Open to SDE-II / Senior Frontend roles

ManasRaj

Frontend Engineer · React & React Native

My core expertise includes React, JavaScript, TypeScript, React Native, Redux, and modern frontend architecture. At Spinny, I've owned and shipped products end-to-end across payments, service booking, SEO, design systems, and consumer-facing experiences. I've also worked extensively on frontend performance, including reducing unnecessary re-renders, code splitting, lazy loading, virtualization, and Core Web Vitals optimization.

Download resume

AI triage agent · live demo

25errors→2tickets

2 enriched Jira bugs. One command drafts the fix and raises a PR.

+10% lead conversion20–30% faster pages3M monthly users on checkout25 → 2 daily errors to triage~100% transaction success+8–9% Spinny Pro visits20–25% faster approvals

Featured work

Four things I'd show you first

Spinny · Engineering

AI triage agent

25→2

daily candidates to actionable tickets

Problem: Daily Sentry errors produced about 25 candidates to sort through by hand.
Built: A scheduled agent with Claude Code and Bitbucket Pipelines that turns each day's Sentry errors into enriched Jira bugs with root-cause analysis. A one-command flow drafts the fix and raises a PR.
Result: 25 daily candidates cut to 2 actionable tickets.

Claude Code
Bitbucket Pipelines
Sentry
Jira

Spinny · Care & Pro

Spinny Pro service booking

+8–9%

user visits on the Pro desktop website

Built: The Spinny Pro desktop website independently, for service booking and management. The Adhoc Approval Flow in Spinny Care so technicians send car-parts approvals in-app. A payment checkout that reduced cash transactions and enabled fully digital records and refunds. An SEO Car Service Cost Calculator.
Result: User visits up 8–9%. Turnaround and manual work down 20–25%. The calculator ranks on Google's first page.

React
TypeScript
TanStack Query
SEO

Spinny · Design system

SPEED design system

SPEED

used all over Spinny

Context: SPEED is the shared design system behind Spinny's products.
Built: Worked on SPEED, contributing reusable components and standardized UI patterns that teams build on.
Result: The system is used all over Spinny, so screens stay consistent and teams reuse components instead of rebuilding them.

Design Systems
Component library
UI patterns

Airtel Payments Bank

Payment checkout in React Native

monthly active users on checkout

Context: UPI, wallet and checkout flows used by millions every month.
Built: A scalable React Native payment checkout covering the full range of transaction edge cases. Backend-driven widgets for APB Wallet and saved cards with card encryption and MPIN validation. UPI onboarding with health callouts for unavailable banks. SIM-binding checks for wallet transactions.
Result: About 100% transaction success on the wallet and saved-card widgets. UPI onboarding improved success rate by 2%. SIM-binding added 1%.

React Native
Payments
Design Systems

Experience

Where I've shipped

Jan 2025 – PresentGurgaon

SDE-II at Spinny

India's full-stack used-car platform. Consumer web, Spinny Care, Spinny Pro and the React Native app.

Developed the Spinny Consumer Sell Homepage from scratch with a simpler journey, lifting lead conversion by 10%.
Built the Spinny Pro desktop website independently for service booking and management, growing user visits by 8–9%.
Optimized the React codebase with memoization, dynamic imports and virtualization, improving CLS, FPS and LCP for 20–30% faster page performance.
Built a scheduled AI triage agent with Claude Code and Bitbucket Pipelines that turns daily Sentry errors into enriched Jira bugs with root-cause analysis, cutting 25 daily candidates to 2 actionable tickets, with a one-command flow that drafts the fix and raises a PR.
Built the Adhoc Approval Flow in Spinny Care so technicians send car-parts approvals in-app, reducing turnaround and manual work by 20–25%.

Show 7 more

Built an SEO-optimized Car Service Cost Calculator that ranks on Google's first page.
Constructed the Spinny Care payment checkout, reducing cash transactions and enabling fully digital records and refunds.
Developed the refurbishment Catalogue Page from scratch with TanStack Query, improving page-load speed and API performance.
Migrated the Spinny mobile app from React Native 0.72 to 0.80 and enabled support for newer platform requirements, including 16 KB Android page-size.
Built a car inspection scheduling feature that streamlines booking and tracking.
Contributed reusable components and standardized UI patterns to the shared Spinny Design System.
Integrated WebView flows inside the mobile app and resolved navigation and cross-platform communication issues.

React
React Native
TypeScript
TanStack Query
Claude Code
Bitbucket Pipelines

Oct 2023 – Jan 2025Gurgaon

Software Engineer at Airtel

Airtel Payments Bank. UPI, wallet and checkout flows used by millions every month.

Architected a scalable React Native payment checkout for 3M monthly active users, covering the full range of transaction edge cases.
Built backend-driven widgets for APB Wallet and saved cards with card encryption and MPIN validation, reaching ~100% transaction success.
Developed Airtel UPI onboarding (improving success rate by 2%), plus health callouts for unavailable banks for a further 1.5% lift.
Implemented SIM-binding checks for wallet transactions, reducing fraud and improving success rate by 1%.
Developed UPI payments in Airtel's web repo with seamless VPA handling and intent/callback integration.

Show 1 more

Contributed to air-widget-library and air-design-system, Airtel's shared component architecture used across multiple products.

React Native
React
JavaScript
Payments
Design Systems

Jun 2022 – Dec 2022Bengaluru

Software Developer Intern at Niyo

Niyo Solutions Inc. Internal customer-support workbench, KYC and onboarding APIs.

Enhanced the internal search functionality, fixing bugs and adding a new feature.
Added a customer's live photo with liveness and face-match scores to the workbench, integrating the backend API with data served from an AWS S3 bucket.
Built a workbench toggle to enable or disable a customer's Biometric KYC, calling one API instead of three and saving about 600 ms.
Added KYC mode and KYC status to the customer profile page, saving customer-support executives time.
Built bulk enable and disable of full KYC for authorized users, saving time and improving security.
Worked on the PAN Verification and Wealth API migrations, both part of customer onboarding.

Internal tools
KYC
AWS S3
API migration

Projects

Things I've built on my own

Interview Buddy

In progress · 2026

AI interview simulator for frontend engineers

Realistic frontend interview practice with an adaptive AI interviewer and live voice answers.

Round 1, Round 2 and System Design modes across three difficulty levels.
Gemini-powered interviewer that adapts follow-ups from structured state.
Voice answers with Gemini transcription, text-to-speech replies and a session timer.
Scorecards across technical depth, communication and problem-solving.

React
TypeScript
Zustand
Express
Gemini
Firebase

Source

TalentLens

2025

AI hiring platform for candidates and recruiters

Resume scoring, job matching and application tracking, with a recruiter dashboard that ranks applicants.

AI resume scoring against a job description, with strengths, improvements and keyword match and miss analysis.
Candidates save up to four role-specific resumes and apply with the best match in one click.
Recruiter dashboard to post jobs, review applicants and rank candidates.

React
TypeScript
Firebase
Groq LLM

Live demo Source

DiscoverSearchCartCheckoutOrdersAddressesDiscoverSearchCartCheckoutOrdersAddresses

Foodie

React Native CLI

Food ordering app for iOS and Android

Browse restaurants and dishes, build a cart, check out and track past orders, with a companion admin portal.

Restaurant and dish discovery with a category carousel and search.
Cart, checkout with payment-method selection, and order history in Cloud Firestore.
Google Sign-In and Firebase email-link auth, plus saved addresses with device geolocation.
App state split into Context and useReducer slices.

React Native
Firebase Auth
Cloud Firestore
React Navigation

App source Admin portal

DietBuddy

Expo

AI nutrition and workout companion

Log a meal by photo, voice note or text. Gemini estimates calories and macros.

Meal capture from camera, photo library or a voice recording, analysed by Gemini 1.5 Flash.
Goal-based onboarding (bulking or cutting) that sets daily calorie, protein and carb targets.
Custom blurred bottom tab bar with a centre action button, and light and dark themes.

React Native
Expo
Gemini API
Zustand
React Navigation

Source

Multiplayer Chess

Personal

Real-time chess with rooms and match history

Create a private room, invite a friend and play live, with profiles and a history of past matches.

Real-time gameplay and game-state sync over Socket.IO.
Move logic for every piece written from scratch.
Custom-designed board UI with reworked login and room flows.

React
Socket.IO
Firebase

Live demo Source

Pulse Fit Gym

Weekend build

Minimal, responsive landing page

A clean, fast gym landing page built in two days with Next.js.

Next.js

Live demo Source

Skills

The toolkit

Languages

JavaScript
TypeScript
HTML
CSS

Frontend & Mobile

React
React Native
Redux
Zustand
TanStack Query
Vite
Webpack
SSR
WebView

APIs & Real-time

Node.js
Express
REST
GraphQL
Socket.IO
Firebase

Performance & Quality

Core Web Vitals
Performance Profiling
Lighthouse
Chrome DevTools
Accessibility
Design Systems

Tools & Practices

Git
Bitbucket
Jira
Agile
Claude Code
Data Structures & Algorithms
OOP

Mentoring

Prepping for a frontend interview?

Book a 1:1 session with me on Topmate for frontend, interview prep and career guidance.

Book on Topmate → topmate.io/manas_raj_mnit

Education

Academics

Malaviya National Institute of Technology (MNIT), Jaipur

B.Tech, Electrical Engineering2019 – 20237.75 / 10 CGPA

90.4%Class XII (CBSE, PCM)

10 / 10Class X (CBSE) CGPA

Contact

Hiring for a frontend or React Native role?

I usually reply within a day. Email is the fastest way to reach me.

Click to copy

LinkedIn/in/manas-raj-mnit

↗

GitHub/Manasdangi

↗