Mobile Engineer · Android · Kotlin Multiplatform · Flutter

Hi, I'm Rajkumar Bhakta

Building production Android and cross-platform apps

Mobile engineer with 3 years building and maintaining production apps across native Android and cross-platform stacks — Kotlin, Jetpack Compose, Kotlin Multiplatform and Flutter. Five apps shipped on Google Play with 30K+ cumulative downloads, plus on-device AI features built on Google AI Edge SDK, LiteRT and ML Kit.

View Projects Contact Me

Welcome back

Rajkumar

Total projects

+3 this week

Design

Ship

Build progress

About

Passionate about creating intuitive mobile experiences

I work primarily in Kotlin and Jetpack Compose, with a lot of time spent in Kotlin Multiplatform and Flutter for cross-platform delivery. Most of what I build is offline-first and architecture-led — MVVM and Clean Architecture, modularised, dependency-injected — because that is what keeps an app maintainable once it is actually in the store. Lately I have been shipping on-device AI: OCR, segmentation, and local LLM inference that runs entirely without a network.

0Years experience

0+Apps on Play Store

0K+Downloads

0K+Active users

EducationB.Tech, Computer Science and EngineeringGMIT, Kolkata · 2020 – 2024 · CGPA 9.02

Skills

Technical arsenal

The languages, frameworks and tooling I reach for. Pick a category to bring it forward.

Kotlin

Dart

Java

Jetpack Compose

XML Views

Coroutines & Flow

Room

SQLite

WorkManager

ViewModel

Flutter

BLoC / Cubit

Provider

Compose Multiplatform

Kotlin Multiplatform

MVVM

Clean Architecture

SOLID

Modularization

Offline-First

Hilt / Dagger

Koin

Google AI Edge SDK

LiteRT

ML Kit

REST APIs

Retrofit

Ktor Client

Firebase

Supabase

JUnit

Mockito

Espresso

Compose UI tests

ProGuard / R8

Fastlane

GitHub Actions

Git & GitHub

Jira

Figma

Agile / Scrum

Play Console

Experience

Where I've built things

Jun 2026 — Present

Software Engineer

GeoTech Infoservices Private Limited · Kolkata, WB

Engineered a real-time match-tracking module with live ball positioning in Flutter, using Provider for state.
Built Firebase-driven dynamic localization for a sports fan engagement app (Flutter, Cubit).

FlutterProviderCubitFirebaseReal-time

Mar 2025 — Jun 2026

Software Developer

Sentientgeeks Consultancy and Services · Kolkata, WB

Built an offline-first employee tracking Android app from scratch in Kotlin and Jetpack Compose, with WorkManager background synchronization and real-time location tracking.
Delivered a food ordering and subscription app in Flutter with secure payment gateway integration.
Optimized a parcel delivery Android app (Kotlin, XML Views) and added interactive map integration.

KotlinJetpack ComposeWorkManagerOffline-FirstFlutter

Sep 2023 — Mar 2025

Junior Android Developer

Redoq Software Services Ltd. · Kolkata, WB

Improved canvas rendering performance by 90% in a Flutter/BLoC no-code website builder, by optimizing state management and eliminating redundant widget rebuilds.
Refactored a full-scale Point-of-Sale application covering billing, analytics and order management onto Clean Architecture, reducing coupling across legacy modules.
Developed a scalable white-label version of a UK-market food ordering app (Kotlin, XML Views).
Implemented automated CI/CD pipelines with Fastlane for Android and iOS releases.

FlutterBLoCClean ArchitectureKotlinFastlane

Selected work

Things I've shipped

Client work and personal apps, from Play Store releases to open-source packages.

Kuick - Order Food Online

Redoq Software Services Ltd.

Quick online food ordering app with real-time tracking and payment processing.

AndroidKotlinXMLRetrofit

Live

Kuick Shop CC

Redoq Software Services Ltd.

A POS application for restaurants and cafes to manage orders and billing.

FlutterHttpProviderGoogle Analytics

Live

Kuick Studio

Redoq Software Services Ltd.

A no-code application builder with drive and database management system.

FlutterHttpBlocGoogle Analytics

Live

Trutimer

Sentientgeeks Consultancy and Services

An efficient offline-first employee time tracking app.

AndroidKotlinJetpack ComposeRoom

FitLife

Sentientgeeks Consultancy and Services

A customized food delivery application focused on healthy meals.

FlutterDioRiverpodGoogle Analytics

Olinda

Freelancing

An online grocery ordering app with real-time tracking and payment processing.

AndroidKotlinJetpack ComposeRetrofit

Live

Canvas

One shared Kotlin Multiplatform codebase shipped to Android, iOS and Desktop. Offline storage, an undo/redo stack and 10+ customizable brush tools. 17K+ downloads and 4K+ monthly active users.

Kotlin MultiplatformCompose MultiplatformCoroutinesMultiplatform Settings

Live Code

TooAI

Offline AI utility: real-time OCR, barcode scanning and image segmentation via ML Kit, plus on-device LLM inference (Gemma, DeepSeek, Qwen) through the Google AI Edge SDK and LiteRT runtime. Includes a system-wide writing assistant that runs entirely on local models.

KotlinML KitGoogle AI Edge SDKLiteRT-LM

Live Code

Nested Menu Bar

A Flutter package for creating multi-level nested horizontal menu bars with ease.

Flutter

Live Code

G Dealz

Real-time game deals and freebies tracker with background notifications scheduled through WorkManager. 10K+ downloads, and featured in Play Store's "Top New Free Apps" across the US, Canada and Japan.

KotlinMVVMRetrofitWorkManager

Live Code