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Senior Mobile Engineer ยท Android & Flutter

Hello, I'm

Biju Mondal

Building scalable, high-performance mobile experiences with Kotlin, Android, Flutter, and modern mobile technologies.

Seven-plus years shipping production apps โ€” architecture, performance, and the product details that hold up after launch.

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7+

Years

20+

Projects

100K+

Users

Kotlin
Compose
Flutter
Firebase
Biju Mondal, Senior Mobile Engineer

ABOUT

Senior Mobile Engineer

Seven-plus years building Android and Flutter applications used in production โ€” from architecture and APIs to the last pixel of the client.

I work as a Senior Mobile Engineer on Android and Flutter products. Most of my time is spent on Kotlin, Dart, Jetpack Compose, and the architecture that keeps a codebase shippable: MVVM, MVI, Clean Architecture, and the unglamorous work of performance, offline behavior, and crash-free sessions.

The apps I have shipped sit in live products โ€” mobility, logistics, food delivery, healthcare, and fintech โ€” not throwaway demos. That usually means maps, payments, notifications, real-time updates, and APIs that have to stay honest under load.

I care about product-shaped engineering: clear ownership, reviews that catch the real bugs, and mobile clients that still feel fast a year after launch.

Android & Flutter

Kotlin, Jetpack Compose, Dart, and production mobile architecture across native and cross-platform apps.

Product engineering

Ride-hailing, logistics, food delivery, healthcare, and fintech โ€” shipping the workflows users actually depend on.

Performance & scale

Clean Architecture, MVVM/MVI, startup and memory work, and code that still holds up after the first release.

EXPERIENCE

Professional Journey

Over 7+ years of building scalable Android and Flutter applications across healthcare, logistics, education, fintech and enterprise solutions.

Senior Android Engineer

Biztoso

Jun 2025 โ€“ Apr 2026

Bangalore, India

  • Led Android architecture and feature development.
  • Built scalable applications using Clean Architecture.
  • Integrated Firebase, Maps and Payment Gateway.
  • Reduced app startup time and memory usage.
  • Mentored Android developers and reviewed PRs.
KotlinJetpack ComposeFirebaseMVVMClean ArchitectureCI/CD

Senior Mobile Engineer

Innofied Solutions

Jul 2023 โ€“ Feb 2025

Kolkata, West Bengal, India

  • Developed enterprise Flutter applications.
  • Built reusable widgets and design systems.
  • Implemented push notifications and payments.
  • Collaborated with cross-functional teams.
FlutterBlocFirebaseREST APIDart

Senior Android Developer

CBNITS

Feb 2022 โ€“ Apr 2023

Kolkata, West Bengal, India

  • Migrated Java projects to Kotlin.
  • Implemented offline-first architecture.
  • Improved crash-free sessions.
KotlinJavaXMLRetrofitRoom

Android Developer

Gozo Cabs

Aug 2019 โ€“ Feb 2022

Kolkata, West Bengal, India

  • Developed cab booking features.
  • Integrated real-time location tracking.
  • Optimized Google Maps performance.
  • Implemented ride booking workflows.
JavaKotlinGoogle MapsLocationFirebase

PROJECTS

Selected work

Production mobile products across mobility, logistics, food delivery, fintech, healthcare, and communication.

Mobility

Gozo Cabs

Ride-hailing / mobility platform

Production ride-hailing work covering booking, maps, and live location for rider and driver workflows.

Rider and driver workflowsRide bookingReal-time location trackingGoogle Maps integration
JavaKotlinAndroid SDKGoogle MapsLocation
View details
Mobility

AllRide

Customer, driver, and partner ecosystem

Multi-app mobility ecosystem covering customer, driver, and partner flows with maps, APIs, and real-time updates.

Customer, driver, and partner appsReal-time trip workflowsMaps and locationAPI integration
KotlinAndroid SDKREST APIsGoogle MapsFirebase
View details
Food delivery

Grovo

Food delivery platform

End-to-end food delivery platform: customer, restaurant, and delivery apps, plus admin, APIs, payments, and live order tracking.

Customer applicationRestaurant partner applicationDelivery partner applicationAdmin dashboard
FlutterDartKotlinNode.jsREST APIs
View details
Logistics

Platform Delivery UK

Parcel / delivery application

Logistics app for parcel delivery workflows, tracking, and API-backed operations on Android.

Delivery job workflowsParcel trackingMaps and locationAPI integration
KotlinJetpack ComposeFirebaseGoogle MapsRoom
View details
Commerce

Recycle for Cash

Recycling / commerce application

Marketplace connecting users with recycling vendors through location-based pickup, wallet, and payments.

Location-based vendor discoveryPickup schedulingWalletPayments
FlutterDartFirebaseGoogle Maps
View details
Fintech

Niyo Global / Neo Global

Credit-card / fintech platform

Mobile work on a credit-card and financial technology platform, with attention to secure product flows.

Credit-card product flowsAccount-facing mobile UIAPI integrationProduction fintech constraints
KotlinAndroid SDKREST APIsFirebase
View details
Communication

CPSCOM

Chat / communication application

Chat and messaging product work covering conversations, delivery of messages, and mobile communication flows.

ConversationsMessagingReal-time updatesMobile communication UI
FlutterDartFirebaseREST APIs
View details
Healthcare

TruMedic

Healthcare consultation

Telemedicine application supporting video consultation, appointments, prescriptions, and authenticated sessions.

Video callingAppointmentsNotificationsSecure login
FlutterDartFirebaseDioBLoC
View details

SKILLS

Technical toolkit

Grouped by how I actually use them: native Android, Flutter, the APIs those clients talk to, and the tools around the work.

Android

Native Android, architecture, and Jetpack.

  • Kotlin
  • Java
  • Android SDK
  • Jetpack Compose
  • XML
  • MVVM
  • MVI
  • Clean Architecture
  • SOLID
  • Coroutines
  • Flow
  • LiveData
  • Paging
  • WorkManager
  • Hilt
  • Dagger
  • Room
  • DataStore
  • Retrofit
  • GraphQL
  • Firebase
  • Crashlytics
  • Media3
  • CameraX
  • Maps
  • BLE

Flutter

Cross-platform apps with Dart and Firebase.

  • Dart
  • Flutter
  • BLoC
  • Provider
  • GetX
  • Dio
  • Firebase
  • REST APIs
  • Push Notifications
  • Maps
  • Location

Backend / Integration

APIs, realtime, and payments that mobile clients depend on.

  • REST APIs
  • Node.js
  • Express
  • PostgreSQL
  • Prisma
  • Socket.IO
  • Firebase
  • Razorpay
  • Payment integrations

Tools

Day-to-day engineering and collaboration.

  • Git
  • GitHub
  • Android Studio
  • VS Code
  • Cursor
  • Postman
  • Figma

CONTACT

Let's talk

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