Harsh Keshari
Software Developer
I build software. That's what I am.
Founding Engineer at Experiment Labs — built the LMS, CRM, AI interviewer, internship platform, payment infrastructure, and more from the ground up.
Nights and weekends: building Crelyzor — a workspace where your contacts, meetings, and tasks actually know about each other.
Open to full-time SWE roles
Currently Building
Crelyzor
An AI-native workspace where your contacts, meetings, and tasks are all connected — and actually talk to each other. Building from scratch as a solo founder.
Next.jsNode.jsPostgreSQLAI
Experience
Founding Engineer
Nov 2024 - Present
- ◦Built the entire platform from scratch — 11 microservices covering LMS, CRM, AI Interviewer, Smart Meeting Assistant, Recommendation Engine, Payments, Notifications, Auth, Internship Portal, Ops Dashboard, and Evaluator.
- ◦Designed the auth & RBAC system powering all services — 39+ permissions, 5 user roles, multi-tenant org isolation.
- ◦Built Smart Meeting Assistant — browser-based recording, Deepgram transcription, OpenAI-generated summaries and action items, with one-click push to student roadmaps.
- ◦Built AI Interviewer — Google Cloud Speech-to-Text, Vertex AI for question generation, video transcoding via Cloud Tasks.
- ◦Built recommendation engine using OpenAI embeddings + Pinecone vector search for AI-driven student career suggestions, which became a major revenue stream.
- ◦Engineered multi-channel notification service — email, SMS, WhatsApp — with Redis-backed state, scheduled cron reminders, and rate limiting.
- ◦Integrated Razorpay payment processing with webhook reconciliation, retry logic, and credit/subscription management.
- ◦Migrated infrastructure from AWS Lambda to EC2, eliminating timeout errors across all long-running operations.
Backend Developer
Sept 2024 - Nov 2024
- ◦Built the MVP backend for a hotel booking & management platform from scratch using Node.js and Express.
- ◦Designed and shipped REST APIs for room booking, availability management, and authentication.
Open Source Contributions
Nov 2023 - April 2024
- •Led the LaCE quality team at Oppia — managed contributor onboarding, task assignments, and code reviews across all user-facing features.
- •Shipped 10 merged PRs in Python and AngularJS — admin acceptance tests, topic editor migration, UI fixes, and e2e test coverage.
- •Completed a $150 bounty — fixed a critical search bar modal focus issue in the documentation site.
Projects
Nexus
Maintained- •Built a live contest portal used by 300+ students for real-time coding competition participation and standings on CodeChef.
- •Shipped both a student portal (enrollment, live standings) and a secure admin portal (profile management, data scraping, result generation).
- •Implemented web scraping to pull real-time user data from CodeChef and JWT-based auth via Passport.js.
Category:Full-Stack Development
Tech Stack:MERN Stack, Chakra-UI, Tailwind CSS
Bitcoin Wallet CLI
- •CLI tool to manage Bitcoin wallets, addresses, and transactions — wallet creation, address generation, balance checking, and transaction history.
- •Integrated Blockcypher API for real-time Bitcoin data.
Category:CLI / Systems
Tech Stack:Node.js, Blockcypher API
This journey continues... 🚀