Mosabbir Khan Shiblu, Developer in Montreal, QC, Canada
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Mosabbir Khan Shiblu

Verified Expert  in Engineering

Mobile App Developer

Montreal, QC, Canada
Toptal Member Since
June 18, 2020

Mosabbir has expertise in developing large-scale cross-platform mobile applications using Xamarin.Forms and software refactoring. With a focus on the MVVM pattern, he has successfully delivered projects ranging from healthcare MVPs to consumer-grade mobile apps. He also has experience in developing ETL applications in C# and T-SQL. With close to five years of industry experience and a research background in software refactoring, Mosabbir is adept at coding maintainable software.


Zibrio, Inc.
Xamarin, Xamarin.iOS, Xamarin.Android, Angular
Concordia University
TypeScript, JavaScript, Java
Enosis Solutions
ETL, XML Parsing, Cross-platform, Relational Databases, C#, Mobile Applications...




Preferred Environment

App Development, Cross-platform, XAML, Xamarin.iOS, Xamarin.Android, Xamarin.Forms, React, Node.js, MongoDB

The most amazing...

...project I've worked on is JsDiffer, which can detect refactorings from textually different JavaScript source code snippets.

Work Experience

Xamarin Developer

2021 - PRESENT
Zibrio, Inc.
  • Refactored the existing code and architecture to proper MVVM patterns.
  • Implemented a Bluetooth IOT device connection in real time.
  • Updated over-air IoT device firmware using Bluetooth from the app.
  • Completed the gradual migration of Xamarin.Forms to .NET MAUI.
  • Ensured the project remains HIPAA compliant throughout its lifecycle.
  • Introduced Agile methodologies and automated build using AppCenter. Here's the link to the app:
Technologies: Xamarin, Xamarin.iOS, Xamarin.Android, Angular

Graduate Research Assistant

2019 - 2022
Concordia University
  • Conducted state-of-the-art research on static source code analysis.
  • Researched code refactoring, re-engineering, and maintenance.
  • Developed a structured refactoring-based Diff viewer for JavaScript. This produces performed refactorings between two source codes.
Technologies: TypeScript, JavaScript, Java

Senior Software Engineer

2017 - 2019
Enosis Solutions
  • Created an internationalized cross-platform native application in Xamarin.Forms which is available in Android, iOS and Windows platform. Extensively worked with PDFTron SDK to accommodate a full-blown pdf editor inside the app.
  • Briefly worked on a Xamarin.Forms-based mobile app which is used for pickup dry cleanings. Made a beautiful Circular menu.
  • Built from scratch an automatic fuel pump payment mobile application in Xamarin.Forms. Used MVVM Cross to make the code highly maintainable; the user can pay for fuel via this app at a gas station.
  • Developed a POS system to be used at a gas station which involves complex socket programming with security for card payment.
  • Implemented mobile push notifications using OneSignal.
  • Integrated a real-time fuel server with a custom TCP protocol with a POS system to enable payments via credit/reward cards for gas stations across Canada. The unique feature is that the app supports multiple languages simultaneously.
Technologies: ETL, XML Parsing, Cross-platform, Relational Databases, C#, Mobile Applications, Mobile App Development, T-SQL (Transact-SQL), .NET, SQL, Windows Presentation Foundation (WPF), Xamarin, Xamarin.Forms

Software Engineer

2015 - 2017
Enosis Solutions
  • Designed and created 25+ custom ETL console apps using C# and T-SQL for importing large data warehouse files.
  • Created a custom CSV, XML, and Excel text parser in C# for large source files and bulk copying data into the SQL Server database.
  • Wrote SQL queries in T-SQL for various finance business logic such as monthly and quarterly rate of return calculations.
  • Implemented the functionality of a product sum aggregate in T-SQL using a logarithm.
  • Optimized the existing T-SQL queries which reduced the execution time by up to 40% for several data sets.
  • Handled proper encoding including ANSI and UTF-8 of the source files.
Technologies: XML Parsing, ETL, Relational Databases, C#, Microsoft SQL Server, SQL, T-SQL (Transact-SQL), .NET

Music Player
A Xamarin.Forms-based application. Most of the front end was done by me. My contribution in the back end was limited to this four-member project.

The media player was similar to the amazon music app however was different in many aspects. Due to the impact of COVID-19, the project was ultimately scrapped off just before publishing.

Due to the nature of the app, I had to create custom plugins from scratch most of the time. This includes a custom navbar, custom iOS wheel slider on Android. Unique curved slider and more.

Mobile Application for Fueling

I developed this white-label application for a Canadian client; it automates the process of pumping fuel from the gas station. Based on a current location, it detects gas stations where payment could be made using the app.

This Xamarin.Forms-based app is available on the iOS and Android platform

Mobile Application | Boardroom Portal (Aprio)

This large Xamarin Forms app runs on Windows, iOS, and Android platforms; it took eight months to build this app.

• Review and edit all board information in real time, while on the go.
• Make annotations for yourself, or for circulation to other members.
• Participate in discussions and polls/surveys.
• Easily view agendas while switching between meeting materials.
• View and edit schedules and calendars.
• Review meeting information and contacts.
• Work offline and maintain security.
• A single sign-on, you can use the same ID/password on both web and mobile apps to access information for all the organizations you’re involved in that use.
• A full-blown in-app PDF editor using PDF Tron SDK.
• MvvmCross was used to architect a highly maintainable design.


T-SQL (Transact-SQL), SQL, Java, C#, XAML, JavaScript, TypeScript, CSS, HTML


Refactoring, App Development, Cross-platform, ETL


Xamarin, Android, MvvmCross, Windows, Universal Windows Platform (UWP), Arduino


Xamarin.Forms, Query Optimization, Mobile App Development, Mobile Applications, Drones, Network Programming, Web Development, Big Data, Re-engineering, Project Development, Data Structures, Algorithms, Mobile Apps


Xamarin.Android, Xamarin.iOS, React, Node.js


Git, GitLab, Microsoft Visual Studio, Visual Studio, IDEA IDE, Babel


Relational Databases, XML Parsing, Microsoft SQL Server, MongoDB


.NET, Windows Presentation Foundation (WPF), .NET Core, Angular

2019 - 2022

Master of Science (MSc) Degree in Research in Software Engineering

Concordia University - Montreal, Canada

2011 - 2016

Bachelor of Science (BSc) Degree in Computer Science and Engineering

Ahsanullah University of Science and Technology - Dhaka, Bangladesh