AJ

Freelance Full-Stack Developer for End-to-End Product Development

I build and ship web applications, SaaS products, internal platforms, dashboards, APIs, and business systems - from frontend to backend, database, deployment, and payments.

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Web + backend + databases + integrations + deployment

10,000+ Students Served*
450+ Faculty Users*
9 Departments*
Web + Mobile + AI Systems
Payments + Subscriptions
Offline-First Architecture

Problems I Solve

From greenfield SaaS products to internal business tools and database refactoring, I take full ownership of web product delivery.

SaaS & Web Applications

Build complete web products with frontend UI, backend APIs, database models, authentication, billing, and cloud deployment.

Internal Business Systems

Replace spreadsheets and disconnected tools with purpose-built operational platforms, approval workflows, and administrative portals.

APIs & Backend Architecture

Build secure REST APIs, third-party integrations, JWT/OAuth authentication flows, background queues, and data microservices. See AI Development for intelligent pipelines.

E-commerce & Corporate Portals

Build B2B/B2C commerce experiences with product catalogs, inquiry flows, Razorpay/Stripe billing, and SEO-driven SSR pages.

Dashboards & Admin Platforms

Turn raw database tables into responsive real-time dashboards, role-based analytics, and audit logging portals.

Product Modernization

Improve existing applications through schema optimization, query tuning, security hardening, component refactoring, and API speedups.

Selected Production Web Work

Proven full-stack implementations spanning institutional platforms, enterprise manufacturing systems, and offline-first SaaS products.

High-Scale Institutional Platform

Unified Students Insight Platform - Serving 10,000+ students and 450+ faculty

Live Platform Source Code

A large-scale college platform combining feedback collection, attendance tracking, surveys, academic records, reporting, dashboards, and multi-department administrative workflows for Panimalar Engineering College.

The Problem

Needed to handle thousands of concurrent student feedback submissions and generate real-time multi-department reporting without database bottlenecks.

Engineering Highlights

  • Role-based access (Students, Faculty, HOD, Admin)
  • Multi-department reporting across 9 departments
  • MySQL database indexing & query optimization
  • PHP backend with asynchronous Ajax data fetching
  • Real-time attendance analytics dashboards

Outcome & Metrics

Operational institutional platform across 9 academic departments.

Portfolio-Reported Scale: 10,000+ students · 450+ faculty · 40% MySQL query latency reduction
Enterprise Manufacturing Software

Genuine Engineering ERP - Built a 19-stage manufacturing workflow & ERP system

Live Demo Source Code

A production-oriented manufacturing system tracking jobs end-to-end from RFQ through feasibility, quotation, purchasing, design, production, quality, assembly, and dispatch.

The Problem

Custom manufacturing orders were delayed by fragmented communication, missing approval chains, and lack of real-time audit visibility.

Engineering Highlights

  • Next.js & TypeScript full-stack application
  • 19-stage sequential approval workflow engine
  • Prisma ORM with Supabase PostgreSQL
  • Role-based access control (RBAC) & audit log
  • Cloudflare R2 attachment uploads & overdue triggers

Outcome

Complete manufacturing operational system with 19 distinct stage gates and immutable audit trails.

Production Capability: 19 approval stages · RBAC · Audit trail
Offline-First SaaS CRM

HaulTracker - Built an offline-first CRM for freight brokers

Live App

A mobile-first SaaS CRM designed for small freight brokers who need fast load entry, atomic driver locking, and reliable workflows even in low-connectivity environments. For mobile native apps, see Mobile Apps.

The Problem

Freight brokers operating in poor cellular areas lost draft load entries and suffered data loss during dispatch.

Engineering Highlights

  • IndexedDB caching of last 500 load records
  • FIFO write queue & Service Worker background sync
  • AES-256-GCM encryption for phone numbers
  • JWT HTTP-only cookies & CSRF protection
  • Razorpay subscription checkout billing

Outcome

Live SaaS product with local-first reliability and bank-grade data security.

Security & Stack: AES-256-GCM · Service Workers · Razorpay
B2B Corporate Commerce

NS Giftings - Built a B2B corporate-gifting platform

Live Portal

A Next.js wholesale platform supporting product discovery, bulk corporate inquiry workflows, content management, and SEO-focused server-side rendering.

The Problem

Corporate gifting vendor needed a high-performance web catalog with instant search and search engine visibility to drive inbound B2B quotes.

Engineering Highlights

  • Next.js SSR architecture for instant search indexing
  • Firebase realtime catalog database
  • Bulk inquiry quote requests & email webhooks

Outcome

Operational B2B website handling corporate quote requests.

Portfolio-Reported Outcome: Reached #1 branded Google search ranking during launch

Why Work Directly With Me?

One Engineer Across the Stack

You don't need to coordinate separate frontend, backend, and database developers. I handle the architecture, code, APIs, and infrastructure end-to-end.

Product-Minded Implementation

I focus on user flows, edge cases, data validation, and real business objectives - not just checking off developer tasks.

Production Database & Backend Design

Schema design, query latency reduction, multi-tenant isolation, RBAC, and audit logging are built into the architecture from day one.

Production Security & Payments

AES-256 encryption, JWT + CSRF protection, payment gateway integration (Razorpay/Stripe), and error tracking (Sentry) come standard.

How the Engagement Works

A clear, transparent process from initial requirement to shipped product.

01

Define the Problem

We identify what you're building, the target users, core business workflows, and what needs to exist for the initial release.

02

Scope the Build

I break the project into technical specifications, database schemas, API contracts, third-party integrations, and milestones.

03

Build & Test

Development proceeds across the full stack - frontend UI, REST backend, database migrations, security checks, and testing.

04

Deploy & Ship

I handle production deployment (Vercel, GCP, Docker), SSL setup, database provisioning, domain configuration, and handoff.

05

Ongoing Support

Continued improvements, new feature additions, monitoring, and technical maintenance available on a retained basis.

Project Fit

Good Fit If You Need

  • A SaaS MVP or custom web application built from scratch.
  • An internal business platform, ERP, or admin dashboard.
  • An existing web codebase audited, fixed, or modernized.
  • REST APIs, auth, databases, payments, or third-party webhooks.
  • A full-stack developer to take complete technical ownership.

Probably Not a Fit If

  • You need a static template page with no custom code.
  • You require a large multi-agency team with non-technical managers.
  • You want design mockups without any full-stack implementation.
  • You are looking for pure WordPress / page-builder setup.

Technologies I Work With

Frontend

React Next.js TypeScript JavaScript (ES6+) Tailwind CSS HTML5 / CSS3

Backend Frameworks

Node.js Express FastAPI Spring Boot PHP REST APIs

Databases & Caching

PostgreSQL MySQL Supabase Prisma ORM Firebase IndexedDB Redis

Infrastructure & DevOps

Docker Vercel Google Cloud Platform (GCP) Cloudflare R2 GitHub Actions

Security & Payments

Razorpay JWT / CSRF AES-256-GCM RBAC Access Control Sentry Monitoring

Frequently Asked Questions

Can you build the entire application?

Yes. I work across frontend, backend, database architecture, authentication, integrations, payments, deployment, and production fixes depending on what your project requires.

Can you work on an existing codebase?

Yes. Existing applications can be audited, fixed, extended, modernized, or completed without rebuilding everything from scratch. I regularly refactor legacy projects and improve query speeds.

Do you build SaaS products?

Yes. Relevant work includes business platforms, subscription checkout systems, admin dashboards, multi-tenant workflows, security hardening, and production web applications.

Can you handle deployment?

Yes. Production deployment and configuration (Vercel, GCP, Docker containers, Supabase) can be included alongside core software development.

Do you work with international clients?

Yes. I work remotely with startups, founders, and businesses across the US, UK, Canada, Australia, Singapore, UAE, and Europe. Communication is async-friendly with overlap hours.

How does pricing work?

I offer fixed-scope project pricing, MVP development packages, and ongoing engineering support. Get in touch for a quote tailored to your project requirements.

Let's build the thing you're trying to ship.

Tell me what you're building, where you are today, and what you need help with. I'll review the requirements and determine the most practical way to move forward.

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