Harshit Joshi
Harshit Joshi avatar

Harshit Joshi

AI-native Full Stack Developer

Overview

Software Engineer @ KoinX
India
()

Social Links

LinkedInharshit-joshi05GitHubHarshit-3905X (formerly Twitter)@Harshit3905LeetCodeHarshit_3905 · Knight

About

Full-stack engineer with 1+ years of experience building and shipping scalable, production-grade software.

  • Software Engineer at KoinX, shipping backend systems for a crypto tax platform used by thousands of investors.
  • Built a Cursor SDK pipeline that detects bad exchange uploads and opens fix PRs — plus 25+ exchange and blockchain integrations.
  • I ship full-stack products end to end, from RAG chat with cited answers to video APIs serving aggregated data at scale.

GitHub Contributions

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1,131 contributions in the last year on GitHub.LessMore

Stack

Languages
  • Java
  • JavaScript
  • TypeScript
  • SQL
Frontend
  • React.js
  • Next.js
  • Tailwind CSS
  • Zustand
  • Framer Motion
  • shadcn/ui
Backend
  • Node.js
  • Express.js
  • REST APIs
  • NATS
  • Auth.js
  • Drizzle ORM
Databases
  • MongoDB
  • PostgreSQL
  • Redis
  • Qdrant
AI / ML
  • OpenAI API
  • LangChain
  • RAG
Cloud / DevOps
  • AWS (S3, CloudFront, EC2)
  • Docker
  • GitHub Actions

Experience

KoinX

Remote

  • Built an automation pipeline to detect invalid rows from exchange file uploads, then used the Cursor SDK to generate fix pull requests, reducing manual data remediation.
  • Refactored the Bybit integration pipeline with failure checkpointing and sequential processing, cutting DB calls by 93% and eliminating race conditions on retries.
  • Streamlined price fetching using bulk cache reads/writes, reducing O(N) database queries to chunked operations and improving performance by 75%.
  • Node.js
  • Express.js
  • MongoDB
  • Redis
  • NATS
  • Docker
  • Node.js
  • Express.js
  • MongoDB
  • REST APIs

Vexio

Remote

  • Next.js
  • TailwindCSS
  • Zustand
  • Framer Motion

Education

Kalyani Government Engineering College

Jul 2021 — Jun 2025B.Tech in Information TechnologyWest Bengal, India
  • CGPA 8.83/10

Achievements

Projects(3)

  • Multi-user RAG chat app delivering cited answers with grounded refusals, built with Next.js, LangChain, OpenAI, PostgreSQL/Drizzle, and Qdrant.
  • Auth.js + Google OAuth for authentication and cross-device history merge.
  • Rate limiting, idempotent ingest CLI, and a Vitest/Playwright/CI eval suite — 90% retrieval hit rate, 90% citation compliance, and 92% refusal accuracy.
  • Next.js
  • LangChain
  • OpenAI API
  • PostgreSQL
  • Drizzle ORM
  • Qdrant
  • Auth.js
  • Vitest
  • Playwright
  • Blogging platform built with React.js, Tailwind CSS, and Appwrite, using code splitting to improve load performance.
  • AWS S3 and CloudFront for scalable hosting and efficient content delivery.
  • Automated deployment and cache invalidation via GitHub Actions to ensure updated content access.
  • React.js
  • TailwindCSS
  • Appwrite
  • AWS S3
  • CloudFront
  • GitHub Actions

Harshit Joshi

© 2026 · Built with Next.js & Tailwind CSS