Ranjeet Singh

Software Engineer

Bengaluru, India 2+ yrs exp 86 · Excellent

About

Frontend Engineer with 3+ years of experience designing and building scalable B2C and C2C web applications using React and Next.js. Skilled in frontend architecture, performance optimization, testing, CI/CD, and developer tooling. Built and scaled products used by millions of users across web and mobile platforms.

Skills & Expertise (28)

React Advanced

8.2/10

Years Exp

Next.js Intermediate

7.6/10

Years Exp

Typescript Intermediate

7.5/10

Years Exp

Node.js Intermediate

7.5/10

Years Exp

Git Intermediate

7.0/10

Years Exp

REDUX Intermediate

7.0/10

Years Exp

Jest Intermediate

7.0/10

Years Exp

Flutter Intermediate

7.0/10

Years Exp

Express Intermediate

7.0/10

Years Exp

React Query Intermediate

6.5/10

Years Exp

Storybook Intermediate

6.5/10

Years Exp

GitHub Actions Intermediate

6.5/10

Years Exp

Postgresql Intermediate

6.5/10

Years Exp

Unit Testing Intermediate

6.5/10

Years Exp

React Testing Library Intermediate

6.5/10

Years Exp

React Native Intermediate

6.5/10

Years Exp

Zustand Intermediate

6.0/10

Years Exp

BLoC Intermediate

6.0/10

Years Exp

Tailwind CSS Intermediate

6.0/10

Years Exp

Material UI Intermediate

6.0/10

Years Exp

CSS Modules Intermediate

6.0/10

Years Exp

SCSS Intermediate

6.0/10

Years Exp

Dart Intermediate

6.0/10

Years Exp

Webpack Intermediate

6.0/10

Years Exp

TurboRepo Intermediate

5.5/10

Years Exp

Module Federation micro frontends Javascript (ES6+

Work Experience

SDE 2

Mercari Inc

Jul 2025 - Jan 2026

Designed and led the implementation of a centralized Account Hub serving 50K+ daily visits, enabling unified profile and account management across services while reducing platform fragmentation and improving UX. Implemented a scalable internationalization solution using i18next and Phrase, supporting localization across 3 languages and multiple markets. Designed and shipped a referral-based onboarding system, driving 5,000+ new user sign-ups in its first week. Authored a Technical Design Document defining system architecture, API contracts, and component boundaries, aligning cross-team development and reducing integration issues.

Software Developer

Cars24

Apr 2024 - Jul 2025

Boosted web application performance by ~20% through code splitting, memoization, and bundle optimization, reducing page load times and improving Core Web Vitals. Developed a reusable, accessible component library, documented with Storybook and validated through unit tests, enabling consistent UI development across teams. Contributed to the modernisation of a $300M+ revenue product using a Module Federation architecture, enabling independent feature development and deployment. Standardized server state management using React Query, enabling request caching, background synchronization, offline support, and consistent error handling. Engineered internal CLI tooling using Node.js to automate project scaffolding, reducing boilerplate setup time by 80% and ensuring architectural consistency across 4+ internal teams.

Software Developer

Gida Technologies

Sep 2022 - Nov 2023

Led and mentored a team of 6 frontend engineers, driving feature delivery and improving overall code quality. Developed an admin portal handling 1M+ users using React and Redux with live updates via API polling. Developed and launched a Flutter application from scratch that achieved 10M+ downloads across Android and iOS. Integrated CI/CD workflows using GitHub Actions, automating build, test, and deployment processes to improve release reliability. Incorporated Firebase (FCM, Analytics), deep linking, GoRouter, and BLoC to support scalable mobile application architecture. Implemented Google Fit, Fitbit, and Apple Health, designing robust data synchronization workflows across platforms.