Simranjeet S.
Full-Stack SaaS Engineer | React | Node.js | AWS | AI | MVP to Scale
Full-stack SaaS engineer who turns ideas and stalled projects into production platforms that actually ship. React and Node.js front to back, on AWS infrastructure I set up and own. 7+ years, 26 jobs, 100% Job Success. I'm the engineer founders bring in when they need one person to own the whole build. Not a front-end dev who hands off the backend, and not a DevOps contractor who can't touch the app. I architect the system, write the code, deploy it, and keep it running. What that means for you: no coordinating a design shop, a dev team, and a DevOps contractor, and no gaps where things break between them. One person accountable for the whole thing working, so you move faster, spend less stitching pieces together, and get a product your users can rely on. Most recent flagship: I took a founder's compliance-SaaS concept and delivered it as a live, multi-tenant product their customers pay for. It runs on an AI pipeline that auto-extracts data from safety documents, with role-based access, Stripe and in-app billing, and a mobile PWA with offline QR access. Chemical safety and EHS compliance, built end to end, from idea to revenue-generating platform. WHAT I BUILD - AI-powered SaaS platforms: multi-tenant apps with auth, billing, role-based access, and admin dashboards - AI features built into real products: LLM extraction, RAG, chatbots, and workflow automation - Full-stack web & mobile: React, Next.js, Node.js, Python/FastAPI, PostgreSQL - Cloud infrastructure: AWS setup, S3, Redis/Celery jobs, CI/CD, monitoring - REST APIs and real-time systems for production-grade applications CORE STACK: React · Next.js · Node.js · Python/FastAPI · PostgreSQL · AWS · Docker · OpenAI · LangChain · RAG HOW I WORK I take ownership from architecture to deployment. I don't disappear after delivery, I don't overcomplicate simple problems, and I write clean, scalable code that holds up in production. Repeat clients keep coming back, several for three or more projects, because the systems I build keep working. WHERE AI FITS I build AI into products two ways: as native features in platforms I build from the ground up, and as new intelligence added to systems clients already run, like the automated document-extraction pipeline in my compliance platform. If AI needs to work reliably inside a real product, that's exactly what I do. INDUSTRIES SaaS & Startups | Compliance & EHS | FinTech | LegalTech | Healthcare | HR Tech | Marketplaces Whatever you're building, I know handing it to someone new is a leap of faith. So here's my offer: tell me what you have in mind, even if it's still rough, and I'll reply with honest thoughts on how I'd approach it and what it would really take. No pressure, no hard sell, just a straight answer from someone who's shipped this kind of work before. I read every message myself, and I'll get back to you personally.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $4.8k
Billed in all: $35,543$36k
$1.2k in the last 6 months
Across 33 contracts
Earnings, last 30 days
Skill rankings: Top 11% in ExpressJS
Ranked by MRR among everyone on Upwork with the skill.
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