I will build a scalable android app with API integration

T
thesiamrayhan
T
thesiamrayhan
Rayhan
build a scalable android app with API integration
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build a scalable android app with API integration
Full Screen
build a scalable android app with API integrationbuild a scalable android app with API integration

About this gig

Build smart Android apps and IoT solutions.

Im Siam Rayhan, a professional Android Developer and IoT Engineer with 7+ years of experience. I create scalable native Android apps (Java/Kotlin) with secure API or Firebase integration and IoT communication using ESP32, NodeMCU, or Arduino.

What I offer:

  • Android App Development (Java/Kotlin)
  • Firebase / REST API Integration
  • IoT + MQTT / HTTP Connectivity
  • App UI Design, Icons & Splash Screens
  • AdMob / App Monetization
  • APK / AAB Submission to Play Store

Tech Stack: Android Studio, Firebase, MQTT, REST APIs, Java, Kotlin, Arduino, Figma

Clean, scalable code, full source code, fast delivery, and friendly support.

Lets bring your Android or IoT project to life. Contact me to get started.

  • App type

    • Native

  • Purpose

    • Delivery
    • Restaurant
    • Shopping
    • Taxi
    • Health & Fitness
    • Kids
    • IoT
    • Travel
    • Custom
    • E-commerce

  • Expertise

    • Data storage
    • Firebase
    • API integration

  • Programming language

    • Java

  • Frameworks

    • Android

  • Tools

    • Android Studio
    • Firebase

Get to know Rayhan

Rayhan

Certified Ethical Hacker and Fullstack Android Developer

  • FromBangladesh
  • Member sinceMay 2025
  • Avg. response time1 hour

  • Languages

    English, Hindi, Bengali
👋 I'm Siam Rayhan — Fullstack Android Developer & Certified Ethical Hacker from Bangladesh, coding since 2017. I build apps and secure them — a rare combo. ✅ Android App Development (Java/Kotlin) ✅ IoT Systems (ESP32, Arduino, Firebase) ✅ REST API Integration ✅ Custom Libraries on Maven Central & GitHub ✅ Penetration Testing & Security Audits ✅ Vulnerability Assessment & Ethical Hacking Open-source contributor. Let's build something powerful & secure!

My Portfolio

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