Sarvagya singh

Full-Stack Software Engineer

Delhi NCR, India 1+ yrs exp 82 · Excellent

About

Full-Stack Software Engineer who builds, ships, and optimizes production-grade web apps with the MERN stack, TypeScript, and React/Redux. Delivered a ∼100x dashboard query optimization (40s → 400ms) and owns features end-to-end across frontend and backend. Strong in REST API design, microservices, Redis caching, RabbitMQ, and cloud deployment (Docker, AWS), with solid CS fundamentals (250+ DSA on LeetCode, 9.2 CGPA, Top-25 GGSIPU). Owns systems from a ∼200x throughput lift down to a single UI feature.

Skills & Expertise (42)

React.js Advanced

7.5/10

Years Exp

JavaScript Intermediate

7.0/10

Years Exp

GitHub Intermediate

7.0/10

Years Exp

REST APIs Intermediate

7.0/10

Years Exp

Node.js Intermediate

7.0/10

Years Exp

CSS3 Intermediate

7.0/10

Years Exp

HTML5 Intermediate

7.0/10

Years Exp

Git Intermediate

7.0/10

Years Exp

Next.js Intermediate

6.5/10

Years Exp

Responsive Design Intermediate

6.5/10

Years Exp

Express.js Intermediate

6.5/10

Years Exp

Typescript Intermediate

6.5/10

Years Exp

LINUX Intermediate

6.0/10

Years Exp

Postman Intermediate

6.0/10

Years Exp

Agile Intermediate

6.0/10

Years Exp

Scrum Intermediate

6.0/10

Years Exp

MySql Intermediate

6.0/10

Years Exp

AWS EC2 Intermediate

6.0/10

Years Exp

Docker Intermediate

6.0/10

Years Exp

MongoDb Intermediate

6.0/10

Years Exp

Postgresql Intermediate

6.0/10

Years Exp

OAuth 2.0 Intermediate

6.0/10

Years Exp

JWT Intermediate

6.0/10

Years Exp

REDUX Intermediate

6.0/10

Years Exp

SQL Intermediate

6.0/10

Years Exp

MariaDB Intermediate

5.5/10

Years Exp

Redis Intermediate

5.5/10

Years Exp

Python Intermediate

5.5/10

Years Exp

Microservices Intermediate

5.5/10

Years Exp

Material-UI Intermediate

5.5/10

Years Exp

Event-Driven Systems Intermediate

5.5/10

Years Exp

Caching Intermediate

5.5/10

Years Exp

Socket.IO Intermediate

5.0/10

Years Exp

Supertest Intermediate

5.0/10

Years Exp

Vitest Intermediate

5.0/10

Years Exp

Java Intermediate

5.0/10

Years Exp

Rate Limiting Intermediate

5.0/10

Years Exp

Sequelize Intermediate

5.0/10

Years Exp

Prisma Intermediate

5.0/10

Years Exp

WebSockets Intermediate

5.0/10

Years Exp

Claude Beginner

4.0/10

Vercel

Work Experience

Software Developer (Full-stack)

Kraftshala

Mar 2026 - Sep 2026

Re-architected data-heavy dashboard queries with a deferred-join pattern (∼40s → ∼400ms, ∼100x faster) and built the resizable/exportable React/Redux tables that consume them. Built a self-service Google Chat alerting platform end-to-end — SQL-rule engine + per-minute cron on the backend and the full admin UI in React/Redux — giving teams instant alerts for issues like server downtime or a dropping lead count instead of catching them hours later; later reused by other teams. Engineered a bulk Excel upload engine (validation, parsing, deduplication) processing 1,000+ records/upload with React upload modals, cutting manual effort by ∼80%. Implemented Google OAuth 2.0 SSO (backend verification + login UI) and integrated Zoom, CRM, and payment APIs with conflict-detection (HTTP 409) to prevent double-bookings. Shipped a Placements Opportunity Tracker end-to-end — reusable audit-log + transactional owner reassignment (backend), an inline owner editor with XLSX export (React), and a listing-query rewrite (6 subqueries → 1 join). Re-architected calendar-invite delivery via AWS SES, decoupling event creation from email to lift throughput ∼2,000/day → 400,000/day (∼200x) behind default-off feature flags.

Full-Stack Developer

BWS

Jul 2025 - Dec 2025

Built and deployed an end-to-end AI chatbot on the company website with the MERN stack (MongoDB, Express, React, Node.js), automating responses to 100+ visitor queries and reducing manual support load. Implemented a “Request a Callback” feature that captured form submissions and synced leads to Zoho CRM via REST API, streamlining the sales handoff for 200 leads. Optimized on-page SEO and Core Web Vitals — cut LCP by removing a large hero image and trimming heading size, lifting Lighthouse score 88 → 95 and page load time ∼8s → ∼2s.