APP & WEB DEVELOPER

Hi, I'm Dev Raihan

I build practical Flutter, Android and web applications and share development lessons through real project case studies, tutorials and technical guides.

Explore Projects Developer Blog

DEVELOPMENT

What I Build

Mobile applications, business tools, web utilities and API-backed systems.

📱

Mobile Development

Flutter, Dart, Java and Android applications designed for real workflows and practical users.

Flutter Dart Java Android

⚙️

Backend Development

PHP and MySQL REST APIs that support authentication, business logic and mobile application data.

PHP MySQL REST API

🔥

Firebase & Cloud

Authentication, Firebase integration and cloud-backed features for modern applications.

Firebase Google Sign-In

PORTFOLIO

Project Case Studies

Selected applications with detailed project pages, features, screenshots and development notes.

PROJECT 01

LED Banner Pro

A customizable LED-style message display for fullscreen announcements, shops, events and digital signage.

Java Android Bluetooth

View Case Study Google Play

PROJECT 02

My Dairy

Salary, overtime, attendance and personal finance manager built around real employee workflows.

Flutter PHP MySQL

View Case Study

PROJECT 03

MultiPower - Multi WebView

A Flutter multi-WebView utility for opening and managing multiple web pages from one Android application.

Flutter WebView AdMob

View Case Study Google Play

PROJECT 04

Staff Management System

A workforce management platform for attendance, payroll, overtime, salary, leave, departments and reports.

Flutter PHP MySQL

View Case Study

DEVELOPER BLOG

Practical Developer Guides

Tutorials based on Flutter, Android, PHP, Firebase, AdMob and Google Play workflows.

ADMOB

How to Add Google AdMob in Flutter

Build banner, interstitial, rewarded and app-open advertising flows correctly.

Read Article →

GOOGLE PLAY

Publish a Flutter App to Google Play

Prepare signing, AAB builds, testing and Play Console release configuration.

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BACKEND

Flutter PHP MySQL Login System

Build a safer authentication flow between Flutter and a PHP/MySQL backend.

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FIREBASE

Flutter Firebase Authentication Guide

Configure Firebase authentication and secure app profile data.

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ANDROID

How to Fix Flutter Gradle Errors

Diagnose AGP, Gradle, Kotlin, Java and plugin compatibility problems.

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PHP API

Create a REST API with PHP and MySQL

Build predictable JSON endpoints for Flutter and Android apps.

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AUTHENTICATION

Flutter Google Sign-In Setup & Release Fix

Fix Google Sign-In problems that appear only in release or Play Store builds.

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FIREBASE

Firebase SHA-1 & SHA-256 Setup

Understand debug, upload and Play App Signing certificate fingerprints.

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ADMOB

Flutter AdMob Server-Controlled Ads

Manage ad configuration remotely using a backend JSON configuration.

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WEBVIEW

Flutter WebView Complete Guide

Handle URLs, navigation, history, loading and WebView security.

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EXPORT

Flutter PDF & Excel Export Guide

Create reliable reporting and export features in Flutter apps.

Read Article →

SECURITY

Secure PHP MySQL APIs

Use prepared statements, validation and authorization correctly.

Read Article →

RELEASE

Flutter AAB Build & App Signing Guide

Understand upload keys, Play App Signing and release testing.

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GOOGLE PLAY

Google Play Data Safety Guide

Audit app and SDK data collection before completing Data Safety declarations.

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REST API

Flutter REST API Integration Guide

Structure endpoints, services, models and clear error handling.

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TROUBLESHOOTING

Common Flutter Release Problems

Troubleshoot authentication, APIs, ads and Android release failures.

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LET'S BUILD SOMETHING

Need an App or Website?

For application development, website projects or technical collaboration, contact me.

Contact Me