Harsh Keshari
Software Engineer
I build software. That's what I am.
Open to full-time SWE roles
Live in Production
Crelyzor
All-in-one productivity SaaS for solo professionals — replaces HiHello (cards) + Cal.com (scheduling) + Otter.ai (meeting AI) + Todoist (tasks). Live with billing, AI meeting intelligence, and scheduling.
PERN StackTypeScriptLLM · GeminiDeepgram STTAI SummarizationAsk AI (SSE)Recall.aiBull · RedisDocker
Experience
Founding Engineer
Nov 2024 - Present
- ◦Built the recommendation engine on OpenAI embeddings + Pinecone vector search — the platform's primary revenue driver, serving 3,500+ personalized recommendations to students across 8 partner orgs (incl. Leverage Edu, PhysicsWallah).
- ◦Shipped an agentic AI learning copilot — LangGraph + Gemini agent with realtime voice (WebSocket); grounds replies on each student's progress and knowledge gaps via RAG over a 100+ skill library; tool-calling (GitHub, web search, tasks); regression-tested in CI by an LLM-as-judge grader calibrated to human ratings.
- ◦Architected the platform's 10 production microservices — core (Auth, CRM, Payments, Notifications), AI services (Recommendation Engine, Copilot, Smart Meeting Assistant, AI Interviewer), and product modules; built the central identity provider (auth-core, 92 Prisma models, 85 routes) with SSO, JWT + refresh sessions, Google/Zoom OAuth, and a cached RBAC engine enforcing multi-tenant org isolation.
- ◦Engineered Smart Meeting Assistant — transcribed 500+ counselor–student sessions with AI summaries auto-pushed to learner profiles; async Bull + Redis queue with a background worker batch-processing across orgs.
- ◦Developed AI Interviewer — Google Cloud Speech-to-Text for answers, Vertex AI for adaptive question generation and scoring, async video transcoding via Cloud Tasks.
- ◦Implemented Payments & Notifications — Razorpay subscription billing with webhook reconciliation; multi-channel (email, SMS, WhatsApp) transactional messaging with scheduled reminders.
- ◦Migrated long-running services (transcription, video, recommendation regeneration) from AWS Lambda to EC2, eliminating serverless timeouts; added cron monitors for payment reconciliation.
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
Claukit
Maintained- •Your Claude companion — a browser extension + CLI that surfaces token usage, cache reads, and rate limits in real time.
- •Shows input/output token counts per message, cache hit tracking, and visual usage bars for the 5-hour and 7-day limits with a reset countdown.
- •CLI renders auto-refreshing usage bars in the Claude Code status line; extension follows claude.ai's light/dark theme automatically.
Category:Developer Tools
Tech Stack:TypeScript, Browser Extension (Firefox/Chrome), Node.js CLI
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... 🚀