About

Amitesh Kumar

also known as Bhanu Stark

At 4 Way Technologies I hardened Spicychat for 3 million users — sliding-window rate limits, personalized AI push, AI+human moderation, and TTS over WebSockets for 600k premium users. I built The Kirana Point end-to-end — one API for POS, customer, and delivery — now running two marts. Public, my social super-app, has 100,000+ Play Store downloads.

I am a full-stack engineer. I ship product UI, APIs, and infrastructure that have to hold in production — not demos.

At 4 Way Technologies I hardened Spicychat for 3 million users: sliding-window rate limits, personalized AI push, AI+human moderation, and TTS over WebSockets for 600k premium users. I built The Kirana Point end-to-end — one API for POS, customer, and delivery — now running two marts. Public, my social super-app, has 100,000+ Play Store downloads.

I write about AI character platforms, production Node/realtime systems, and shipping grocery and social products in India. That writing is for operators and hiring managers, not generic tutorials.

Latest writing

Range

Frontend, backend, infrastructure.

Not a stack list — the work those layers actually had to do.

01

Frontend

React, Next.js, Redux, React Native / Expo / Capacitor, Electron POS, and Jetpack Compose. Barcode checkout on the desktop, location-based grocery on mobile, and a social feed that still feels instant.

  • React
  • Next.js
  • React Native
  • Electron
  • Jetpack Compose

02

Backend

Node/Express and Bun/Elysia. JWT + store-level RBAC, Socket.IO with a Redis adapter, and AI pipelines — moderation, unique push, TTS, tool-calling agents. One API serving admin, POS, customer, and delivery.

  • Node.js
  • Express
  • Bun / Elysia
  • JWT / RBAC
  • AI pipelines

03

Infrastructure

AWS (Lambda, S3, CloudFront, CloudWatch, EC2), Cloudflare, Redis / Momento, Docker, GitHub Actions and GitLab CI. Sliding-window rate limits designed for 3 million users — a foundation that grows without a rewrite.

  • AWS
  • Cloudflare
  • Redis
  • Docker
  • CI / CD

Education

Computer applications, twice.

  1. 2022–2024

    Master of Computer Applications (MCA)

    Galgotias University

  2. 2015–2018

    Bachelor of Computer Applications (BCA)

    Veer Kunwar Singh University, Ara

Stack

Tools that have shipped.

Languages, frontend, APIs, mobile, data, cloud, and AI — used in production, not collected.

Languages

  • TypeScript
  • JavaScript
  • Kotlin
  • HTML / CSS
  • Bash

Frontend

  • React
  • Next.js
  • Redux
  • HeroUI
  • Tailwind CSS
  • PWA

Backend

  • Node.js
  • Express
  • Bun
  • Elysia
  • JWT
  • BullMQ

Mobile & desktop

  • React Native
  • Expo
  • Capacitor
  • Electron
  • Jetpack Compose

Data & realtime

  • MongoDB
  • DynamoDB
  • Redis
  • WebSocket
  • Socket.IO
  • Algolia
  • TypeSense
  • Momento

Cloud & DevOps

  • AWS Lambda
  • EC2
  • S3
  • CloudFront
  • Cloudflare
  • Docker
  • GitHub Actions
  • GitLab CI

AI

  • OpenRouter
  • Fal.ai
  • Ollama
  • Transformers.js
  • Tool-calling agents

Writing

I write about what I have shipped.

AI character platforms, production infrastructure, and products running in India — not generic tutorials.

Amitesh Kumar

Full-stack. Product. Infrastructure.

Open to full-time product and platform roles.

I write about AI character platforms, production systems, and shipping grocery and social products.

Let’s talk Writing