Summary
Overview
Work History
Education
Skills
Timeline
AdministrativeAssistant
Illia Andrieiev

Illia Andrieiev

Senior Xamarin/MAUI Developer
Bucharest

Summary

Highly skilled Xamarin/MAUI developer with over 5 years of experience designing, developing, and delivering cross-platform mobile applications that combine performance, usability, and maintainability. Proven track record in leading teams of junior developers, mentoring colleagues, and coordinating complex projects from concept to deployment. Adept at creating scalable application architectures, integrating RESTful APIs, and leveraging SQLite to build robust, data-driven solutions. Recognized for problem-solving abilities, attention to detail, and ability to translate business requirements into efficient, user-friendly mobile experiences. Experienced in collaborating with cross-functional teams to ensure timely delivery and continuous improvement of high-quality mobile products.

Overview

5
5
years of professional experience
4
4
Languages

Work History

Senior MAUI Developer

GlobalLogic
07.2024 - 09.2025
  • Developed and maintained cross-platform mobile applications using Xamarin.Forms and .NET MAUI for a globally recognized elevator company.
  • Implemented secure user authorization flow using OAuth, improving access control and data protection.
  • Integrated AirWatch MDM support and BLE/TCP connectivity for device communication and remote configuration.
  • Optimized post-migration performance and UI responsiveness following transition from Xamarin.Forms to .NET MAUI.
  • Prepared the application for public distribution, ensuring compliance with store guidelines and internal quality standards.
  • Collaborated with cross-functional teams to deliver stable, user-centric features under NDA constraints.

Senior Xamarin.Forms | MAUI Developer

N-iX
02.2023 - 04.2024
  • Developed and maintained the mobile version of a large-scale unmanned aviation supervision service using Xamarin.Forms and .NET MAUI.
  • Migrated core application components from Xamarin to .NET MAUI, enhancing performance, maintainability, and platform consistency.
  • Collaborated directly with Microsoft experts to adapt and optimize application architecture for MAUI.
  • Implemented a user feedback system that improved app store ratings and engagement.
  • Utilized Refit and Polly to strengthen API communication and error handling for higher reliability.
  • Integrated MapBox for advanced geospatial visualization and FCM for real-time notifications.
  • Led team demos and knowledge-sharing sessions to ensure smooth feature delivery and code quality improvements.

Senior Xamarin Developer

Glorium Technologies (Outstaff)
01.2022 - 02.2023
  • Developed and maintained the mobile version of a large-scale U.S. healthcare project in compliance with HIPAA regulations.
  • Designed and implemented new features from scratch using Xamarin.Android and Xamarin.iOS, presenting results directly to the client.
  • Improved application performance and responsiveness through code optimization and issue resolution.
  • Enhanced reliability and maintainability by refactoring legacy code and applying best practices with MvvmCross and Polly.
  • Collaborated closely with the client’s support team to analyze user feedback and address production issues efficiently.
  • Utilized Realm for secure and efficient offline data storage tailored to healthcare data requirements.

Senior Xamarin.Forms Developer

Vakoms (Outstaff)
01.2022 - 05.2022
  • Developed and maintained the mobile version of a U.S.-based financial crypto platform using Xamarin.Forms.
  • Participated in architecture design, contributing to scalable and secure application structure.
  • Designed and implemented new features from scratch in close collaboration with the client.
  • Worked effectively under high-tempo conditions and tight delivery deadlines to meet business objectives.
  • Collaborated with an international development team based in the UAE to ensure seamless integration and delivery.
  • Utilized Refit, Polly, Prism, and SQLite to enhance code reliability, maintainability, and offline functionality.
  • Integrated ChartIQ for advanced financial charting and FCM for real-time user notifications.

Mobile Application Developer

HeadWorks
12.2020 - 02.2023

Various Mobile Applications — Food Delivery, Multimedia, and IoT Security
Xamarin.Forms, Swift, REST, Prism, SQLite, AWS, Firebase Analytics, ReactiveUI, BLE, CoreData, Swinject

  • Designed and developed cross-platform mobile applications across multiple domains, including food delivery, multimedia recording, and smart safe management.
  • Led a team of junior developers on the food delivery project, providing technical guidance, code reviews, and task coordination to ensure timely and high-quality delivery.
  • Contributed to architecture design to improve scalability, maintainability, and performance across projects.
  • Created new features from scratch and optimized existing ones for better speed, responsiveness, and stability.
  • Enhanced code reliability through refactoring, improved exception handling, and adherence to best practices.
  • Collaborated closely with client-side teams to align implementation with business and design requirements.
  • Worked with technologies such as BLE communication, reactive MVVM frameworks, and cloud services (AWS, Firebase Analytics) to deliver robust, user-centric mobile experiences.

Education

Bachelor of Computer Engineering - Physics, Electronics And Computer Systems

National University Named After Oles Honchar
Dnipro, Ukraine
06-2020

Master of Computer Engineering - Physics, Electronics And Computer Systems

National University Named After Oles Honchar
Dnipro, Ukraine
04.2001 -

Skills

XamarinForms

undefined

Timeline

Senior MAUI Developer

GlobalLogic
07.2024 - 09.2025

Senior Xamarin.Forms | MAUI Developer

N-iX
02.2023 - 04.2024

Senior Xamarin Developer

Glorium Technologies (Outstaff)
01.2022 - 02.2023

Senior Xamarin.Forms Developer

Vakoms (Outstaff)
01.2022 - 05.2022

Mobile Application Developer

HeadWorks
12.2020 - 02.2023

Master of Computer Engineering - Physics, Electronics And Computer Systems

National University Named After Oles Honchar
04.2001 -

Bachelor of Computer Engineering - Physics, Electronics And Computer Systems

National University Named After Oles Honchar
Illia AndrieievSenior Xamarin/MAUI Developer