Product engineering
Typed interfaces, sensible state, and features taken from idea to production without losing the thread.
7 products shipped end-to-end
@princesingh · full-stack developer
React, Node.js, PostgreSQL, TypeScript.
I build web products end to end — schemas and APIs on one side, interfaces people actually enjoy using on the other. Lately that's meant SaaS analytics, headless commerce, and realtime tools. I care about performance, accessibility, and software that stays correct under load.
Open to freelance projects and full-time roles · Remote — working worldwide
I'm a full-stack developer for products where the details matter: the query plan behind the dashboard, the loading state nobody notices, the animation that makes an interface feel alive instead of busy.
Typed interfaces, sensible state, and features taken from idea to production without losing the thread.
7 products shipped end-to-end
APIs, workers, queues, and data pipelines that stay fast and correct at scale — with caching, Postgres tuning, and monitoring built in.
2M+ events/day, sub-second queries
Headless storefronts, subscriptions, checkout flows, and admin tooling that make the business side of a product feel effortless.
40+ merchants served on Cartly
Core Web Vitals, accessible components, and motion with restraint — the difference between a working product and one that feels expensive.
98+ Lighthouse across recent builds
Four years of shipping product — first at studios, then in-house, now independently.
Independent · Remote
End-to-end product delivery for startups — architecture, APIs, interfaces, and deployment. I work directly with founders and own the stack from schema to shipped feature.
Rebuilt a SaaS analytics platform now ingesting 2M+ events a day.
Northwind Labs
Built a headless commerce platform used by 40+ merchants and cut checkout latency by 38%. Introduced the design system, CI pipelines, and mentored two junior developers.
Checkout latency down 38% across 40+ merchant stores.
Pixel & Co.
Delivered marketing sites and internal dashboards for fintech clients. Rebuilt the front-end stack with TypeScript and React, and raised Lighthouse performance across the board.
98+ Lighthouse scores across every client build.
Crafted Web Studio
Shipped responsive websites for 15+ clients, maintained custom PHP and WordPress builds, and learned to own projects from first call to launch.
15+ client sites shipped in the first year.
Commits, reviews, and small improvements — the quiet part of building software.
Things I built outside client work — most of them start with a question and end with a shipped product.
Real-time product analytics with funnels, retention cohorts, and a custom dashboard builder — ingesting 2M+ events a day.
Headless commerce platform with a storefront builder, Stripe checkout, and an admin dashboard serving 40+ merchants.
Realtime team messaging with presence, typing indicators, threads, and end-to-end encrypted direct messages.
AI video repurposing tool that turns long-form content into short clips with auto captions and smart cropping.
Notes from things I built, broke, and fixed.
How a dot grid, IntersectionObserver, and a little restraint keep this page smooth on a five-year-old laptop.
Idempotency keys, unique constraints, and the bug that taught me to design retries before writing the happy path.
Reduced motion is not a kill switch. It's a second design that deserves the same attention as the first.
Certifications and programs that shaped how I build.
Amazon Web Services · cloud architecture, deployment, and operations.
Meta · React, interface engineering, and responsive design.
MongoDB · document modelling, aggregation, and application design.
freeCodeCamp · 300 hours of responsive web, APIs, and databases.
The tools I reach for when there's a product to build.
University of Delhi · First Class with Distinction
freeCodeCamp · 300-hour curriculum
I'm taking on freelance projects and open to full-time roles. Tell me what you're working on — I usually reply within a day.
or write directly — hello@princesingh.dev