Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I'm Tim Belvin, a mobile app developer with 15+ years of experience building enterprise-grade mobile solutions from MVP to scale. I specialize in cross-platform development with .NET MAUI and Xamarin, backend APIs, and database architecture. I also serve as a board advisor for MedTech startups, bringing deep GDPR and HIPAA expertise to patient data systems and regulatory alignment. I've co-founded startups and led teams to deliver products from concept through deployment, generating significant business impact across industries including manufacturing, healthcare, retail, and aerospace. My hands-on skills span BLE integration, computer vision, geolocation, real-time data, and systems design, with a focus on clean code, scalable architecture, and autonomous delivery in fast-paced environments.…I'm Tim Belvin, a mobile app developer with 15+ years of experience building enterprise-grade mobile solutions from MVP to scale. I specialize in cross-platform development with .NET MAUI and Xamarin, backend APIs, and database architecture. I also serve as a board advisor for MedTech startups, bringing deep GDPR and HIPAA expertise to patient data systems and regulatory alignment. I've co-founded startups and led teams to deliver products from concept through deployment, generating significant business impact across industries including manufacturing, healthcare, retail, and aerospace. My hands-on skills span BLE integration, computer vision, geolocation, real-time data, and systems design, with a focus on clean code, scalable architecture, and autonomous delivery in fast-paced environments.

Tim Belvin

App Developer, Web Developer, Full Stack Developer, +2





I'm Tim Belvin, a mobile app developer with 15+ years of experience building enterprise-grade mobile solutions from MVP to scale. I specialize in cross-platform development with .NET MAUI and Xamarin, backend APIs, and database architecture. I also serve as a board advisor for MedTech startups, bringing deep GDPR and HIPAA expertise to patient data systems and regulatory alignment. I've co-founded startups and led teams to deliver products from concept through deployment, generating significant business impact across industries including manufacturing, healthcare, retail, and aerospace. My hands-on skills span BLE integration, computer vision, geolocation, real-time data, and systems design, with a focus on clean code, scalable architecture, and autonomous delivery in fast-paced environments.…I'm Tim Belvin, a mobile app developer with 15+ years of experience building enterprise-grade mobile solutions from MVP to scale. I specialize in cross-platform development with .NET MAUI and Xamarin, backend APIs, and database architecture. I also serve as a board advisor for MedTech startups, bringing deep GDPR and HIPAA expertise to patient data systems and regulatory alignment. I've co-founded startups and led teams to deliver products from concept through deployment, generating significant business impact across industries including manufacturing, healthcare, retail, and aerospace. My hands-on skills span BLE integration, computer vision, geolocation, real-time data, and systems design, with a focus on clean code, scalable architecture, and autonomous delivery in fast-paced environments.

Available to hire

I’m Tim Belvin, a mobile app developer with 15+ years of experience building enterprise-grade mobile solutions from MVP to scale. I specialize in cross-platform development with .NET MAUI and Xamarin, backend APIs, and database architecture. I also serve as a board advisor for MedTech startups, bringing deep GDPR and HIPAA expertise to patient data systems and regulatory alignment.

I’ve co-founded startups and led teams to deliver products from concept through deployment, generating significant business impact across industries including manufacturing, healthcare, retail, and aerospace. My hands-on skills span BLE integration, computer vision, geolocation, real-time data, and systems design, with a focus on clean code, scalable architecture, and autonomous delivery in fast-paced environments.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Lead .NET Developer at Boeing

January 1, 2024 - September 26, 2025

Rebuilt a critical defect tracking system for airplane manufacturing with strict quality and compliance requirements. Integrated BLE sensors and AI-based computer vision for precision manufacturing. Delivered maintainable, scalable architecture using MVVM and local data storage.

Board Advisor at Thinkative

January 1, 2022 - Present

Healthcare Technology Advisor for a patient management application serving healthcare providers. Provided strategic guidance on GDPR and HIPAA compliance for patient data handling and privacy. Advised on mobile app architecture and scalable backend systems for healthcare workflows.

Senior Mobile Developer at Focus Brands

January 1, 2023 - September 26, 2025

Maintained and upgraded Xamarin Native apps serving multiple restaurant chains. Implemented secure payment systems (Apple Pay, Google Pay) with PCI compliance considerations. Integrated analytics platforms (Kochava, Firebase) for data-driven insights.

Lead Mobile Developer at Civic Site Service

January 1, 2022 - September 26, 2025

Built field service mobile app for elevator maintenance teams managing workflows and billing. Developed end-to-end solution with MAUI, Azure SQL backend, and real-time connectivity.

Lead Mobile Developer at BuildEz

January 1, 2021 - September 26, 2025

Delivered construction invoice processing app with integrated payment and compliance features. Built with Xamarin Forms and Azure SQL backend for secure document handling.

Lead .NET Developer at ITI

January 1, 2021 - September 26, 2025

Modernized educational media application using Xamarin Native and cloud storage. Implemented content generation features for training and educational use cases.

CEO/CTO/Co-Founder at 420 Tech, Inc

January 1, 2018 - September 26, 2025

Founded and scaled end-to-end retail platform for a highly regulated cannabis industry. Filed 8 patents, led an 8-person engineering team, deployed on Business Central and Azure. Navigated complex compliance requirements including seed-to-sale tracking and regulatory reporting.

CSO/CTO/Co-Founder at VisibleBrands

January 1, 2014 - September 26, 2025

Co-founded retail-facing digital advertising and IoT platform. Managed a 14-person team, filed 4 patents, launched using Xamarin and Azure.

Senior Program Manager at Microsoft

January 1, 2011 - September 26, 2025

Led mobile payment platform design and partner ecosystem development. Delivered Windows networking stack and embedded systems serving enterprise markets. Generated $2B+ business impact through strategic platform development.

Lead .NET Developer at Boeing

January 1, 2024 - September 26, 2025

Rebuilt a critical defect-tracking system for aerospace manufacturing with stringent quality and compliance requirements. Integrated BLE sensors and AI-based computer vision to enhance precision on production lines. Delivered a maintainable, scalable MVVM-based architecture with local data storage to meet safety and regulatory standards.

Board Advisor at Thinkative

January 1, 2022 - Present

Provided strategic guidance for Thinkative's patient management app, focusing on GDPR/HIPAA compliance and secure data handling. Advised on mobile architecture and scalable backend design to support healthcare workflows and regulatory requirements.

Senior Mobile Developer at Focus Brands

January 1, 2023 - September 26, 2025

Maintained and upgraded Xamarin Native apps across multiple restaurant brands. Implemented secure payment integrations (Apple Pay, Google Pay) with PCI considerations and integrated analytics platforms (Kochava, Firebase) to drive data-informed decisions.

Lead Mobile Developer at Civic Site Service

January 1, 2022 - September 26, 2025

Built a field service mobile app for elevator maintenance teams, delivering end-to-end workflows for service, billing, and real-time connectivity. Used MAUI with an Azure SQL backend to streamline field operations.

Lead Mobile Developer at BuildEz

January 1, 2021 - September 26, 2025

Delivered construction invoice processing app with integrated payment and compliance features. Built with Xamarin Forms and Azure SQL backend to ensure secure document handling and regulatory compliance.

Lead .NET Developer at ITI

January 1, 2021 - September 26, 2025

Modernized an educational media application using Xamarin Native and cloud storage, enabling offline access and syncing. Implemented content generation features for training and education scenarios.

CEO/CTO/Co-Founder at 420 Tech, Inc

January 1, 2018 - September 26, 2025

Founded and scaled an end-to-end retail platform for a highly regulated cannabis industry. Filed 8 patents, led an 8-person engineering team, and deployed on Business Central and Azure, navigating seed-to-sale compliance and regulatory reporting.

CSO/CTO/Co-Founder at VisibleBrands

January 1, 2014 - September 26, 2025

Co-founded a retail-facing digital advertising and IoT platform, managed a 14-person team, filed 4 patents, and launched using Xamarin and Azure. Pioneered scalable retail IoT solutions with a focus on architecture and performance.

Senior Program Manager at Microsoft

January 1, 2011 - September 26, 2025

Led mobile payment platform design and partner ecosystem development, delivering components of the Windows networking stack and embedded systems serving enterprise markets. Drove initiatives that contributed to over $2B in business impact.