The full shelf

ALL WORK(26)

Embedded systems first, then Android apps, web and backend. Filter by what you're here to build.

26 projectsEmbedded firstEvery project has a case study

// Main work

Embedded & On-device (8)

STM32 programming over USB, industrial HMI firmware, ESP8266 devices and native C/C++ running on Android phones.

on Google Play// 01

Embedded & On-device

Nyas

An Android app on Google Play that programs STM32 chips through an ST-Link over USB. No PC, no network.

Kotlin · Jetpack Compose · Android NDK / JNI · C / C++ +6Case study →

Deployed in production// 02

Embedded & On-device

Diamond Machine HMI

Industrial touchscreen control for a diamond-cutting machine — STM32 + DWIN HMI over a custom UART protocol.

STM32 HAL · C · DWIN HMI · UART +1Case study →

Unreleased// 03

Murmur

Embedded & On-device

Murmur

Offline speech to text on Android: a C++17 core over whisper.cpp, 3.6 to 6.1 times real time on a phone.

Kotlin · Jetpack Compose · C++17 · whisper.cpp +5Case study →

Working prototype · personal use// 04

Life System Desk Device

Embedded & On-device

Life System Desk Device

An ESP8266 desk device that logs my task events to a FastAPI service over MQTT, and holds on to them when the network drops.

ESP8266 (NodeMCU) · C++ · PlatformIO · MQTT +6Case study →

Unreleased// 05

Magic Widget

Embedded & On-device

Magic Widget

Android home-screen widgets that are MicroPython scripts, run in a sandbox embedded through the NDK.

Kotlin · Jetpack Compose · C (NDK, clang) · MicroPython +5Case study →

Published · investable prototype// 06

Embedded & On-device

PicoAndroid IDE

A full MicroPython IDE for Raspberry Pi Pico that runs on your phone — code, flash and debug over USB-OTG.

Kotlin 2.0 · Jetpack Compose · USB-serial · MicroPython +1Case study →

Prototype ready// 07

Embedded & On-device

Motor Health Monitor

Predictive maintenance for industrial motors — vibration analysis on-device, BLE to Android, OTA updatable.

STM32 · ESP32 · FreeRTOS · ADC + DMA @ 4 kHz +4Case study →

Scalable architecture proven// 08

Embedded & On-device

ESP32 Serial-to-TCP Gateway

Legacy industrial equipment, meet the network — UART/RS485 bridged to TCP/IP with a scalable C++ architecture.

ESP32 · C++ · TCP/IP · UART / RS485 +1Case study →

// Also

Android & Mobile Apps (6)

Android apps on Google Play, in Flutter, Kotlin and React Native.

on Google Play// 09

Stairs calculator with live stringer diagram

Android & Mobile Apps

SiteCalc

Ten offline construction calculators that draw a to-scale diagram as you type. On Google Play as Stair & Rafter Calculator.

Flutter · Material 3 · Provider · CustomPainter +2Case study →

on Google Play// 10

Employee app: live trip with pickup code and map

Android & Mobile Apps

EzeFare Driver & Employee

One React Native codebase, two Android apps on Google Play: live trips for drivers and the employees they pick up.

React Native · Expo SDK 54 · TypeScript · Expo Router +4Case study →

on Google Play// 11

Android & Mobile Apps

GeoStamp

GPS timestamp camera for field teams on Google Play: stamped photos, project logs and one-tap PDF site reports.

Flutter · camera + geolocator · OpenStreetMap (flutter_map) · sqflite +4Case study →

on Play Store · 4.7★// 12

Android & Mobile Apps

Dasho

All-in-one delivery & marketplace super-app — customer, merchant and driver flows in one Flutter platform.

Flutter · BLoC · Kotlin (Zoho Payments bridge) · Socket.IO +6Case study →

on Play Store// 13

Android & Mobile Apps

PassMan

A password manager and encrypted-notes vault for Android, with a native Kotlin autofill service.

Flutter · BLoC · Kotlin (Autofill Service) · AES-256 +3Case study →

On GitHub// 14

Composer

Android & Mobile Apps

Composer

A modern notes app in Jetpack Compose — MVVM, Room and Hilt done cleanly. Open source.

Kotlin · Jetpack Compose · MVVM · Room +1Case study →

// Also

Mobile Games (3)

Games on Google Play, from a three.js city builder to fidget spinners.

on Google Play// 15

Mobile Games

Sky City

A cozy 3D merge puzzle built with React Native and three.js, live on Google Play.

React Native · Expo · TypeScript · three.js (react-three-fiber) +4Case study →

on Play Store// 16

Mobile Games

Spindle

Fidget-spinner game with a Play-Store referral reward system — Flutter front, Node.js economy behind.

Flutter · BLoC · Node.js · PostgreSQL +2Case study →

on Google Play// 17

Fidget Spinner

Mobile Games

Fidget Spinner

A small Flutter spinner game on the Flame engine, live on Google Play.

Flutter · Dart · Flame engineCase study →

// Also

Web (6)

Stores, tool platforms and web apps, mostly Next.js and TypeScript.

polestark.com// 18

Web

Polestark

My own D2C store, built solo: a Next.js shop with an AI shopping assistant grounded in the live catalog.

Next.js 16 · React 19 · Prisma + PostgreSQL · NextAuth +5Case study →

Deployed · toolsamurai.com// 19

Web

ToolSamurai

An engineering-tools platform: 25 hardware & firmware calculators, a paid API, and an embeddable widget system.

Next.js 15 · React 19 · TypeScript · Prisma + PostgreSQL +4Case study →

Working v0.4// 20

Web

LeadStudio

An agency CRM that finds local businesses on the map, AI-scores them, and hosts the pitch site it generates.

Next.js 16 · Prisma 7 · PostgreSQL · Google Places API +4Case study →

Working prototype// 21

Web

GcodeAnim Studio

Drop in a G-code file, get a cinematic 3D animation of your print building layer by layer — exported to MP4.

React 19 · TypeScript · Three.js · Web Workers +3Case study →

Running in production (private)// 22

Web

HQ

A self-hosted agentic life manager — installable PWA with push, live sync and a cron scheduler that works while you don't.

Node.js · Express · TypeScript · SQLite (WAL) +5Case study →

chaitanyadoors.com// 23

Web

Chaitanya Doors

Catalog website + admin CMS for a door manufacturer — one of my first client deliveries, still live.

Next.js · React · Prisma + PostgreSQL · Server Actions +2Case study →

// Also

Backend & AI (3)

APIs, realtime systems, payments and AI features behind the apps.

Delivered · 2 apps live on Google Play// 24

Backend & AI

EzeFare

Employee-transport platform for companies, vendors and drivers: a 273-route NestJS API, a 91-page web app and two Android apps.

NestJS · TypeScript · PostgreSQL · Prisma +8Case study →

Benchmarked · v2.0// 25

Backend & AI

PulseFleet

Self-hostable industrial IoT platform — MQTT fleets, TimescaleDB telemetry, rules, alarms and OTA at 2,000 msg/s.

EMQX (MQTT) · TimescaleDB · Redis Streams · Fastify +6Case study →

Served the Play Store app// 26

Delivery Marketplace API

Backend & AI

Delivery Marketplace API

The backend of a three-sided delivery marketplace (customers, sellers and delivery partners): Express, PostgreSQL and Socket.IO.

TypeScript · Node.js · Express · PostgreSQL +8Case study →