<Senior Frontend Engineer />

const engineer = "HASSAN RAZA"

// I build data-intensive, high-performance interfaces that scale with complex business workflows.

8+ years crafting production-grade React and TypeScript applications — from advertiser dashboards at Walmart Global Tech to logistics platforms and consumer super apps. Specialized in state management architecture, secure API integration, and accessible component systems.

Open to Senior Frontend Engineer, Staff Engineer, and Lead Frontend roles — India or International

Download CVContact
Bengaluru, India
+91 7836049914Email
Performance-firstState architectureAccessible UIsMicroservices integrationMentorshipEnterprise scale

Professional Summary

Overview

I'm a Senior Frontend Engineer with 8+ years of experience building scalable, high-performance web applications using React.js, TypeScript, Redux, and Zustand. I specialize in data-intensive interfaces and API-driven applications for complex business workflows — most recently at Walmart Global Tech, where I built advertiser tooling used across enterprise-grade campaigns.

I bring strong experience integrating microservice-based backend systems and secure APIs, with a focus on performance, security, and maintainable frontend architecture. I'm comfortable leading architectural decisions, mentoring teams, and shipping features that hold up under real-world scale.

How I work

Principles

Performance is non-negotiable

Lighthouse 95+, code splitting, memoization, and bundle optimization are baselines, not afterthoughts.

Architecture before features

Scalable state management patterns and reusable component abstractions reduce tech debt across the whole team.

Security-conscious integration

Authentication, RBAC, and safe API patterns are part of the frontend contract, not just the backend's job.

Accessible by default

ARIA compliance and WCAG 2.1 standards ship with every component, not bolted on at the end.

principles.ts

export const principles = {
performance: 'measurable',
components: 'reusable',
state: 'predictable',
interfaces: 'accessible',
}

Core Expertise

Strengths

React & TypeScript

Production-grade React.js and TypeScript applications with a strong emphasis on type safety, reusable abstractions, and long-term maintainability.

State Management Architecture

Scalable patterns with Redux Toolkit, Redux Saga/Thunk, Zustand, and Context API — chosen per project complexity to keep data flow predictable across large teams.

Performance Optimization

Code splitting, memoization, lazy loading, and bundle optimization — consistently hitting Lighthouse scores above 95 on data-heavy dashboards and logistics apps.

Component Systems & Design

Building ARIA-compliant, reusable UI component libraries adopted across multiple teams — reducing development effort and enforcing visual consistency at scale.

API & Microservices Integration

REST APIs, WebSockets, and microservice-based backend systems — including authentication, authorization, and RBAC for enterprise applications.

Accessibility (WCAG 2.1)

ARIA-compliant components with keyboard navigation, semantic HTML, and screen reader support baked in from the start — not retrofitted.

Technical Leadership

Frontend architecture discussions, code reviews, mentoring junior engineers, and driving best practices that improve team-wide quality and delivery speed.

Testing & Quality

Jest, React Testing Library, and Vitest for unit and integration coverage — paired with CI/CD pipelines and code review practices that keep regressions out of production.

Selected Achievements

Impact

Bravo Award — Walmart Global Tech

Recognised for outstanding engineering contributions on the DSP advertiser platform

~20% application performance improvement

Rendering optimization, efficient state patterns, and component-level tuning on enterprise campaign dashboards at Walmart

30% reduction in development effort

Reusable, ARIA-compliant UI components adopted across multiple Walmart teams, cutting redundant build time significantly

25% faster page loads at Shipsy

Resolved React rendering bottlenecks in data-heavy logistics dashboards; achieved Lighthouse scores above 95

78% codebase reduction at Dew Solutions

Re-architected bill payment system into a reusable component structure, slashing complexity and maintenance overhead

50% faster feature development

Reduced time-to-ship for new payment categories through modular architecture and shared component patterns

//

Key Projects

DSP Advertiser Platform — Walmart Global Tech

React • TypeScript • Redux Toolkit • REST APIs • RBAC

  • ▸Built scalable React/TypeScript applications for advertiser workflows, campaign management, and reporting dashboards used enterprise-wide
  • ▸Integrated secure REST APIs with authentication, authorization, and role-based access control for high-stakes business operations
  • ▸Designed reusable, ARIA-compliant UI components adopted across multiple teams, reducing development effort by 30%
  • ▸Led frontend architecture discussions and established state management patterns using Redux Toolkit and Zustand

EXIM Logistics Platform — Shipsy

React • Preact • REST APIs • Microservices • Chrome Extension

  • ▸Reduced page load time by 25% in data-heavy logistics dashboards by identifying and eliminating React rendering bottlenecks
  • ▸Achieved Lighthouse scores above 95 through code splitting, memoization, and bundle optimization
  • ▸Built a Chrome extension tracking module using Preact, consuming REST APIs and microservices for real-time cargo visibility across 30+ countries

Tata Neu Super App — Dew Solutions

React • PWA • Component Architecture

  • ▸Re-architected the bill payment system into a reusable component structure, reducing the codebase by 78%
  • ▸Cut development time for adding new payment categories by 50% through modular architecture
  • ▸Built a consumer-facing Progressive Web Application for bill payments, mobile recharges, and digital transactions

Juntos — Co-watch Video App

Socket.IO • YouTube API • Webpack • Babel • CI/CD

  • ▸Built synchronized video playback and real-time chat using Socket.IO and YouTube API with modular class-based frontend architecture
  • ▸Used Webpack, Babel, and CI/CD pipelines to streamline deployments and maintain build reliability

JD Academy — E-learning Mobile App

React Native • Native Base UI • SQLite

  • ▸Built video player, quiz, and notes modules from scratch using React Native and Native Base UI for Android and iOS
  • ▸Improved maintainability through modular component architecture and implemented auto OTP read with smooth animations

Professional Experience

Timeline

Software Engineer III

Oct 2021 — Present

Walmart Global Tech, Bengaluru

  • ▸Developed scalable React and TypeScript applications for advertiser workflows, campaign management, and reporting dashboards
  • ▸Integrated secure REST APIs with authentication, authorization, and RBAC to support enterprise-grade business operations
  • ▸Improved application performance by ~20% through rendering optimization, efficient state management patterns, and component-level tuning
  • ▸Designed reusable, ARIA-compliant UI components adopted across multiple teams, reducing development effort by 30%
  • ▸Led frontend architecture discussions and established scalable state management patterns using Redux Toolkit and Zustand
  • ▸Collaborated closely with backend teams to integrate microservice-based systems and deliver reliable, API-driven user experiences
  • ▸Conducted code reviews, mentored junior engineers, and promoted frontend engineering best practices across the team

Software Engineer L2

Jan 2021 — Oct 2021

Shipsy, Gurugram

  • ▸Reduced page load time by 25% in data-heavy logistics dashboards by identifying and resolving React rendering bottlenecks
  • ▸Optimized frontend performance through code splitting, memoization, and bundle optimization, achieving Lighthouse scores above 95
  • ▸Built Chrome extension tracking module using Preact, consuming REST APIs and microservices for real-time cargo tracking across 30+ countries

Software Engineer

Feb 2020 — Dec 2020

Dew Solutions, Gurugram

  • ▸Re-architected bill payment system into reusable component architecture, reducing codebase by 78%
  • ▸Reduced development time by 50% for adding new payment categories through modular component design
  • ▸Built consumer-facing PWA for Tata Neu — bill payments, mobile recharges, and digital transactions

Associate IT

Mar 2018 — Feb 2020

Daffodil Software, Gurugram

  • ▸Built responsive, cross-browser web applications using JavaScript (ES6+), HTML5, and CSS3
  • ▸Created schema-driven dynamic table components reducing redundant JSX and improving UI reuse
  • ▸Integrated frontend systems with secure backend services and RESTful APIs
  • ▸Mentored junior developers and conducted technical code reviews