# Ajmal Hussain — Full Stack Software Engineer

> Full Stack Software Engineer with 3+ years of production experience building high-performance web applications, enterprise ERP systems, FinTech payment integrations (Helcim, Razorpay, Stripe), and granular Role-Based Access Control (RBAC) architectures.

## Professional Summary
- **Name**: Ajmal Hussain
- **Title**: Full Stack Software Engineer
- **Experience**: 3+ Years in Production Software Engineering
- **Current Employer**: Techuniqueiit Solutions LLP (New Delhi, India)
- **Location**: New Delhi, Delhi, India / Katihar, Bihar, India
- **Portfolio Website**: https://www.ajmal.website
- **GitHub**: https://github.com/ajmal-stack
- **Email**: ajmal0ktr@gmail.com
- **Phone / WhatsApp**: +91 8228805415 (https://wa.me/918228805415)
- **LinkedIn**: https://linkedin.com/in/ajmal-hussain-stack

---

## Technical Stack & Core Competencies

### Frontend Engineering
- **Frameworks & Libraries**: React.js 19, Next.js 15 (App Router, Server Components, SSR, SSG, ISR), TypeScript, JavaScript (ES6+)
- **Styling & UI Systems**: Tailwind CSS, CSS Modules, Responsive Design, Dark/Light Themes
- **State Management & Data Fetching**: TanStack Query (React Query), Context API, React Hooks, Optimistic UI Updates
- **Data Visualization & Media**: Recharts, PDFKit, Canvas / SVG Data Visualizers
- **Internationalization (i18n)**: Multilingual routing, Right-to-Left (RTL) Arabic localization

### Backend & API Architecture
- **Runtime & Frameworks**: Node.js, Express.js, Next.js Server Actions & API Routes
- **API Paradigms**: RESTful API design, Microservices architecture, Webhook processing
- **Security & Auth**: JWT (JSON Web Tokens), Session Management, Role-Based Access Control (RBAC), Route Guard Middleware, Rate Limiting, CORS, Helmet, Data Sanitization
- **Transaction Processing**: Multi-document ACID Transactions, Idempotency keys, HMAC signature validation

### Databases & Data Modeling
- **NoSQL**: MongoDB, Mongoose ODM (Aggregation pipelines, Mass-balance calculations, Indexing, Schema validation)
- **Relational / SQL**: MySQL (Normalized relational schemas, Joins, Constraints)

### FinTech & Payment Gateway Integrations
- **Helcim**: Helcim Pay JS embedded tokenized checkout, Webhook signature verification, Idempotent transaction ledgers
- **Razorpay**: Orders API, Signature validation, Payment capture, Refund workflows
- **Stripe**: Payment Intents API, Webhook idempotency, Customer portal
- **PayPal & Clover**: PayPal SDK integrations, POS API data exchange

### DevOps, Tooling & Cloud
- **CI/CD & Hosting**: Vercel Edge Network, Automated deployment pipelines, Zero-downtime releases
- **Version Control**: Git, GitHub workflows
- **Testing & Tooling**: Postman, REST Clients, Jest, ESLint, TypeScript Strict Mode, Antigravity AI / Cursor

---

## Production Projects & Case Studies

### 1. Stone Crusher Operations ERP (Enterprise ERP)
- **Status**: In Production
- **Tech Stack**: React.js, Node.js, Express.js, MongoDB, Mongoose, Tailwind CSS, TanStack Query, Recharts, JWT Auth, PDFKit
- **Overview**: Mission-critical industrial ERP engineered for commercial quarries and stone crushing plants. Unifies automated weighbridge hardware integration, statutory mining royalty compliance, double-entry financial ledgers, and live aggregate crushing yield analytics with multi-tier RBAC.
- **Key Features & Engineering Highlights**:
  - End-to-end dispatch state machine: Gate Entry → Gross Weighment → Statutory Royalty Validation → Tare Weighment → Ledger / GST Invoice → Gate Pass issuance in <30 seconds.
  - Hardware integration: RS232 serial hook & sensor protocol parsers for automated tamper-proof gross/tare weighment capture.
  - Statutory compliance engine: Calculates mining royalty and transit passes (e-Ravanna / e-Way bills) with automated government quota reconciliation.
  - Mass-balance Aggregation pipeline: Tracks transformation of raw boulder stone into graded aggregate outputs (10mm, 20mm, 40mm, GSB, M-Sand) and computes crushing yield and plant downtime metrics.
  - Offline-first sync: Client-side IndexedDB queue with background sync worker for uninterrupted operations in remote quarry zones during cellular dropouts.
  - Multi-tier RBAC: Granular access control for Super Admins, Plant Managers, Weighbridge Operators, and Accountants with immutable append-only audit trails.

### 2. Restaurant Management & Ordering Platform (FoodTech)
- **Status**: Live on Vercel
- **Live URL**: https://frontend-theta-two-eh8vrf7x5c.vercel.app/
- **Tech Stack**: Next.js, React.js, Node.js, Express.js, MongoDB, Helcim Pay JS, Tailwind CSS, TanStack Query
- **Overview**: Full-stack food ordering and restaurant management platform featuring dynamic culinary catalogs, real-time stateful cart drawer, and integrated credit card checkout.
- **Key Features & Engineering Highlights**:
  - Helcim Pay JS integration with tokenized credit card processing and cryptographic HMAC webhook verification.
  - Idempotent transaction ledger in MongoDB preventing double-billing and state corruption on payment retry events.
  - Sub-200ms catalog filter response times via TanStack Query caching and optimistic UI cart updates.
  - Real-time order summary drawer with dynamic tax and delivery fee calculation.

### 3. TechUniqueIIT Corporate Platform & CMS (Enterprise Corporate)
- **Status**: Live on Vercel
- **Live URL**: https://www.techuniqueiit.com/
- **Tech Stack**: Next.js App Router, React.js, TypeScript, Node.js, Express.js, MongoDB, Tailwind CSS, Recharts, Vercel CI/CD
- **Overview**: High-performance enterprise corporate IT portal featuring an interactive product catalog, JWT-authenticated blog CMS, job applicant tracking system, and live traffic analytics.
- **Key Features & Engineering Highlights**:
  - 98+ Google Lighthouse Core Web Vitals score achieved using Next.js App Router SSG/SSR hybrid architecture with WebP image optimization and global Edge CDN caching.
  - Custom JWT-authenticated Admin CMS for blog publishing, career application pipelines, and lead routing.
  - Real-time visitor analytics dashboard built with MongoDB Aggregations and Recharts.
  - Automated Vercel CI/CD deployment pipelines with TypeScript build checks and atomic releases.

### 4. Rahmat Medical Tourism Platform (Healthcare)
- **Status**: Live on Vercel
- **Live URL**: https://rahmat-medical-tourism.vercel.app/en
- **Tech Stack**: Next.js App Router, React.js, TypeScript, Node.js, Express.js, Tailwind CSS, i18n Localization, Vercel CI/CD
- **Overview**: Cross-border medical tourism portal connecting international patients with JCI/NABH-accredited Indian hospital networks (Apollo, Fortis, Medanta).
- **Key Features & Engineering Highlights**:
  - Multilingual localization pipeline (`[locale]`) with full English and Right-to-Left (RTL) Arabic support.
  - Interactive surgical cost calculator comparing international procedure prices with transparent Indian hospital packages.
  - HIPAA-conscious tele-consultation booking workflow with encrypted medical history and diagnostic report upload handling.
  - Programmatic SEO with dynamic medical schema metadata and JSON-LD structured data.

---

## Work Experience

### Full Stack Engineer — Techuniqueiit Solutions LLP
- **Duration**: Jun 2023 – Present (3+ Years)
- **Location**: New Delhi, Delhi, India (On-site)
- **Key Responsibilities & Achievements**:
  - Shipped 4 major production platforms: Stone Crusher ERP, Restaurant Ordering System, Corporate Portal, and Cross-Border Medical Tourism platform.
  - Architected multi-role RBAC security layers and JWT session middleware across client enterprise systems.
  - Engineered multiple payment processing gateways (Helcim, Razorpay, Stripe) with webhook idempotency and audit logs.
  - Managed Vercel CI/CD automated release pipelines with zero major production rollback incidents.

### Full Stack Developer Trainee — Techuniqueiit Solutions LLP
- **Duration**: Dec 2022 – Jun 2023 (7 Months)
- **Location**: New Delhi, Delhi, India
- **Key Responsibilities & Achievements**:
  - Mastered full-stack engineering with React, Next.js, Node.js, Express, and MongoDB.
  - Developed CRUD modules, stateful components, database schemas, and API endpoints.
  - Collaborated in code reviews, testing, and continuous integration workflows; successfully promoted to full-time engineer.

---

## Education

- **Master of Computer Applications (MCA)**: Mangalayatan University (2024 – 2026, Completed, 73.5%)
- **Bachelor of Science in Information Technology (B.Sc. IT)**: Tilka Manjhi Bhagalpur University - TMBU (2018 – 2022, Completed, 72.5%)

---

## Key URLs & Resources

- **Portfolio**: https://www.ajmal.website
- **Sitemap**: https://www.ajmal.website/sitemap.xml
- **Robots.txt**: https://www.ajmal.website/robots.txt
- **LLMs.txt**: https://www.ajmal.website/llms.txt
- **Resume Download**: https://www.ajmal.website/FullStack-Ajmal-2026.pdf
- **GitHub Profile**: https://github.com/ajmal-stack
- **Direct Contact Form**: https://www.ajmal.website/#contact