necrypto (Aleph 2025) · Mimic Protocol (2025) · Cachin at Colosseum Frontier (2026).
Built in Buenos Aires, Solana first. More at kevan.ar · git@kevan.ar