Portfolio of David Silverlight
👋 Hi, I'm David — a developer who genuinely loves this stuff. I've spent years happily building apps across a parade of technologies — spent some time authoring a monthly Q&A column for XML Journal back in my XML-geek days, through Silverlight and Xamarin.Forms, to .Net MAUI as an early adopter where I have been laser focused from day one. I'm endlessly curious, love to learn and lately I'm having a blast exploring how AI can help me build better and faster.
How I Help
Whether you or your team needs help meeting a tight deadline, someone to help with heavy lifting, modernizing a legacy Xamarin.Forms app, or a dependable hand to carry a mission-critical deliverable from start to finish, I'd welcome the conversation.
Feel free to call me at 561-212-5707 or email me at DavidSilverlight@gmail.com — I'm always glad to talk through how I can help.
.NET MAUI Applications
RamTech gMobile 2025–2026
.NET MAUI · Esri/GIS · FeaturedEsri/ArcGIS field-inspection app for damage assessment, leak survey, and gas-insight inspections. Delivered UX/performance work, then re-architected workflows into a vNext release with a single centralized mapping surface — ~30% fewer clicks per feature and ~20s of load-time initializations eliminated.
Tech: .NET MAUI, Prism, Esri ArcGIS Maps SDK, Telerik UI for .NET MAUI, SQLite
Safe4Dogs
.NET MAUI · Open Source · FeaturedDetermines whether foods are safe for dogs, and doubles as a teaching codebase for mentoring developers across core .NET MAUI concepts — MVVM, handlers, Shell, DI, converters, behaviors, and localization.
Tech: .NET MAUI, MVVM, SQLite, REST, CommunityToolkit.Maui, CommunityToolkit.Mvvm
UPS Mobile Delivery 2023–2024
.NET MAUI · Enterprise · Featured.NET MAUI feasibility spike for the UPS driver app on the DIAD 6 handheld. Validated Trimble Maps and barcode scanning under .NET MAUI, rebuilt the in-house component library, and removed Prism in response to licensing changes.
Tech: .NET MAUI, Trimble Maps, MAUI Essentials, CommunityToolkit.Mvvm, SQLite
ATrack Mobile 2026
.NET MAUI · Clinical · FeaturedAll-in-one data-collection and clinical-practice platform for Applied Behavior Analysis (ABA) therapy and autism providers. Cleared a large defect backlog, shipped new features, fixed migration defects, and designed a configurable Sentry/UXCam crash-and-analytics layer.
Tech: .NET MAUI, Prism.Maui, CommunityToolkit.Maui, DevExpress, Sentry.Maui, Sharpnado, SQLite, UXCam
Kudurru Stone UX Refresh
.NET MAUI · UX · FeaturedA mobile UX refresh for the Kudurru Stone land-surveying field app — modernizing the look and streamlining navigation across login, schedule, job details, maps and time tracking. A full before → after redesign.
Tech: .NET MAUI, MVVM, Shell, Maps & Geolocation
Kinship Navigator Washington, DC
.NET MAUI · Gov / Social · FeaturedA .NET MAUI application providing tools for users to apply for subsidies and Emergency Financial Assistance for caretakers of children in need — funding food, housing and essentials. Architected on .NET MAUI, MAUI Essentials, CommunityToolkit.MVVM and RESTful services communicating with a Dynamics back end. Most notably, it was delivered within an extremely tight timeframe tied to payment terms that could have meant catastrophe for the client if missed — and through a steadfast focus on the MVP requirements, the app shipped successfully inside the deadline.
Tech: .NET MAUI, MAUI Essentials, CommunityToolkit.MVVM, RESTful Services, Dynamics
SmartCard 2026
.NET MAUI · FeaturedA feature-rich .NET MAUI app that simplifies access to the business, social and scheduling details that matter most. I led the codebase transition and review, built the infrastructure that let new team members advance the codebase, delivered the MVP feature set, and architected for future roadmap milestones — as development pushed forward at an impressive velocity.
Tech: .NET MAUI, MVVM, Shell, Clean Architecture
DCPro .NET MAUI
.NET MAUI · FeaturedA .NET MAUI tool that turns a dry-cleaning facility's floor plan into a live heat map — revealing high-traffic paths and equipment zones so owners can pinpoint problem areas and act on the hottest spots.
Tech: .NET MAUI, MVVM, Custom Graphics / Heat Map
MovieBuff
.NET MAUI · FeaturedMovie & show ticketing app MVP — ticket purchasing, text/MRU search, OTP authentication, and a discussion system with threaded replies and emoji reactions. Integrated an existing REST API and implemented a Figma-based UX.
Tech: .NET MAUI, Telerik UI for .NET MAUI, MVVM, REST, CommunityToolkit.Mvvm, SQLite
SearchMed
.NET MAUI · FeaturedA .NET MAUI app for customers to search for medical professionals. Improved app performance by ~30% and reduced load times by ~50%.
Tech: .NET MAUI, Firebase, MVVM, CommunityToolkit.MVVM, CommunityToolkit.Maui, SQLite
POS Prototype
.NET MAUI · Windows · FeaturedWindows-based point-of-sale prototype demonstrating user/admin login, category and product display, swipe navigation, purchasing, discounts, and configurable payment/receipt/order settings.
Tech: .NET MAUI, MVVM, CommunityToolkit.Maui, CommunityToolkit.Mvvm, InAppBilling, Sentry, Telerik
Numbers
.NET MAUI · FeaturedCompleted development of the initial release under a critical deadline tied to a scheduled social event.
Tech: .NET MAUI, MVVM, SQLite, Newtonsoft, InAppBilling, Telerik, CommunityToolkit.Maui, CommunityToolkit.MVVM
Xamarin.Forms Applications
Marcel 2019
Xamarin.Forms · AI · FeaturedAs a badged Microsoft contractor on the Microsoft campus, helped build the initial release of Marcel — an AI-powered platform connecting 80,000 employees to find collaborators, schedule meetings, and track deliverables.
Tech: Xamarin.Forms, Microsoft AI, Prism, REST · with Publicis.Sapient
T-Mobile Money 2017–2019
Xamarin.Forms · FintechCustomer-facing Banking-as-a-Service app with 300+ screens — account transfers, perks, CUI notifications, ATM/cash-deposit locators, card activation, and fund management.
Tech: Xamarin.Forms, MVVMCross, Google Maps SDK, REST, Xamarin.Essentials
Sherlock Talent Xamarin.Forms
Xamarin.Forms · Job Search · FeaturedA set of tools job seekers consider an invaluable resource — offering more than state-of-the-art guidance to find the perfect job. Sherlock Talent acts as a partner, always at the ready to strengthen trust and build a long-term relationship as your career goals grow with you.
Tech: Xamarin.Forms, REST APIs, Xamarin.Essentials, Conversational UI, iOS & Android
UAS Trakker
Xamarin.Forms · Drone/GIS · FeaturedEmpowers custom Unmanned Aerial Systems to locate, track, and follow radio-frequency personal locator beacons attached to people engaged in risk-prone activities.
Tech: Xamarin.Forms, Google Maps SDK, Microsoft Azure Cloud Services
Pet Pixie
Xamarin.Forms · Social · FeaturedSocial-sharing app for pet parents to share photos, receive reminders, and store vet info — released on iOS and Android.
Tech: Xamarin.Forms, MVVMCross
Real Green Systems by WorkWave
Xamarin.Forms · Field ServiceProductivity app connecting lawn care and landscaping field technicians with the back office. Crews clock in, load the day's route, review customer history and service codes, navigate between stops and the depot, time every job, and document work offline — syncing back to the office whenever a signal allows.
Tech: Xamarin.Forms, MVVM, Offline-first Sync, SQLite, RESTful Services, Maps & Navigation, Xamarin.Essentials
MVP HealthCare — Gia NY & VT
Xamarin.Forms · Healthcare · FeaturedGia by MVP Health Care puts a health plan in the member's pocket — 24/7 virtual care with certified clinicians (urgent care by phone, everyday care by in-app messaging, behavioral health by video), doctor and facility search, digital ID cards, and claims that read like receipts: charges, what MVP saved you, and your actual cost, with the EOB one tap away. Free for most MVP members.
Tech: Xamarin.Forms, MVVM, RESTful Services, Secure Member Auth, PDF (EOB) Viewing
Club Holiday Holiday Oil · Utah
Xamarin.Forms · Loyalty · FeaturedThe official loyalty app for Holiday Oil's 60+ Utah convenience stores. Members enroll in Club Holiday, earn and track points, scan a register-ready barcode straight from the home screen, redeem points for mobile coupons, fill digital punch cards for the Tornado, Coffee and Slush clubs, and find nearby stores with live fuel prices — plus activate a car wash directly from the vehicle. Built end-to-end as sole mobile developer on Xamarin.Forms, the framework .NET MAUI directly evolved from.
Tech: Xamarin.Forms, MVVM, RESTful Services, Xamarin.Essentials, Maps & Geolocation, Barcode Rendering
Waggy
Native iOS · Learning · FeaturedA learning project I built to get a hands-on feel for what developing a native iOS app requires, compared against Xamarin.Forms — the technology I've long considered my go-to choice for mobile development. A playful pet photo-album app that frames your pets like gallery art.
Tech: Native iOS (Swift), for comparison with Xamarin.Forms
B4UFly
Xamarin.Forms · Drone · FeaturedHelps unmanned-aircraft operators determine whether airspace restrictions or requirements are in effect at a chosen flight location.
Tech: Xamarin.Forms, iOS & Android
Viktre Athletes
Xamarin.Forms · Sports / Social · FeaturedViktre is all about the athlete — a private social network for athletes to connect and collaborate, a public network for athletes to engage with fans and followers, and a 24/7 streaming page filled with compelling content about the world of the athlete, both in and outside of sports.
Tech: Xamarin.Forms, live streaming, iOS & Android
BCBS - My BluePrint Analysis & Roadmap
Xamarin.Forms · Healthcare · FeaturedA deep analysis of the Blue Cross Blue Shield My BluePrint member app — covering application performance, App Store feedback, customer engagement, resolution of high-frequency exceptions, and accessibility compliance — delivered as a prioritized roadmap that schedules each identified area by timeframe and order, tackling the highest-priority issues first.
Tech: Xamarin.Forms, Performance Profiling, App Store Analytics, Accessibility, Exception Triage
Nalco Lock App
Xamarin.Forms · Field · FeaturedField tool for installation specialists to fit new tank locks, generate unique combos, and document details via a backend service — built on a condensed timeline to support installation of 28,000 tanks on schedule.
Tech: Xamarin.Forms, MVVM, REST, Microsoft SSO, BarcodeScanner, SimpleAudioPlayer
Salon Scheduler 2016–2017
Clover POS · FeaturedClover POS app for salon professionals — appointment scheduling, SMS reminders, notes, and order history, with unlimited employees/stations syncing across all stations.
Tech: Clover POS, Xamarin.Forms
Moji
Xamarin.Forms · Social · FeaturedA social networking app built around "spheres" that organize the major areas of your life and simplify grouping and dividing the things that matter to you. Moji centers on an innovative control that gives you full command over access — ranging from broad, sweeping controls down to very small, very specific ones.
Tech: Xamarin.Forms, iOS & Android
AsTech 2.0 Automotive
Xamarin.Forms · Automotive · FeaturedCloud-based companion app for asTech, the leader in remote diagnostic solutions for automotive shops. It brings the convenience of asTech's patented remote-scanning device and staff of master technicians into a mobile experience — view scan reports, submit new scan requests, and review important documents to improve shop cycle time, wherever you go.
Tech: Xamarin.Forms, REST / Cloud, iOS & Android
ITPalooza 2013 2013
Xamarin · Event · FeaturedCompanion app for ITPalooza — South Florida's tech-community conference for networking, learning and charitable giving. Attendees review and select sessions, give session and conference feedback, and build a personal schedule of the day. Architecture, interaction design and UI/UX.
Tech: Xamarin, iOS & Android
ITPalooza 2016 2016
Xamarin.Forms · Event · FeaturedThe 5th-annual companion app for ITPalooza — South Florida's tech-community conference. A native, cross-platform experience with a social feed, favoritable and ratable sessions, an events schedule, hands-on Mini-Hacks, and venue, map and sponsor info. Themed "Cloud, Security, IoT & Me."
Tech: Xamarin.Forms, iOS & Android
South Florida Code Camp 2015
Xamarin.Forms · Event · FeaturedCompanion app for South Florida Code Camp — the community conference for networking, learning and giving back. Sessions, speakers, itinerary and feedback, built by a South Florida Xamarin User Group team on the reusable Eventarin codebase. I served as Technical Team Lead.
Tech: Xamarin.Forms, Eventarin codebase, iOS & Android
XML Journal
The following articles are from a monthly Q&A column titled "Shedding a little Light on XML," which I authored for XML Journal back when I was a hardcore XML geek. You can read them below, or view them on my website, XMLPitstop.com. While the site is no longer actively maintained, it is still live and displaying the articles on my HeadGeek Articles page.
Silverlight Applications
National WorkFlow
Silverlight · FeaturedMission-critical workflow services used in both daily and month-end processing.
Focus: Architecture, UI/UX, Information Architecture
Crescendo Patient CRM
Silverlight · VideoHome-healthcare customer relationship management (CRM) platform.
Focus: Engineering, Visual Effects, Web Development
UnbeatableGeek.com
Silverlight · FeaturedGeeky competition website for organizing fun events at developer conferences.
Focus: Interaction Design, Web Design, Web Development
Microsoft Hosting University
Silverlight · FeaturedBuilt the Silverlight user experience for the award-winning Microsoft Hosting University with Merit Mile — rich-media presentations and custom video delivering a self-guided tour of the Microsoft Dynamic Data Center Toolkit (DDCTK). Winner of 3 coveted 2010 Communicator Awards.
Focus: Advertising, Web Design, Web Development
Property Tax System
Silverlight · FeaturedProperty tax assessment system developed in Microsoft Silverlight.
Focus: Interaction Design, UI/UX, Web Development
Silverlight User Group Starter Kit
Silverlight · FeaturedA solid, reusable codebase for Silverlight User Group websites — a fast head start and a reference implementation for how Silverlight, MVVM and RIA Services work together.
Tech: Silverlight, MVVM, RIA Services
Property Tax System SL5
Silverlight 5 · FeaturedTax assessment system built in Silverlight 5, RIA Services, MVVM, .NET and SQL.
Tech: Silverlight 5, RIA Services, MVVM, .NET, SQL Server
My Christmas Catalog
Silverlight · FeaturedAdvised and consulted for Catalog Enterprises to optimize the installation/deployment experience and user tracking for this visually engaging site.
Focus: Web Design, Web Development
Polaris
Silverlight · FeaturedLarge-scale Silverlight line-of-business (LOB) application for the telecom leasing industry, tracking every aspect of cell-tower ownership across modules with dozens of screens. Owned the Site Administration application.
Tech: Silverlight, RIA Services, MVVM, Blend, SQL Server, ADO.NET EF, LINQ
Egghead Cafe — Silverlight Navigation
Silverlight · FeaturedA unique, immersive interface for the Silverlight version of EggheadCafe.com — built the new navigation system and the Forum-section UI.
Focus: Web Design, Web Development
Materials Database Application
Silverlight · FeaturedTracks materials, inventory and scheduling for materials used in mobile devices — schedule requests, search materials, define output templates and customize material details.
Tech: Silverlight, MVVM, RIA Services
.NET Websites
NonProfitWays
ASP.NET · FeaturedA community site I created pairing new ASP.NET developers with seasoned mentors to build websites for not-for-profit organizations — hands-on experience for newcomers and a high-quality site at no cost for nonprofits.
Tech: ASP.NET, .NET
Community-Credit.com
.NET · FeaturedA community reward system — "We give stupid prices to smart people" — where users log community work (blogging, speaking, mentoring) to earn points, and top earners win geeky prizes.
Focus: Interaction Design, Web Design
XMLPitstop.com
.NET · XML · FeaturedOnce the largest source of XML-related resources on the web.
Focus: Web Development, Writing
Ineta.org
.NET · FeaturedInternational .NET Association — a Microsoft-sponsored organization of top speakers and thought leaders supporting the .NET and developer community.
Focus: Web Development
RealTechnologyHeroes.com
.NET · Humor · FeaturedA humor site poking fun at fellow computer geeks, modeled on the "Real American Heroes" Bud Light commercials.
Focus: Web Development
Frequently Asked Questions
What does David Silverlight specialize in?
Senior .NET MAUI developer for enterprise mobile apps, Xamarin.Forms migrations, project rescue, and high-stakes delivery.
Am I currently available to take on new projects?
Yes, I am, feel free to call me at 561-212-5707 or email me at DavidSilverlight@gmail.com
Do you use AI tools like Claude Code, and does that affect quality?
Yes — I use AI tools like Claude Code to work faster and explore ideas, but they don't run the show. Years of hands-on development mean I can read a suggested solution and know when it's the right call and when it isn't, so I accept what genuinely improves the code and reject what doesn't. The result is speed without sacrificing quality.