Krish Vachhani

Software Engineer · Bangalore, India · krishvachhani01@gmail.com · krishvachhani.in

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Summary

Full Stack Software Engineer with over 2 years of experience in building scalable production systems using TypeScript, React, Node.js, and PostgreSQL. Delivered features for platforms serving over 18 million users, with expertise in distributed backends, payments, real-time architectures, and CI/CD. Possesses strong algorithmic foundations and a proven track record of delivering reliable, high-impact products.

Experience

Aug 2025 - Present

Remote

Software Engineer, Laugh Logic Labs

Node.js, TypeScript, PostgreSQL, PostGIS, Redis, BullMQ, Socket.io, Razorpay

Developed a Swiggy/Zomato-style food-delivery backend for 4 client apps (customer, restaurant, rider, admin) on Node.js/TypeScript with BullMQ workers.
Created an expanding-radius rider dispatch on PostGIS with 1-km rings up to 5 km, a 30-second BullMQ acceptance window, and a Redis first-accept claim.
Engineered an idempotent Razorpay payment flow using 2 paths (webhook and verify), HMAC signatures, and a Redis lock ensuring exactly-once processing.
Automated weekly RazorpayX payouts via a 3-step flow (contact, fund account, IMPS) using idempotency keys, locks, TDS deduction, and Puppeteer PDFs.
Implemented real-time order tracking with socket.io and a Redis adapter for live status and rider GPS updates across horizontally-scaled API instances.

Jun 2024 - Jul 2025

On-site, Mumbai

Software Engineer, Zeus Learning

React, TypeScript, Node.js, Express.js, JavaScript, RESTful APIs, CI/CD

Led the development of a large-scale e-learning platform utilized by over 18M students and 2M educators for a major USA-based publisher.
Developed and refined reusable question-type modules using React and TypeScript to enhance scalability of assessments and integrate RESTful APIs.
Optimized Node.js APIs and mobile-first UI flows, achieving a 30% reduction in assessment errors while improving performance and engagement through effective CI/CD practices.

Jan 2024 - May 2024

Remote, Mumbai

Software Engineer Intern, Zeus Learning

React, TypeScript, Node.js, Express.js, JavaScript, CSS3

Triaged and resolved frontend bugs in an e-learning assessment platform for a large USA-based publisher using React and TypeScript.
Enhanced user flows and engagement, leading to a 15% increase in user interaction.
Resolved issues across multiple question types, improving platform stability and reducing user-reported bugs by 20%.
Improved accessibility to WCAG 2.1 standards and ensured cross-browser compatibility across modern browsers.

Projects

Live

PathCraft

React, Vite, Node.js, Express.js, MongoDB, Auth0, Google Gemini, Tailwind CSS

Built PathCraft, a full-stack AI course platform that generates structured learning paths from prompts, used by 70+ users.
Tracked 1,300+ user events using Google Analytics (GA4), including course generation, lesson views, and interaction flows.
Collected qualitative feedback from early users on X (Twitter) to validate problem-solution fit and identify improvement areas.
Designed a modular lesson engine supporting 5+ content types, including MCQs, code blocks, text, and video suggestions.

www.pathcraft.dev

Live

Whiteboard Application

React, JavaScript, HTML5 Canvas, Tailwind CSS, React Context API

Built a browser-based whiteboard application using React and HTML5 Canvas, enabling low-latency drawing with smooth rendering.
Implemented real-time drawing with 4+ tools (brush, shapes, text, arrows) using efficient canvas rendering and event-driven updates.
Managed application state using React Context API to support scalable tool interactions and drawing workflows.
Enabled undo/redo functionality and PNG export, supporting complete drawing lifecycle and improving usability.

whiteboard-app-kohl.vercel.app

Live

Trustyle

Next.js, TypeScript, Tailwind CSS, Strapi CMS, Framer Motion, EmailJS

Built Trustyle, a full-stack business platform managing 75+ products with real-time updates via Strapi CMS.
Architected the system using Next.js (frontend) and Strapi CMS (backend) for dynamic product and content management.
Deployed using SSR/SSG with frontend on Vercel and backend on Render, integrating 3+ services including Google Maps, EmailJS, and Framer Motion.

www.trustyle.co.in

Skills

Area	Tools
Core stack	JavaScript (ES6+), TypeScript, React.js, Next.js, Node.js, Express.js, PostgreSQL, MongoDB, C++
Foundations & tools	Data Structures & Algorithms, OOP, REST APIs, SQL, Docker, Git, AI tools, Redis, BullMQ, Socket.io, PostGIS

Education

2020 - 2024

CGPA: 9.64 / 10.00

Charotar University of Science and Technology

B.Tech in Computer Science and Engineering

Awards

Qualified for ICPC Gwalior-Pune Regionals and ICPC Amritapuri Regionals, showcasing expertise in algorithms and data structures.
Solved over 400 DSA problems on LeetCode and 350+ on Codeforces, achieving a maximum rating of 1214 (Pupil); secured 1st place in Codepie 2.0 and CodeRatri among 180+ and 200+ participants.
Served as a Beta Microsoft Learn Student Ambassador, organizing technical events for over 200 students and enhancing presentation, collaboration, and documentation skills.