Available for new opportunities

Nishanth SebastinFull Stack Developer

Building scalable, high-performance web applications with modern technologies.

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now-building.ts
const currently = {
focus: "scalable systems",
stack: ["Next.js", "NestJS", "Postgres"],
shipping: true 
};
Years of experience
0+
Projects shipped
0+
Technologies
0+
Active merchants
0+
About

A developer who cares about the craft

I am a passionate Full Stack Developer specializing in building modern, scalable, and high-performance web applications. I enjoy creating polished user experiences, robust backend systems, and developer-focused tools.

Clean Architecture

Type-safe, modular code that ages well — designed for the team that comes after.

Performance First

Sub-second loads, fluid interactions, and Lighthouse scores that hold up under scrutiny.

End-to-End

Comfortable from pixel-perfect UI down to database query plans and infra.

Ship Fast

Bias toward shipping. Tight feedback loops, pragmatic decisions, working software.

Skills

The toolbox

A pragmatic stack chosen for speed, scale, and developer experience.

Frontend

8 tools
React.jsNext.jsTypeScriptTailwind CSSReduxShadCN UIMUIThree.js

Backend

5 tools
Node.jsExpress.jsNestJSGraphQLPrisma

Database

3 tools
MySQLMongoDBPostgreSQL

Other

5 tools
DockerGitGitHubREST APIsFirebase
Experience

A timeline of building

From early MVPs to production SaaS — here's where I've shipped real software.

  • 2024 — Present

    Full Stack Developer

    Cartrabbit

    Building the eCommerce SaaS platform and Shopify app powering 50+ merchants — owning frontend architecture and backend services across multiple modules.

    • Architected and shipped an eCommerce SaaS platform and Shopify App within 12 months.
    • Owned and engineered ~70% of the frontend architecture using React and TypeScript.
    • Built merchant dashboards supporting Reviews, Loyalty, Referrals, and Membership modules.
    • Developed a visual workflow automation builder (similar to Zapier) using React Flow, used by 50+ merchants.
    • Designed and implemented backend services for the Referral module using Node.js, Express, PostgreSQL, and Prisma ORM.
    • Improved dashboard performance by 25% and reduced onboarding friction by 35%.
    ReactTypeScriptNode.jsExpressPostgreSQLPrismaReact Flow
  • 2023 — 2024

    Full Stack Engineer

    NextOne Solutions

    Partnered with early-stage teams to ship MVPs end-to-end — from product discovery to deployment.

    • Shipped 6+ production web apps across e-commerce, scheduling, and analytics.
    • Built reusable component libraries adopted across multiple products.
    • Implemented CI/CD pipelines reducing release time from hours to minutes.
    ReactNext.jsNode.jsMongoDBFirebase
Selected work · 16+ shipped

Featured projects

A handful of projects I've built end-to-end — from architecture to deployment. Many more shipped — browse the archive below.

E-commerce SaaS Platform & Shopify App
FeaturedProject · 01
Live in production

E-commerce SaaS Platform & Shopify App

Built a production-grade SaaS platform and Shopify application enabling merchants to manage reviews, loyalty programs, referrals, and membership systems. The platform includes a visual workflow automation builder allowing merchants to configure triggers and actions using a drag-and-drop interface.

Core Modules
  • Visual Workflow Automation
  • Advanced Referral Engine
  • Loyalty & Rewards System
  • Reviews & Social Proof
  • Tiered Membership Plans
  • Shopify & WooCommerce Support
Business Impact
50+
Active Merchants
-35%
Onboarding Friction
ReactNext.jsTypeScriptReact FlowNode.jsPostgreSQLPrismaRedis
Visit Yuko
NextOne 3D
Project · 02

NextOne 3D

Interactive 3D web experience for showcasing products and immersive scenes, built with React Three Fiber.

ReactNext.jsThree.jsReact Three Fiber+1
Demo
Furniture Configurator
Project · 03

Furniture Configurator

3D product configurator with real-time material, color, and component swapping — perfect for visual commerce.

ReactThree.jsReact Three FiberTailwind CSS
Demo
Knee Pre-op Planning
Project · 04

Knee Pre-op Planning

Domain-specific 3D tool for visualising anatomical models — built for surgical pre-operative planning.

ReactThree.jsReact Three FiberTypeScript
Demo
Archive

More projects

A selection of other client websites, 3D experiences, and platforms I've shipped along the way.

Browse all on Linktree

Chair Configurator

Interactive 3D

ReactThree.jsR3F

Ship Configurator

Interactive 3D

ReactThree.jsR3F

The Fusion Apps

AI / Business Intelligence

Next.jsTailwindTypeScript

Nexus Tech School

EdTech

Next.jsTailwindCMS

AMIZH Birth & Yoga

Wellness Platform

Next.jsTailwind

NextOne Solutions 2.0

Agency · Web 3.0

Next.jsThree.jsFramer Motion

DreamStrokes Wedding

Client Website

Next.jsTailwind

Travigo Taxi

Booking Platform

ReactNode.jsTailwind

MacroLoop Technologies

Corporate Site

Next.jsTailwind

Cognoid Systems

Corporate Site

ReactTailwind

A3FusionTech

IT Services

Next.jsTailwind

AI Phen

Digital Marketing

Next.jsTailwind
Contact

Get in touch

Always happy to chat — whether it's a quick question, an idea, or just to say hi. The fastest way to reach me is over email, and I usually respond within a day.

nishanthsebastin498@gmail.com
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