Mobile Application Developer II (.NET MAUI)

Job Summary The Mobile Application Developer III (.NET MAUI) is responsible for developing, maintaining, and enhancing the Company’s Virtual OneStop (VOS) mobile applications using .NET MAUI and C#. This role works closely with cross-functional team members in an Agile environment to deliver new features, resolve defects, support production issues, and ensure successful deployment of mobile applications to Apple App Store and Google Play. The developer will contribute to both cross-platform MAUI code and platform-specific native implementations (iOS/Android) when required. The role supports a single shared codebase deployed across multiple clients, with client-specific configuration, branding, and assets applied to meet individual customer requirements.

Viable candidates must be willing to work onsite at GSI's headquarters in Palm Harbor, Florida daily. Key Responsibilities

Develop and maintain mobile applications using .NET MAUI and C#

Develop and support a single shared MAUI codebase with client-specific configuration and assets for multiple client deployments

Implement cross-platform UI and business logic using MAUI best practices

Develop platform-specific native MAUI code for iOS and Android as needed

Deploy mobile applications to Android and iOS devices for development and testing purposes, including emulator and physical device deployment

Publish and maintain mobile applications using Visual Studio 2022+

Troubleshoot, debug, and resolve development and production issues

Perform unit, integration, and regression testing to identify software defects

Work with RESTful APIs and backend services

Follow established architecture patterns (MVVM) and design specifications

Apply mobile development best practices for performance, security, and maintainability

Participate in Agile meetings/processes and collaborate with QA, product, and backend teams

Work Experience / Knowledge

Strong experience developing applications with .NET MAUI

Proficient in C# and .NET application development

Experience working with Xamarin / Xamarin.Forms (legacy or migration support)

Experience implementing native platform features within MAUI

Working knowledge of iOS and Android application lifecycles

Experience consuming RESTful APIs

Proficient understanding of source control and branching strategies (TFS)

Experience with mobile app publishing and store compliance

5–10 years of experience in mobile or application development

Work Demands

Ability to manage competing priorities and meet critical deadlines

Ability to support a customer base with high service-level expectations

Qualifications / Certifications

Bachelor’s degree or equivalent work experience required

Degree in Engineering, Computer Science, or Information Systems preferred

Technical Experience

Visual Studio 2026

.NET MAUI

C#

Xamarin / Xamarin.Forms

MVVM architectural pattern

REST / Web API / JSON

SQL Server & SQL Databases

SQLite

TFS (Azure DevOps)

GIT

Postman

HTML / CSS

JavaScript

WCF / REST Services

iOS and Android publishing workflows

Apple App Store Connect

Google Play Console

Equal Opportunity Employer. M/F/D/V

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