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Sagar prajapati

Open to work3 years experience

Frontend Engineer

New Delhi, IndiaTarget Roles: Backend Engineer • Full-Stack Developer • Frontend Specialist

Frontend Engineer with 3.5 years building high-performance React.js and Next.js applications.

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Standing Rank

Rank Not Available

Developer Badges

Badges Pending

Skills & Technologies

33 skills
react.jsnext.jstypescriptjavascriptreact hooksredux toolkitzustandreact queryssrssgisrserver componentscode splittinglazy loadingcore web vitalscomponent librarydesign systemrest apismicro-frontendsnode.jsexpress.jsjwt authmongodbpostgresqljestreact testing librarytailwind cssmaterial uidesign tokenswebpack 5vitegitpostman

Work Experience

Frontend Engineer

Jarvis Technology and Strategy Consulting

Dec 2023 - Present New Delhi
  • Improved application performance by reducing bundle size 30% and eliminating 40% of unnecessary re-renders — implemented route-level code splitting with React.lazy/Suspense and migrated global state from Redux to Zustand, driving an 8% lift in user engagement.
  • Architected a shared UI component library with design tokens across 4 product modules, saving 2 dev-days per sprint.
  • Engineered React Query hooks for unified data-fetching, caching, and error/loading state across 8+ product features — cutting API integration time by 30%.
  • Led Angular v14 → v21 migration resolving Webpack 5 build conflicts and transitioning NgModule to standalone components — unblocking a 6-month stalled release pipeline.

Frontend Engineer

Pizeonfly

Jan 2023 - Dec 2023 New Delhi
  • Led JavaScript-to-TypeScript migration across an active production codebase, reducing production bug reports by 30% within 3 months.
  • Integrated 10+ RESTful APIs with JWT auth and secure token storage, reducing auth-related support tickets by 25%.
  • Established Jest + React Testing Library suite with 70%+ coverage of critical UI components, cutting regression bugs by 35%.

Projects

Real-Time Matchmaking Platform

View Project
Node.jsExpress.jsMongoDBSocket.IOReact.jsJWT
  • Developed full-stack MERN matchmaking platform with swipe/match engine, Socket.IO real-time chat, and geolocation-based discovery.
  • Implemented MongoDB indexing, aggregation pipelines, Redis OTP/session caching with TTL expiry, and cursor-based pagination for concurrent session handling.
  • Secured all endpoints with JWT authentication and RBAC, scoping data access per user role across the Express.js API.

Cross-Framework UI Component Library

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Stencil.jsTypeScriptWeb Components
  • Designed a Stencil.js component library compatible with React, Vue, and vanilla JS — fully typed with TypeScript, improving UI consistency and reducing onboarding effort.

Interactive Developer Portfolio

View Project
React.jsCSS AnimationsNetlify
  • Crafted an interactive RPG-style React portfolio showcasing frontend engineering projects and animations.

Leaderboard Standings

Leaderboard Position Pending

Global test scores, peer standing percentiles, and algorithm leaderboard ranks are updated dynamically.

Assessment Highlights

Assessments Not Completed

Coding evaluations, system assessment results, and conceptual score badges will appear here after taking a test.

AI Collaboration Score

AI Collaboration Score Pending

Developer coding behavior, assistant cooperation, and AI pair-programming indicators are evaluated during live coding sessions.

Role Compatibility Profile

Role Compatibility Analysis Pending

Custom matching reports, candidate role compatibility percentiles, and core engineer strength profiles are processed once conceptual code screenings are complete.

Achievements

Performance Optimization and Efficiency Gains

Reduced bundle size by 30%, cut re-renders by 40%, and saved 2 dev-days per sprint.

About Details

Professional Bio

Frontend Engineer with 3.5 years building high-performance React.js and Next.js applications in production. Reduced bundle size by 30%, cut re-renders by 40%, and saved 2 dev-days per sprint through performance optimization, state management migration, and shared component library architecture.

B.Tech (ECE) in ECE

Manav Rachna International Institute of Research and Studies (2018 - 2022)

Diploma (ECE) in ECE

Ganga Technical Campus, Bahadurgarh (2015 - 2018)

Languages: English, Hindi
Email: Locked