Володимир

Volodymyr Ivanov
Senior .NET MAUI / Xamarin Developer
[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | Khmelnytskyi, Ukraine

SUMMARY
Senior .NET MAUI / Xamarin Developer with 9+ years of experience building, migrating, and stabilizing cross-platform
mobile apps for iOS and Android. Focused on Xamarin.Forms, Xamarin.Native, .NET MAUI, .NET MAUI Hybrid, MAUI
Handlers/Renderers, MVVM, reusable controls, and platform-specific UI adaptation. Strong in Xamarin-to-.NET MAUI
migrations, offline-first architecture, SQLite/SQLCipher storage, synchronization, AppCenter diagnostics, and mobile
performance tuning. Experienced with scanner/barcode integrations, push notifications, REST APIs, SignalR, and enterprise
mobile workflows for logistics, healthcare, EHS, and field-service domains.

TECHNICAL SKILLS
Mobile & Cross-Platform: .NET MAUI, .NET MAUI Hybrid, Xamarin.Forms, Xamarin.Native, Android/iOS platform
APIs, MAUI Handlers & Renderers, MVVM, CommunityToolkit.MVVM
Migration & Architecture: Xamarin-to-.NET MAUI migration, shared cross-platform architecture, offline-first workflows,
lifecycle/threading stabilization, reusable controls
Data & Local Storage: SQLite, SQLCipher, SecureStorage, Preferences, offline caching, synchronization queues, conflict
handling
UI & Components: Syncfusion MAUI, MAUI Community Toolkit, responsive layouts, adaptive UI, accessibility-focused
mobile UI
Hardware & Integrations: Scandit Smart Data Capture, Motorola/Zebra Scanner SDKs, Camera APIs, Media Picker, REST
APIs, SignalR, push notifications
Delivery & Quality: Azure DevOps CI/CD, AppCenter crash diagnostics, xUnit, performance profiling, code reviews,
WCAG 2.1 mobile accessibility
Languages: English – Upper-Intermediate (B2), Ukrainian – Native

PROFESSIONAL EXPERIENCE
MIGRATION PROJECT – SENIOR .NET MAUI / XAMARIN DEVELOPER
MAY 2025 – PRESENT
Industry: Enterprise Mobile Application
Description: Migrated a high-complexity enterprise mobile application from Xamarin to .NET MAUI, modernizing
architecture, strengthening data protection, and improving performance, stability, and cross-platform UX for iOS and
Android.
• Led the migration of core authentication and UI modules from Xamarin to .NET MAUI, improving cross-
platform maintainability.
• Resolved major iOS/Android inconsistencies by adapting layouts, navigation flows, reusable components,
and platform-specific UI logic.
• Improved production stability by investigating crash patterns, lifecycle exceptions, DNS failures,
rendering issues, and async workflow issues using AppCenter diagnostics.
• Strengthened application security by implementing SQLCipher-based encrypted local storage and fixing
HTTPS/TLS certificate validation issues.
• Modernized performance-critical list screens by replacing legacy Xamarin list implementations with
responsive MAUI collection-based components.
• Restored reliable Motorola scanner support by stabilizing device-specific input handling and resolving

hardware integration issues.
• Increased persistence-layer reliability by adding transaction safety checks, improving error handling, and
reducing inconsistent local data states.
• Reduced lifecycle and threading instability by fixing race conditions, improving disposal behavior, and
making asynchronous operations safer.
Technologies: C#, .NET MAUI, Xamarin, SQLCipher, HTTPS/TLS, AppCenter Crash Diagnostics, Motorola Scanner
Integration

APP ACCESSIBILITY IMPROVEMENTS – SENIOR XAMARIN DEVELOPER
MARCH 2025 – SEPTEMBER 2025
Industry: Car Insurance
Description: Enhanced an insurance mobile application to meet WCAG 2.1 accessibility requirements, improving
navigation, assistive-technology compatibility, UX inclusivity, and cross-platform responsiveness.
• Conducted a full accessibility review of the existing Xamarin mobile application, identifying
navigation, screen reader, focus handling, and UI interaction issues affecting WCAG-aligned user
experience.
• Resolved accessibility barriers in key insurance app flows by redesigning Xamarin UI components with
clearer semantics, improved focus behavior, and better support for assistive technologies.
• Improved iOS and Android accessibility consistency by adapting platform-specific navigation patterns,
control behavior, and UI interactions for more predictable cross-platform usage.
• Partnered with UX/UI designers to embed accessibility requirements into layout structure, visual
hierarchy, and interaction patterns before implementation.
• Reduced accessibility regression risk by introducing automated accessibility checks and validating key
user flows that previously relied heavily on manual testing.
• Improved Xamarin application responsiveness by reducing UI blocking behavior, optimizing resource
usage, and refining performance-sensitive screens across mobile platforms.
• Stabilized mobile-to-backend communication by integrating RESTful APIs with secure authentication,
structured error handling, and resilient client-server communication flows.
• Improved release reliability by maintaining CI/CD pipelines for Xamarin builds, automated test
execution, and deployment preparation across iOS and Android.
Technologies: C#, Xamarin, .NET Framework, WCAG 2.1, ARIA, REST APIs, Git, Agile/Scrum

ASD MOBILE APPLICATION – SENIOR .NET MAUI / XAMARIN DEVELOPER
AUGUST 2024 – MARCH 2025
Industry: Logistics Mobile Application
Description: Rebuilt a logistics mobile platform on .NET MAUI, removing duplicated platform logic and introducing
reliable offline storage, faster synchronization, and optimized UI components for high-volume field operations.
• Migrated a logistics mobile application from Xamarin to .NET MAUI, consolidating duplicated
platform-specific UI, business, and navigation logic into a maintainable cross-platform architecture.
• Reduced architectural complexity by reorganizing the solution structure, introducing shared libraries,
and applying consistent implementation patterns across iOS and Android.
• Improved performance in data-heavy mobile workflows by implementing asynchronous data loading,
optimizing resource usage, and improving memory handling across field devices.
• Enabled reliable offline access by integrating SQLite-based local storage and caching mechanisms for
uninterrupted access to operational logistics data.

• Resolved offline synchronization issues by designing a queue-based sync mechanism with conflict
handling, controlled data reconciliation, and automatic synchronization after connectivity recovery.
• Prevented task data loss during interrupted mobile workflows by implementing retention logic for
completed and in-progress tasks in offline-first business scenarios.
• Modernized complex logistics screens with Syncfusion controls, improving navigation clarity, task
visibility, and interaction patterns for field users.
• Stabilized backend communication by refactoring REST API calls with asynchronous execution,
optimized serialization, resilient request handling, and centralized endpoint integration.
Technologies: C#, .NET MAUI, Xamarin, REST APIs, SQLite, Syncfusion

RED CROSS DELIVERS MOBILE APP – SENIOR .NET MAUI DEVELOPER
JANUARY 2024 – AUGUST 2024
Industry: Healthcare, Dispatch & Order Management
Description: Developed cross-platform dispatch and order-management features for Red Cross operations, combining
a .NET MAUI Hybrid app with web admin tools to improve routing accuracy, real-time tracking, and coordination.
• Implemented synchronized interaction between a .NET MAUI Hybrid mobile app and a Blazor-based
admin application, improving coordination between mobile field users and command centers.
• Improved dispatch and order-management accuracy by integrating geographic coordinates, Google
services, and location-based workflows into mobile and administrative application flows.
• Built cross-platform mobile functionality with .NET MAUI Hybrid, adapting shared application logic,
UI behavior, and operational workflows for consistent usage across iOS and Android.
• Resolved authentication and session-handling issues by reworking login flows, application lifecycle
behavior, and secure user access logic across the mobile application.
• Developed Blazor-based web interfaces for order tracking, dispatch coordination, and operational data
management, improving administrative workflow efficiency.
• Strengthened backend and data-layer reliability by implementing ASP.NET Core services, Dapper-
based MSSQL access, optimized queries, and reliable persistence logic.
• Enhanced admin-facing usability by integrating Telerik and Kendo UI components for richer
interaction, clearer data presentation, and responsive web behavior.
• Improved release and quality reliability by maintaining Azure DevOps CI/CD pipelines, creating
xUnit tests, and resolving defects across mobile, web, and backend flows critical to dispatch and
healthcare logistics operations.
Technologies: C#, .NET MAUI Hybrid, .NET Blazor, ASP.NET Core, MSSQL, Dapper, Telerik, Kendo UI, Azure DevOps,
xUnit

MOBILE QC TESTING POWER RED PRODUCTS – SENIOR .NET MAUI DEVELOPER
JULY 2022 – DECEMBER 2023
Industry: Manufacturing & Quality Control Automation
Description: Delivered a mobile quality-control platform enabling barcode-driven inspection, automated validation, and real-
time metrics for industrial products using enterprise-grade scanning and MAUI-based UI.
• Designed the architecture of a .NET MAUI mobile application for structured product inspection,
segmentation, and validation, replacing fragmented manual quality-control workflows.
• Built enterprise-grade mobile QC functionality by integrating the application into the ARC Mobile
ecosystem and aligning shared UI behavior with platform standards.
• Resolved barcode data-capture challenges by integrating Scandit Smart Data Capture and adapting

scanner workflows for accurate product identification during QC operations.
• Improved barcode processing reliability by implementing real-time filtering logic that validated scanned
input before it entered critical inspection workflows.
• Improved mobile responsiveness during QC testing by adding request caching mechanisms that reduced
repeated data retrieval and supported smoother inspection workflows.
• Ensured stable Android operation within the ARC Mobile ecosystem by addressing platform-specific
behavior, compatibility requirements, and mobile performance constraints.
Technologies: C#, .NET MAUI, REST APIs, Scandit Smart Data Capture, Azure DevOps

CLASS POSTING SERVICE LTP CHECK – SENIOR FULL-STACK DEVELOPER
JUNE 2022 – DECEMBER 2023
Industry: E-commerce Data Analytics & Price Monitoring
Description: Upgraded an e-commerce analytics platform for automated price aggregation and competitor monitoring,
supporting continuous data collection, high-speed processing, and real-time insight generation.
• Solved unreliable competitor data collection by building Selenium-based integrations in C#, enabling
structured extraction of pricing data from external e-commerce websites.
• Improved stability of automated data processing by implementing validation, retry logic, and error-
handling mechanisms across the parsing pipeline.
• Enabled accurate comparison between external market data and internal records by designing backend
workflows for pricing discrepancy detection.
• Eliminated fragmented access to pricing insights by developing interactive .NET Blazor dashboards
connected to ASP.NET Core backend services.
• Resolved performance issues in data-heavy application flows by optimizing SQL queries, indexes, and
backend data access patterns.
• Protected sensitive pricing and business data by securing API endpoints with token-based authentication
and controlled access mechanisms.
• Reduced manual business reporting effort by implementing Excel export functionality with custom
filtering and sorting for tailored data analysis.
Technologies: C#, ASP.NET Core, .NET Blazor, MSSQL, Dapper, Azure DevOps, Selenium

BIOMED BAGS & KITS ALLOCATION – SENIOR FULL-STACK DEVELOPER
DECEMBER 2022 – NOVEMBER 2023
Industry: Biomedical Logistics & Inventory Management
Description: Engineered allocation and inventory capabilities for a biomedical logistics system, improving supply tracking
accuracy and delivering a faster, more reliable web interface for operational workflows.
• Addressed fragmented communication between allocation, inventory, and user interface layers by
designing ASP.NET Core APIs for reliable integration across application components.
• Solved complexity in biomedical allocation workflows by structuring backend services around clear
business rules and maintainable application logic.
• Eliminated inconsistencies in operational screens by building interactive .NET Blazor components with
Telerik and Kendo UI.
• Improved usability of complex inventory and allocation processes by developing responsive interface
components for efficient data review and user interaction.

• Strengthened application stability by identifying and resolving defects across allocation, inventory, and
reporting workflows.
• Improved maintainability of critical business logic by implementing xUnit tests for backend services and
key application scenarios.
Technologies: C#, ASP.NET Core, .NET Blazor, Dapper, MSSQL, Telerik/Kendo UI, Azure DevOps, xUnit

SHELTER CLIENT INTAKE APP – SENIOR FULL-STACK DEVELOPER
DECEMBER 2022 – AUGUST 2023
Industry: Social Services & Case Management Systems
Description: Built a cloud-based intake and triage system for social-service shelters, digitizing assessments, medical checks,
supervision flows, and cross-department case visibility.
• Implemented authentication and authorization mechanisms with ASP.NET Core Identity to protect
sensitive client and medical intake data.
• Configured secure role-based access workflows for intake, triage, medical, supervision, and shelter
operations.
• Digitized complex multi-step case intake and assessment workflows using .NET Blazor and ASP.NET
Core.
• Structured backend services around clear business rules for client intake, assessment, and case-
management flows.
• Built interactive .NET Blazor components connected to ASP.NET Core backend services for operational
screens and user workflows.
• Improved usability in multi-step intake scenarios by introducing dynamic UI elements that guided users
through assessment and triage processes.
• Optimized aggregation queries and access patterns in Cosmos DB for high-volume shelter workflow data.
• Configured Azure DevOps pipelines for integration, testing, and deployment workflows.
Technologies: C#, .NET Blazor, ASP.NET Core, ASP.NET Core Identity, Cosmos DB, Azure DevOps, xUnit

AMERICAN RED CROSS MOBILE APP – SENIOR .NET MAUI DEVELOPER
OCTOBER 2022 – AUGUST 2023
Industry: Healthcare & Emergency Services
Description: Contributed to a mobile platform used for blood-supply transport tracking, improving real-time communication,
cross-platform behavior, and performance under load.
• Implemented push notifications in a .NET MAUI Hybrid mobile application to improve blood supply
transport communication and emergency logistics updates.
• Enabled real-time delivery status notifications and critical announcements for mobile users involved in
blood supply movement workflows.
• Integrated Blazor components into the .NET MAUI Hybrid experience to maintain consistent cross-
platform application behavior.
• Aligned shared Blazor UI components with mobile application flows, reducing fragmentation between
web-based and mobile functionality.
• Profiled mobile application behavior and optimized performance bottlenecks to improve responsiveness
during demanding operational usage.
Technologies: C#, .NET MAUI Hybrid, .NET Blazor, JavaScript, CSS, MSSQL, Dapper, xUnit, Azure DevOps

EMEX MOBILE APPLICATION – SENIOR .NET MAUI / XAMARIN DEVELOPER
DECEMBER 2021 – OCTOBER 2022
Industry: Environmental Health & Safety Management
Description: Modernized an enterprise EHS application by transitioning from Xamarin.Forms to .NET MAUI and enhancing
audits, incident reporting, multimedia capture, offline reliability, and multilingual support.
• Migrated mobile application screens and workflows from Xamarin.Forms to .NET MAUI, addressing
legacy cross-platform limitations.
• Refined shared UI structure, navigation patterns, and platform-specific behavior to improve
consistency across mobile platforms.
• Designed mobile screens for inspections, audits, incident reporting, and task management workflows
used by field teams.
• Enabled mobile EHS incident reporting with photo, video, and GPS data capture, replacing manual
documentation processes.
• Developed customizable inspection and audit workflows with checklist-based functionality for
compliance-driven field operations.
• Built synchronization flows that preserved data integrity across online and offline usage during
connectivity changes.
• Integrated calendar and notification features for operational reminders, alerts, and improved task
visibility.
Technologies: C#, .NET MAUI, Xamarin.Forms, EF Core, MSSQL, Azure DevOps, xUnit

SCOOZER – SENIOR XAMARIN DEVELOPER
JUNE 2020 – DECEMBER 2021
Industry: Urban Mobility & E-scooter Sharing
Description: Built an e-scooter sharing application with secure payments, precise geolocation, real-time ride tracking, and
smooth cross-platform performance for urban mobility users.

• Designed Xamarin.Forms screens for scooter discovery, unlocking, active ride tracking, and return
operations.

• Refined shared Xamarin.Forms UI components and navigation flows across iOS and Android.

• Integrated Stripe payment services with saved payment methods and transaction handling.

• Implemented geolocation features and interactive map-based access to nearby scooters.

• Enabled real-time scooter tracking with live availability and operational status updates.

• Developed push notifications for payment confirmations, battery warnings, and service-related alerts.
Technologies: C#, Xamarin.Forms, Stripe, Geolocation, Push Notifications, xUnit

360 BUSINESS – FULL-STACK DEVELOPER
DECEMBER 2019 – MAY 2020
Industry: Corporate Training & Assessment Systems
Description: Developed an enterprise assessment platform with secure identity flows, structured test authoring, high-
performance analytics, and modular APIs for large-scale evaluations.
• Implemented secure user registration and authentication with Identity Server, C#, and ASP.NET Core.

• Enforced identity-based access control and security policies for sensitive assessment and test
management data.
• Developed ASP.NET Web API endpoints for reliable data exchange, synchronization, and application-
layer integration.
• Applied modular API design principles to improve maintainability across backend services and
integration points.
• Implemented and optimized data access with Dapper, EF Core, and MSSQL.
Technologies: C#, ASP.NET Core, EF Core, Dapper, MSSQL, Identity Server

PEAKMVP MOBILE APP – XAMARIN DEVELOPER
MARCH 2019 – NOVEMBER 2019
Industry: Sports & Team Management
Description: Created a team-management application featuring real-time messaging, scheduling, collaboration tools, secure
onboarding, and a unified cross-platform UI for sports organizations.
• Developed cross-platform mobile features with C# and Xamarin.Forms for iOS and Android.
• Applied MVVM architecture across mobile screens, view models, and application workflows.
• Designed Xamarin.Forms screens for messaging, scheduling, and team coordination workflows.
• Created responsive layouts and reusable Xamarin.Forms controls to improve interface consistency
across devices.
• Integrated REST APIs for scheduling, team management, and user-related mobile data.
• Integrated SignalR for real-time in-app messaging.
• Introduced mobile caching mechanisms to improve responsiveness and data loading performance.
Technologies: C#, Xamarin.Forms, MVVM, REST APIs, SignalR

LENS DATA EXPLORER – WPF DEVELOPER
JANUARY 2018 – AUGUST 2019
Industry: Infrastructure & Asset Management
Description: Built a desktop tool for exploring large infrastructure asset datasets, supporting fast imports, detailed
visualization, and optimized SQL access to cable and pipeline records.
• Designed WPF interfaces for asset search, data exploration, and record review in a client-side .NET
application.
• Created reusable WPF controls for shared layouts, navigation, and consistent user interactions.
• Built ASP.NET Core backend services for data validation, preparation, and application workflow support.
• Combined Entity Framework Core, Dapper, and MS SQL Server for reliable and efficient data access.
• Optimized database queries, indexes, and retrieval patterns for data-heavy application workflows.
Technologies: WPF, ASP.NET Core, EF Core, Dapper, MSSQL, SignalR

EARLIER XAMARIN SOLUTIONS – XAMARIN DEVELOPER
AUGUST 2016 – DECEMBER 2017
Industry: Family Engagement, Agriculture & Intelligent Mobility
Description: Delivered several cross-platform Xamarin applications, including Parents & Kids, Tulsi, and Drive, with secure
onboarding, REST integrations, real-time messaging, cloud services, and data-rich mobile workflows.
• Built cross-platform mobile applications with C#, Xamarin.Forms, and MVVM architecture for iOS
and Android.

• Structured screens, view models, and business logic around reusable Xamarin.Forms patterns.
• Implemented registration, authorization, and onboarding flows for applications handling protected user
data.
• Developed responsive Xamarin.Forms interfaces for dashboards, management views, and user-
generated content.
• Integrated Azure Cognitive Services for image processing, photo-based lookup, and vehicle number-
plate detection.
Technologies: C#, Xamarin.Forms, ASP.NET Core, REST APIs, SignalR, Syncfusion, Azure Cognitive Services, MongoDB,
MSSQL, EF Core, Dapper, Azure DevOps

EDUCATION
KHMELNYTSKYI NATIONAL UNIVERSITY – COMPUTER SYSTEMS AND NETWORKS
SEPTEMBER 2000 – JUNE 2005