Sandeep Kumar

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Years Exp

40%

Tech Debt Cut

30%

Less Deploy Errors

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About Me

Software Developer with 4+ years of experience delivering enterprise-grade web applications for Fortune 500 clients — Verizon and AT&T using React.js, Next.js, and Micro Frontend (MFE) architecture. Proven track record of migrating legacy JSP systems to Next.js, reducing technical debt by 40%, and scaling a Progressive Web App across 6 international markets with full i18n support for KFC. Adept at driving quality, achieving 85% unit test coverage, resolving 200+ SonarQube quality issues, and reducing deployment errors by 30% via GitLab CI/CD pipelines. Targeting engineering roles where performance optimization, clean architecture, and measurable product impact are priorities.

Scalable Applications

Modern Tech Stack

Team Collaboration

Performance Optimization

Technical Skills

Frontend

React.js

Next.js

JavaScript (ES6+)

TypeScript

HTML5

CSS3

Sass

Tailwind CSS

Bootstrap

Material UI

Architecture & State

Micro Frontend (MFE)

Redux

Zustand

Context API

Component-Driven Development

Single Page Applications (SPA)

Backend & APIs

Node.js

Express.js

MongoDB

REST API Integration

Spring Boot

Java

JWT Authentication

Postman

Testing & Quality

Jest

React Testing Library

SonarQube

BrowserStack

Unit Testing

Integration Testing

Code Reviews

DevOps & Tools

Git

GitHub

GitLab

CI/CD Pipelines

Agile/Scrum

JIRA

Rally

Kibana

AWS

AI-Assisted Dev

GitHub Copilot

Cursor

VS Code

IntelliJ IDEA

Projects & Experience

Jun 2022 – Present

Verizon Assisted Sales Platform

Cognizant Technology Solutions

Enterprise Single Page Application (SPA) supporting Verizon's Retail, Care, Tele Sales, BYOD, and Trade-In flows built on Micro Frontend (MFE) architecture.

Technologies:

React.jsReduxPrimeReactMicro FrontendJWTKibanaJIRA

▸Built reusable React and PrimeReact components aligned with Verizon's design system, accelerating feature delivery across multiple sales flows.
▸Architected Redux state management for compensation and customer hierarchy modules, improving data predictability and cutting related bug count by 30%.
▸Integrated 10+ REST APIs across SOE, CXP, and CJCM cross-functional teams, bridging frontend and Java backends for end-to-end data reliability.
▸Resolved 20+ JIRA-tracked defects across sprint cycles, maintaining release stability and earning direct client appreciation.

Jun 2022 – Present

AT&T Internal Tools Migration

Cognizant Technology Solutions

Full-scale migration of legacy JSP-based dashboards to a modern Next.js architecture to enhance scalability and maintainability.

Technologies:

Next.jsReact.jsZustandTailwind CSSJavaGitHubRally

▸Migrated 5+ production modules from legacy JSP to Next.js, reducing technical debt by 40% measured against backlog reduction and maintainability benchmarks.
▸Designed a Zustand state management layer for complex dashboard views, ensuring predictable client-side data handling and eliminating redundant re-renders.
▸Resolved 50+ Rally-tracked issues while integrating 10+ Java REST APIs, consistently delivering features on schedule across all sprint cycles.
▸Collaborated directly with AT&T client stakeholders in daily Agile/Scrum ceremonies, driving iterative requirement refinement across 5+ migrated modules.

Jun 2022 – Present

KFC Global Ordering PWA

Cognizant Technology Solutions

Progressive Web App (PWA) for KFC food ordering deployed across 6 international markets with full multi-language (i18n) support.

Technologies:

React.jsReduxNode.jsExpress.jsMongoDBBootstrapSass.NETGitLab CI/CD

▸Engineered a multi-language PWA using React and Redux, deploying across 6 international markets with full i18n support and region-specific content management.
▸Built a reusable component design system that reduced QA design defects by 40% and standardized UI consistency across all markets.
▸Developed a Node.js and Express.js admin dashboard backed by MongoDB, enabling internal teams to manage menus, promotions, coupons, and content at scale.
▸Integrated 10+ third-party and internal APIs spanning ordering flows, payment processing, and real-time delivery tracking across all regions.
▸Resolved 100+ JIRA issues in partnership with CMS and .NET teams, maintaining dynamic content accuracy across all markets.
▸Implemented GitLab CI/CD pipelines that cut deployment errors by 30% and shortened release cycle times, reducing DevOps dependency.

Feb 2022 – Jun 2022

Diagnostic Medical Centre Web App

Cognizant Technology Solutions (Intern)

Full-stack patient records and appointment management system with secure access controls and modern UI.

Technologies:

HTML5CSS3JavaScriptSpring BootSQL

▸Designed responsive UI using HTML5, CSS3, and JavaScript for patient records and appointment management.
▸Developed RESTful backend with Spring Boot and SQL, implementing CRUD operations, role-based authentication, and secure access controls.

Education

B. Tech in Electronics and Communication Engineering

GMR University

2019-2022

Diploma in Electronics and Communication Engineering

SMVM Polytechnic

2016-2019

Key Achievements

Notable Accomplishments

Eliminated 40% of AT&T's frontend technical debt by leading a full JSP-to-Next.js migration across 5+ production modules.

Elevated unit test coverage from 60% to 85% using Jest and React Testing Library, directly reducing production bugs by 25%.

Standardized UI consistency by 40% at KFC Global through a reusable component design system, tracked by QA defect rate reduction.

Resolved 200+ SonarQube code quality issues, measurably reducing security vulnerabilities and improving overall codebase health scores.

Owned end-to-end CI/CD pipeline implementation on GitLab, reducing deployment errors by 30% across all release cycles.

Recognized as Associate of the Month and recipient of multiple client appreciation awards for delivering high-quality solutions under tight deadlines.

Get In Touch

I'm always open to discussing new opportunities and interesting projects. Feel free to reach out!

Phone

+91 9398415617

sandeepkumargella@gmail.com

Connect with me

Location

Hyderabad, India