I build systems that survive. Not just features that ship — the foundational layer underneath: the tokenization engine, the security infrastructure, the cloud architecture that keeps everything running when traffic spikes and edge cases become real incidents. At Alt DRX, I came in as an engineer and ended up owning the full technical picture — blockchain settlement on XRPL, cloud cost optimization on AWS (cut costs 50%), a Flutter + web platform serving real investors, and an engineering team I hired and built from zero to 30+ people. The company scaled to a ₹450CR+ valuation. I wrote a lot of the core code that made that possible. → SQFT Tokenization engine — ₹100CR+ in on-chain transactions across XRPL, Ethereum, IPFS, Polygon → In-house security layer — audit trails, cryptographic logging, HMAC signing, OWASP-hardened APIs → Custom Deep Link system — replaced AppsFlyer/Adjust to own attribution data → Browser fingerprinting + Play Integrity-style compliance for fintech regulatory requirements → Payment Infrastructure — Kafka + Redis + MySQL processing ₹50L+/week, zero downtime → Logging Engine — in-house observability handling 5L+ log events/day across all microservices → Core Microservice Platform — powering WhatsApp, Web & App for 1L+ daily users → Mobile Platform — Flutter + Native Android/iOS used by 2L+ users, owned architecture to delivery → Open Source — OWASP hardening, HMAC signing, blockchain primitives, novel encryption · Node.js & Flutter I've published 8 technical books on Flutter, TypeScript, Node.js, MongoDB and ReactJS — on Amazon and Google Books. Writing books forces a different kind of understanding. I interview for system thinkers, not framework users. I've personally interviewed 100+ candidates and hired 30+ engineers across three startups. The ones who last understand why, not just how. My core depth: Backend systems (Node.js, TypeScript, Go), Cloud infrastructure (AWS primarily), Security (HMAC, JWE, encryption, OWASP), Blockchain (XRPL, Ethereum, Polygon). I work across the stack when needed — Flutter, Next.js, Android — but backend architecture and security is where I think clearest.