About Andrei Cosmin
Full-Stack Developer specialized in blockchain, dApps, Web Applications, AI-powered applications, and workflow automation. I build complete products end-to-end, from smart contracts and Web3 backends to SaaS platforms, Web Applications, LLM integrations, and n8n automations.
With 4+ years of professional experience, I've shipped production systems for international clients including a multi-tenant AI SaaS platform, NFT game backends, real-time multiplayer apps, and fractional ownership dApps. I work async across time zones, communicate clearly, and deliver work that's built to last, not just to demo.
Italian
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- FreelanceFull-Stack EngineerJanuary 2022 - Today (4 years and 7 months)Remote• • Delivered 10+ end-to-end web products for international clients, handling everything from initial scoping and architecture to deployment and maintenance, consistently on time and with positive feedback.• • Shipped a production-grade multi-tenant SaaS platform (CosloAI) integrating AI support, booking, and commerce workflows across web, WhatsApp, and Shopify channels.• • Built real-time multiplayer systems handling concurrent sessions with Socket.IO, server-authoritative game validation, Redis-backed state, and room-based permissions, zero tolerance for client-side manipulation.• • Integrated payment flows including Stripe, cryptocurrency wallets, and MoonPay fiat on-ramp, enabling clients to capture revenue across multiple channels.• • Worked fully remote and async across time zones, translating product requirements into technical solutions and shipping with consistent quality.
- Retex S.p.A.,IT Technician — Retail SystemsJanuary 2018 - January 2022 (4 years)Turin, Metropolitan City of Turin, Italy• • Configured, commissioned, and maintained retail hardware and point-of-sale systems (POS, servers, payment terminals) for large retail clients.• • Provided on-site and remote troubleshooting during rollouts and urgent interventions, coordinating with internal teams and vendors to minimise downtime.
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Education
- High School DiplomaTechnical InstituteHigh School Diploma