AI Agents Read Page

# Bhupesh Kumar

## Role
Backend Engineer @dizzaract

## Summary
Backend engineer focused on scalable APIs, distributed systems, and cloud-native platforms with strong cost and performance focus.

## Location
India

## Contact
- Email: 4bhupeshkumar@gmail.com
- GitHub: https://github.com/Bhup-GitHUB
- X: https://x.com/bhupesh_ku36215
- LinkedIn: https://www.linkedin.com/in/bhupesh-k-185327366/
- Book Call: https://cal.com/bhupesh-kumar-91o6te/15min
- Resume: https://drive.google.com/file/d/1QN4Ad7cTMeNBeGYz3oCMeoSHA-DXvN8h/view?usp=sharing&usp=embed_facebook

## Skills
### Languages
- TypeScript
- JavaScript
- Go
- Python

### Backend
- Node.js
- Express
- Hono
- tRPC
- REST API
- Bun
- Kotlin
- Go Fiber
- gRPC
- WebSockets
- WebRTC
- Cloudflare Workers

### Database
- MongoDB
- PostgreSQL
- Redis
- Prisma
- Drizzle

### DevOps
- AWS
- Cloudflare
- Docker
- Nginx
- Git
- Kafka
- Kubernetes
- Terraform
- Prometheus
- Grafana

## Projects
### Electron P2P - Remote Code Execution
- Description: Electron + WebRTC app for direct peer communication and remote JavaScript/Python execution.
- Repo: https://github.com/Bhup-GitHUB/electron-p2p
- Stack: Electron, WebRTC, Socket.IO, Node.js, Docker

### Vibe Coding Platform - Cloud Workers
- Description: Worker service that scales AWS Auto Scaling groups for ephemeral VS Code Web instances.
- Repo: https://github.com/Bhup-GitHUB/vibe-cod-arch
- Stack: Node.js, TypeScript, Express 5, AWS SDK v3, Auto Scaling

### ACM PR Bot - AI Code Reviewer
- Description: Automated PR reviewer using AI to generate actionable code feedback and quality checks.
- Repo: https://github.com/ACM-Thapar/acm-pr-bot
- Stack: GitHub Actions, AI, Automation, Python

### Trading Platform Backend
- Description: Hono.js backend on Cloudflare Workers with KYC, fraud controls, broker management, and real-time workflows.
- Repo: https://github.com/Bhup-GitHUB/sebi-hackathon
- Live: https://sebi-hackathon.bkumar-be23.workers.dev/
- Stack: Hono.js, TypeScript, Cloudflare Workers, D1, JWT

## Blog Posts
- [How Swiggy Likely Designs Its Food Delivery System](https://bhupeshkumar.blog/blogs/swiggy-delivery-system-design) | April 25, 2026 | 18 min read | Tags: System Design, Swiggy, Logistics, Dispatch, Distributed Systems, Architecture
- [System Design: How "Only 3 Left in Stock!" Actually Works](https://bhupeshkumar.blog/blogs/system-design-how-only-3-left-in-stock-actually-works) | April 23, 2026 | 16 min read | Tags: System Design, E-Commerce, Distributed Systems, Caching, Redis, Architecture
- [Behind the Scenes: Building a Live Cricket Streaming Platform That Doesn't Crash at Toss Time](https://bhupeshkumar.blog/blogs/behind-the-scenes-building-a-live-cricket-streaming-platform-that-doesnt-crash-at-toss-time) | April 18, 2026 | 15 min read | Tags: System Design, Streaming, Go, AWS, Redis, PostgreSQL, Architecture
- [Bought My Small Home at 21](https://bhupeshkumar.blog/blogs/bought-my-small-home-at-21) | April 14, 2026 | 4 min read | Tags: Personal, Milestone, Life, Discipline
- [Fraud Detection Runs Inside the Payment, Not After It](https://bhupeshkumar.blog/blogs/fraud-detection-runs-inside-the-payment-not-after-it) | April 12, 2026 | 10 min read | Tags: FinTech, Fraud, Payments, Streaming, ML, System Design, Kafka
- [How Payment Reconciliation Systems Actually Work Behind the Scenes](https://bhupeshkumar.blog/blogs/how-payment-reconciliation-systems-work-behind-the-scenes) | April 10, 2026 | 9 min read | Tags: FinTech, Payments, Backend, Go, Reconciliation, System Design
- [College Placements Are Not a Safety Net](https://bhupeshkumar.blog/blogs/college-placements-are-not-a-safety-net) | April 8, 2026 | 6 min read | Tags: Career, College, Opinion, Growth, Layoffs, Skills
- [Why All UPI Apps Feel the Same Speed](https://bhupeshkumar.blog/blogs/why-all-upi-apps-feel-the-same-speed) | April 6, 2026 | 7 min read | Tags: UPI, FinTech, India, System Design, Payments, NPCI
- [Why Fintech Systems Don't Use Floating-Point Numbers for Money](https://bhupeshkumar.blog/blogs/why-fintech-systems-dont-use-floating-point-numbers-for-money) | April 5, 2026 | 6 min read | Tags: FinTech, Backend, System Design, Payments, Precision, Ledger
- [How BNPL Approves You in Seconds Using India's Financial Data Highway](https://bhupeshkumar.blog/blogs/how-bnpl-approves-you-in-seconds-india-financial-data-highway) | March 28, 2026 | 10 min read | Tags: FinTech, BNPL, System Design, Backend, India, Underwriting
- [Why Your Swiggy ETA Jumps Mid-Order — The 4 ML Models Behind "35 Min Delivery"](https://bhupeshkumar.blog/blogs/why-your-swiggy-eta-jumps-mid-order) | March 20, 2026 | 8 min read | Tags: System Design, Machine Learning, Backend, Swiggy, Zomato, Golang, ETA
- [How Blinkit, Zepto, Swiggy Instamart and BigBasket Deliver in 10 Minutes — and Why the Hard Part Has Nothing to Do with Speed](https://bhupeshkumar.blog/blogs/how-blinkit-zepto-swiggy-instamart-bigbasket-deliver-in-10-minutes) | March 20, 2026 | 8 min read | Tags: System Design, Backend, Quick Commerce, Redis, DynamoDB, ML, Golang
- [The Market Isn't Bad. You Just Stopped Evolving.](https://bhupeshkumar.blog/blogs/the-market-isnt-bad-you-just-stopped-evolving) | March 18, 2026 | 5 min read | Tags: Career, Opinion, AI, Internships, Growth
- [Your Delivery Rider's GPS Never Writes to a Database](https://bhupeshkumar.blog/blogs/delivery-rider-gps-never-writes-to-database) | March 14, 2026 | 7 min read | Tags: System Design, Backend, Real-Time, Redis, Kafka, Geolocation
- [I Fall Asleep in Seconds Now. Not Minutes — Seconds.](https://bhupeshkumar.blog/blogs/i-fall-asleep-in-seconds-now) | March 12, 2026 | 4 min read | Tags: Personal, Career, Startups, College, Reflection
- [Why OTPs Look the Same but Work Very Differently](https://bhupeshkumar.blog/blogs/why-otps-look-the-same-but-work-very-differently) | March 8, 2026 | 5 min read | Tags: Security, Authentication, Backend, System Design
- [How Bank Transfers Work](https://bhupeshkumar.blog/blogs/how-bank-transfers-work) | March 2, 2026 | 8 min read | Tags: System Design, Backend, Banking, Payments, Beginner
- [How UPI Payments Actually Work Under the Hood (A Beginner's Guide to System Design)](https://bhupeshkumar.blog/blogs/how-upi-payments-work-under-the-hood) | March 1, 2026 | 7 min read | Tags: System Design, Backend, UPI, Payments, Beginner
- [Why Your Payment Backend Needs a Dedicated Real-Time Layer (And How We Built One)](https://bhupeshkumar.blog/blogs/payment-backend-real-time-layer-propeller) | February 28, 2026 | 10 min read | Tags: Backend, System Design, WebSockets, gRPC, Redis, Real-Time, Payments
- [Anthropic Wants to Have Its Cake and Eat Yours Too](https://bhupeshkumar.blog/blogs/anthropic-hypocrisy) | February 24, 2026 | 5 min read | Tags: AI, Ethics, Anthropic, Opinion, Open Source
- [The "Girls Can't Tech" Myth Needs to Die](https://bhupeshkumar.blog/blogs/girls-cant-tech-myth) | February 21, 2026 | 5 min read | Tags: Opinion, Women in Tech, Culture, Diversity, Career
- [How Food Delivery Apps Show "PAID" Instantly on the Delivery Partner's Screen](https://bhupeshkumar.blog/blogs/how-food-delivery-apps-show-paid-instantly) | February 21, 2026 | 8 min read | Tags: Backend, Payments, WebSockets, System Design, Kafka, Redis, Real-Time
- [Louf for 2030](https://bhupeshkumar.blog/blogs/louf-for-2030) | February 14, 2026 | 5 min read | Tags: Life, Travel, Personal, Future, Reflection
- [Inside Payment Routing: How Razorpay Routes Your ₹100 Through 15+ Gateways in Milliseconds](https://bhupeshkumar.blog/blogs/inside-payment-routing-razorpay-gateways) | February 14, 2026 | 18 min read | Tags: Payments, Distributed Systems, Backend, Razorpay, Rust, System Design, Circuit Breakers, UPI
- [How Paytm and Google Pay Made QR Scanning Feel Instant](https://bhupeshkumar.blog/blogs/how-paytm-google-pay-qr-scanning-is-so-fast) | February 4, 2026 | 5 min read | Tags: Mobile, Computer Vision, Android, iOS, Payments, UPI, UX, Performance
- [Inside Moltbook: The First Social Network Where AI Agents Talk to Each Other](https://bhupeshkumar.blog/blogs/inside-moltbook-first-social-network-for-ai-agents) | February 1, 2026 | 12 min read | Tags: AI, Machine Learning, Social Networks, AI Agents, Experimental Tech, Multi-Agent Systems, AI Safety, Emergent Behavior
- [Why YouTube Uses Server-Sent Events (SSE) Over WebSockets: A Cost-Effective Architecture Decision](https://bhupeshkumar.blog/blogs/why-youtube-uses-sse-over-websockets-cost-effective-architecture) | January 29, 2026 | 18 min read | Tags: Architecture, Scalability, System Design, YouTube, Backend, SSE, WebSockets, Cost Optimization
- [Building Classio: A Serverless Deployment Platform](https://bhupeshkumar.blog/blogs/building-classio-serverless-deployment-platform) | January 28, 2026 | 12 min read | Tags: Backend, Serverless, Architecture, System Design, Bun, TypeScript
- [When Multiple Tech Stacks Actually Make Sense: Lessons from PhonePe and Super Apps](https://bhupeshkumar.blog/blogs/when-multiple-tech-stacks-make-sense-phonepe-super-apps) | December 27, 2025 | 15 min read | Tags: Architecture, Mobile Development, System Design, PhonePe, Super Apps, Team Organization
- [Why YouTube Live Chat Scales Without WebSockets](https://bhupeshkumar.blog/blogs/why-youtube-live-chat-scales-without-websockets) | December 17, 2025 | 12 min read | Tags: Architecture, Scalability, System Design, YouTube, Backend, CDN
- [Understanding How the YouTube Video Pipeline Works](https://bhupeshkumar.blog/blogs/inside-the-machine-youtube-video-pipeline) | December 17, 2025 | 15 min read | Tags: Architecture, Video Processing, System Design, YouTube, Backend, CDN, Transcoding
- [How 2025 Taught Me to Stand on My Own Feet](https://bhupeshkumar.blog/blogs/how-2025-taught-me-to-stand-on-my-own-feet) | December 15, 2025 | 6 min read | Tags: Personal, Growth, Reflection, Life Lessons, Resilience
- [How React Got Hacked: The Critical Server Components Vulnerability Explained](https://bhupeshkumar.blog/blogs/react-server-components-security-vulnerability-cve-2025-55182) | December 5, 2025 | 8 min read | Tags: Security, React, Web Development, Vulnerability, Server Components
- [How NPM Was Hacked: The Shai-Hulud Attack Explained Simply](https://bhupeshkumar.blog/blogs/npm-shai-hulud-attack-explained) | November 28, 2025 | 10 min read | Tags: Security, npm, JavaScript, DevOps, Supply Chain
- [Kimi 2: The Chinese Open-Source LLM Challenging GPT-4/5](https://bhupeshkumar.blog/blogs/kimi-2-chinese-open-source-llm-challenging-gpt) | January 25, 2025 | 12 min read | Tags: AI, Open Source, LLM, Machine Learning, Technology, China
- [StartDB Update: SQL Query Engine & B-Tree Indexing Now Live!](https://bhupeshkumar.blog/blogs/startdb-update-sql-query-engine-btree-indexing) | January 20, 2025 | 15 min read | Tags: Database, Go, SQL, B-Tree, Query Engine, StartDB
- [Why Cloudflare Workers AI is the Future of Serverless AI Development](https://bhupeshkumar.blog/blogs/cloudflare-workers-ai-future-serverless-ai-development) | November 7, 2025 | 12 min read | Tags: AI, Cloudflare, Serverless, Edge Computing, TypeScript
- [The AI Era: Let's Face the Truth](https://bhupeshkumar.blog/blogs/the-ai-era-truth) | October 20, 2025 | 6 min read | Tags: AI, Industry, Careers, Opinion
- [Building StartDB: The Future of AI-Powered Databases](https://bhupeshkumar.blog/blogs/building-startdb-ai-powered-database) | January 15, 2025 | 15 min read | Tags: Database, AI, Machine Learning, Go, TypeScript, Architecture
- [Building a Cal.com Clone for $50/Month: My System Architecture](https://bhupeshkumar.blog/blogs/cal-com-clone-architecture) | September 16, 2025 | 5 min read | Tags: Architecture, Cost Optimization, Scheduling, Cloudflare, AWS
- [How I Think Unacademy's Live Class Backend Works: A Technical Deep Dive](https://bhupeshkumar.blog/blogs/unacademy-backend-architecture) | August 29, 2025 | 8 min read | Tags: Backend, Architecture, Real-time, EdTech
- [Building a Serverless Trading Platform Backend: SEBI Hackathon Project](https://bhupeshkumar.blog/blogs/sebi-trading-platform) | September 1, 2025 | 8 min read | Tags: Backend, Trading, FinTech, Serverless, Security
- [Learning Advanced Backend Engineering by Building Mini-Automation Features](https://bhupeshkumar.blog/blogs/learning-advanced-backend-automation) | September 18, 2025 | 12 min read | Tags: Backend, Learning, Distributed Systems, Queues, Webhooks, Architecture
- [How I Got My First Internship Implementing Prometheus & Grafana (And Why You Should Learn It)](https://bhupeshkumar.blog/blogs/how-i-made-800-in-6-hours-prometheus-grafana) | January 4, 2026 | 18 min read | Tags: Monitoring, Prometheus, Grafana, DevOps, Backend, Observability

## Canonical Site
https://bhupeshkumar.blog