Kirit G.

Senior full stack developer for SaaS products, MVPs and social media apps, working in Node.js, NestJS, Next.js, React and Golang. My last long-term client project: 395 hours rebuilding a white-label social commerce platform, closed with a 5-star review. I've been building web applications since 2013 and co-founded Flexgrew Technologies, so I can work on my own or bring in frontend, DevOps and QA people from my team when your project needs them. What I build • SaaS platforms: multi-tenant architecture, user roles and permissions, Stripe subscriptions and billing, admin dashboards • MVPs for startups: from idea to a launch-ready product that can keep growing after launch • Social media apps and community platforms: news feeds, profiles, groups, pages, real-time chat, notifications, creator and influencer dashboards • Marketplaces: multi-vendor stores, product catalogs with variants, order splitting, commissions and vendor payouts • Backend development and REST APIs in Node.js, NestJS or Golang (Go Fiber), with PostgreSQL, MongoDB and Redis • Real-time features: WebSockets, live chat, typing indicators, online presence, Kafka and Redis pub/sub • App rescue: taking over unfinished or messy codebases, including apps started with Lovable, Bolt or Cursor, and making them stable, tested and ready for real users Recent results • Social commerce platform (395 hours, 5.0 rating): rebuilt real-time messaging, the activity feed, marketplace listings, groups and an influencer dashboard, moved chat and notifications onto WebSockets with Redis pub/sub, and cleaned up the GCP deployment. The client wrote: "Kirit and Flexgrew are the real deal. I'd hire them again without thinking twice." • Cut a client's load times by about 60% by reworking their database queries • Rewrote an old checkout everyone was afraid to touch. It ended up with three new payment methods and ran twice as fast • Fixed the data handling that kept crashing a client's mobile app How I work • I learn your product and your users before I write code, and I'll tell you when a feature costs more than it's worth • You get a short written update every working day • I use Claude Code, Cursor and Codex for boilerplate and tests so I can move faster. Architecture, code review and testing stay with me, and nothing is merged untested • I overlap with US and EU working hours and usually reply within a few hours Tech stack: Node.js, NestJS, TypeScript, JavaScript, Next.js, React, Golang (Fiber), PostgreSQL, MongoDB, Redis, Kafka, WebSockets, Stripe, Docker, AWS, Google Cloud (GCP) Tell me what you're building or where it's stuck, and I'll reply with how I'd approach it.