Niraj Kumar

Engineering Manager

Bengaluru, Karnataka, India14 yrs 1 mo experience
Most Likely To SwitchHighly Stable

Key Highlights

  • Engineered solutions for 25M+ users.
  • Boosted mobile performance by 70%.
  • Delivered secure systems with advanced encryption.
Stackforce AI infers this person is a seasoned expert in Gaming and Fintech, specializing in scalable mobile and web applications.

Contact

Skills

Core Skills

React NativeReactNode.jsAndroid Development

Other Skills

AgileAndroid SDKAndroid StudioCCI/CDClean ArchitectureCore JavaData StructuresEclipseFirebaseImage CachingJSONJavaScriptJenkinsKotlin

About

With 13+ years of hands-on experience, I specialize in building secure, scalable, and high-performing mobile and web platforms using React Native, React, TypeScript, Android, and Node.js. I’ve engineered solutions that power apps and SPAs for 25M+ users, consistently driving performance, reliability, and security at scale. My work spans gaming, fintech, and e-commerce, across companies like Games24x7, Simpl, Snapdeal, and Samsung. Key highlights include: ⚡ Boosted mobile launch performance by 70% with offline caching, optimized session lifecycle, and modular reusable components 🌐 Improved web SPA load times by 50% with webpack code-splitting, Lighthouse audits, and bundle optimization 🛠️ Architected modular cross-app repositories (private npm), cutting integration cycles from 2 days to 30 minutes 🔐 Delivered secure systems with SSL pinning, AES encryption, and OAuth2/JWT authentication 🤖 Integrated AI/ML & GenAI (AWS Bedrock, RAG, Vector DB) into apps and workflows for measurable productivity gains 🚀 Automated CI/CD pipelines across mobile and web, ensuring zero Sev-1 incidents and incident-free deployments I’m passionate about coding at scale, performance engineering, and developer productivity, blending mobile + web + GenAI to push the limits of what’s possible. Always open to connecting with peers and leaders who are building the future of apps, web, and platforms.

Experience

Games24x7

3 roles

Engineering Manager

Promoted

Jun 2025Present · 9 mos

  • Led architecture/code reviews and best practices for React Native/React apps serving 25M+ users.
  • Improved micro-frontend SPA Add Cash webpage load time by 50% using webpack code-splitting after Lighthouse performance review and web-pack-bundle analysis.
  • Owned technical roadmap for My11Circle (25M+ users), delivering 99.999% crash-free React Native/React apps with high performance and security.
  • Mentored 15+ engineers, driving Agile teams with focus on automation, secure coding, and delivery excellence.
React NativeReactNode.jsAgilePerformance Engineering

SDE-3

Promoted

Apr 2021Jun 2025 · 4 yrs 2 mos

  • Boosted app launch performance 70% via offline caching, session lifecycle optimization, and modular reusable components, validated with Firebase Performance API.
  • Revamped live contest features with Winner Reactions and Instagram-style Stories, driving 5%
  • revenue growth and 70% higher user engagement.
  • Architected a base repository for cross-app modular features (private npm), streamlining workflows for 4 FE teams and cutting merge time from 2 days to 30 minutes.
  • Ensured zero Sev-1 incidents and zero rollbacks over 2 years through proactive monitoring and 100% unit test coverage.
React NativeReactNode.jsFirebaseAgile

SDE-2

May 2018Apr 2021 · 2 yrs 11 mos

  • Architected modular Android systems (analytics, attribution, sockets) using MVVM + Clean
  • Architecture, driving 10% increase in retention and 5% revenue growth.
  • Implemented end-to-end Jenkins CI/CD pipeline for Android app builds, reducing manual effort and
  • deployment time.
Android DevelopmentMVVMClean ArchitectureJenkins

Simpl

Android Developer

Dec 2016May 2018 · 1 yr 5 mos · bangalore

  • Built merchant SDKs and CI/CD pipelines, enabling faster, reliable deployments and boosting sales by
  • 30%.
  • Championed TDD and Agile practices, improving development cycle efficiency by 20%.
  • Developed Android apps using MVVM and Clean Architecture for scalable, maintainable solutions.
Android DevelopmentCI/CDTDDAgile

Snapdeal

Lead Software Engineer

Jul 2015Dec 2016 · 1 yr 5 mos · Gurgaon, India

  • Architected and launched Exclusively Fashion mobile app (Android/iOS) from scratch, leading cross-
  • functional team across full SDLC.
  • Implemented secure online payment aggregator module and optimized image caching, improving
  • performance and security standards.
Android DevelopmentSecure Payment SystemsImage Caching

Sonim technologies

Senior Software Engineer

Sep 2014Jul 2015 · 10 mos · Bengaluru Area, India

  • Developed sensor-based Sonim Protect application from scratch, ensuring reliability, scalability, and
  • robust mobile architecture.
Mobile ArchitectureSensor Development

Samsung electronics

Senior Software Engineer(S.S.E.)

Mar 2012Sep 2014 · 2 yrs 6 mos · Bengaluru Area, India

  • Core contributor to Contact and System framework team, developing foundational mobile system components and frameworks.
Mobile System Development

Education

Jabalpur Engineering College

Bachelor of Engineering (B.E.) — Computer Science and Engineering

Jan 2007Jan 2011

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