Ayesh Qumhieh, Developer in Ramallah, Palestine

Ayesh Qumhieh

Multithreading Developer

Ramallah, Palestine
Toptal Member Since
April 11, 2013

Ayesh is a self-motivated developer who loves challenges and problem-solving. He's always ready for tough assignments and enjoys learning new technologies and frameworks. Above all, Ayesh's goals are to continuously improve his development skills while achieving the best results for his clients.

Ayesh is available for hire
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Retrofit 2, Dagger 2, RxJava, Java, Kotlin, Android
Squid Tooth
Kotlin, Android, Android Architecture, Firebase, Automated Testing, Analytics...
ATN Channel 7
Kotlin, Android TV, Android


Ramallah, Palestine



Preferred Environment

Kotlin, Java, Android

The most amazing...

...thing I've ever done is designing a very robust low-level API to deal with the transport layer in the implementation of a peer-to-peer application.

Work Experience

2017 - PRESENT

Senior Android Engineer

  • Introduced major architecture and codebase refactoring across multiple Android apps, improving code quality, scalability, and performance.
  • Designed very complex UI widgets required for very specific and detailed features which are not available as open source.
  • Oversaw team building and trained on skills and knowledge sharing, highly improving the quality of the Android engineering team.
Technologies: Retrofit 2, Dagger 2, RxJava, Java, Kotlin, Android
2022 - 2023

Android Developer

Squid Tooth
  • Performed major codebase refactoring to implement the latest Android Jetpack components.
  • Implemented dependency injection using Hilt, improved unit and UI tests, and enhanced the app's performance.
  • Fixed many bugs and memory leaks that the client did not notice.
  • Conducted numerous Firebase experiments to improve user retention.
Technologies: Kotlin, Android, Android Architecture, Firebase, Automated Testing, Analytics, Reporting, A/B Testing
2021 - 2022

Senior Android Engineer

ATN Channel 7
  • Handled difficult bugs impacting navigation and user experience.
  • Created various customized UI components, including different banners for the Android TV app.
  • Worked on both unit and UI tests, as well as performance optimization.
Technologies: Kotlin, Android TV, Android
2021 - 2021

Expert Android Developer

Nouvel Angle
  • Did complete code refactoring for an Android app using legacy Android Java. Also used Kotlin with the latest recommended Android Jetpack and architecture components. Here's the link: play.google.com/store/apps/details?id=com.souffleurderevesapp.app.
  • Helped identify and fix back-end and API bugs and recommended future code improvements.
  • Implemented the app's audio streaming player using ExoPlayer.
Technologies: Java, Android, Kotlin
2020 - 2021

Android Developer

Kit Enterprises
  • Improved and debugged a point-of-sale Android application that works on an Android-based smart POS machine made by PAX Technology.
  • Created a JavaScript bridge to communicate between HTML and JavaScript-based screens with app core functionality.
  • Customized a secondary screen layout for showing the customer's cart and bill.
Technologies: Java, Android, Kotlin
2020 - 2020

Android Developer

Visual ID
  • Implemented a "companion" Android application installed on custom Android TV devices.
  • Worked on the application, which manages and reports custom devices by collecting analytics and performance metrics and remotely runs super-user commands: updating, downgrading, uninstalling, and installing other apps.
  • Created the complete documentation of the app's architecture, as well as provided references and recommendations for future app development and improvement.
Technologies: Android, Node.js, REST APIs, Kotlin
2015 - 2017

Senior Android Engineer

Microsoft ILDC
  • Developed in native Android, JUnit, and UI testing, working closely with product and design when planning for new features.
  • Tracked and fixed bugs using Microsoft's TFS as a reporting tool.
  • Helped improving application performance and memory management drastically by redesigning cache architecture.
Technologies: Android
2010 - 2015

Software Engineer

InfiniteTiers, Inc.
  • Designed, implemented, and marketed a location-aware Android application that facilitates the process of of car accident insurance investigations.
  • Implemented HTTP multipart/form data for files uploaded from Android phones (images captured by phone camera), with Servlets for back-end development.
  • Collaborated with development team members for a peer-to-peer chat application for Android which supported instant-messaging, group chat, peer-to-peer multi-files transfer, and audio calls.
  • Built a complete end-to-end API for transfering files peer-to-peer over the web for Android, including both the client-and server-side components.
  • Built and configured mutiple C/C++ APIs for the Android platform with Android NDK, CMake, and GNU-Make, which made use of JRTPLIB, EMIPLIB, and speex audio codecs.
  • Handled remote installation and configuration of Asterisk VOiP server on CentOS linux.
Technologies: C++, C, Android NDK, Android, Servlet, Jakarta Server Pages (JSP), Java SE
2010 - 2010

Software Engineer

InfiniteTiers, Inc.
  • Worked as a member of a web development team in the creation of a purchase order management system.
  • Researched performance optimization solutions for our, project which included client-side Ajax modifications and heavy transaction modifications in a SQL database.
  • Contributed to the development of a POS product using Microsoft Windows Forms applications in C#.
  • Created ASP.NET reporting tools for the POS product.
Technologies: C#, VB.NET, ASP.NET


Purchase Order Management System

A purchase order management system in the USA with over 200 locations across the country.

Mobile Insurance Claims Processing System

Used to help insurance investigators document and submit automobile accident claims from accident locations right to the insurance company servers. Speeds up the insurance claim process by allowing for very fast and accurate data acquisition, including all required details about the insurance claimers, accident images, and exact location using GPS system and Google Maps (for Android and for web) all done through any kind of internet connection (3G, 2G, wifi).

I was involved in almost every part of the application development lifecycle, including system analysis, application development for Android, and JSPs and Java-Servlets for back-end development, testing, and quality assurance.


Peer-to-peer chat application with support for group chat, location sharing, real-time files transfer, and audio calls through the web.

Aywa | Video on Demand

A video-on-demand streaming application for movies and TV shows targeting the Middle East and Arab audiences.

I worked on the core architecture and wireframe design for all screen sizes (phones, tablets, and Android TVs). I also implemented adaptive video streaming for movies and a list of TV show episodes using ExoPlayer.

Microsoft Power BI

Microsoft Power BI for Android.


I was an Android engineer working simultaneously on five Android apps.

Harri mobile applications helps clients in the hospitality industry in different areas, from jobs searching, recruiting, and interview scheduling as well as phone screening, onboarding, and team management to schedules, shifts, breaks, clock-ins and outs, vacations, and much more.

My job on a daily basis includes design, architecture, new feature implementation, and code review.



Java, C#, JavaScript, Kotlin, VB.NET, Java SE, C, C++


Google Gson, jQuery, jQuery UI, RxJava, Google Maps, Java Servlets, Retrofit 2, Node.js, REST APIs


Eclipse IDE, Android NDK, Java Concurrency, GNUMake, Servlet, Adobe Photoshop, Apache, Android Studio, ExoPlayer, Microsoft Power BI


Object-oriented Programming (OOP), Design Patterns, Model View Viewmodel (MVVM), B2B, Agile Software Development, Automated Testing


Android, Firebase, Android TV


POS, Multithreading, Code Architecture, Android Architecture, Analytics, Reporting, A/B Testing


ASP.NET MVC, ASP.NET Web API, JNI, Dagger 2, ASP.NET, Jakarta Server Pages (JSP), Rx


SQL Server 2008, MySQL


2004 - 2009

Bachelor's (B.Sc.) Degree in Computer Science

An-Najah National University - Nablus, West Bank Palestine