Matthew Callahan
Sr. Application Developer
Phoenix, Arizona, United States
Summary
👤
Senior🎓
Top SchoolMatthew Callahan is a senior application developer and player-coach with over a decade of experience building and leading GIS-enabled web and desktop solutions that improve operations and site selection for enterprise clients. Comfortable shipping code and mentoring teams, he has led architecture, testing standards, and release practices across distributed teams at CBRE, Republic Services, Carvana, and Theorem. His expertise spans C#, .NET, ArcGIS tooling, Python, and front-end JavaScript, and he’s repeatedly driven efforts to standardize architectures, increase test coverage, and accelerate greenfield delivery. Based in Phoenix, he combines hands-on implementation with people leadership—having managed remote engineering teams and coached nine direct reports—while maintaining a long-running personal curiosity about the information landscape that dates back to the internet’s early days.
10 years of coding experience
11 years of employment as a software developer
Bachelor’s Degree Geographic Information Systems, Bachelor’s Degree Geographic Information Systems at University of Wisconsin-MadisonWheaton Warrenville South High School
Stackoverflow
175reputation
126kreached
11answers
9questions
Github Skills (100)
visual-studio10
fsharp10
dotnet-cli10
dotnet10
editor10
code-organization10
arcgis-js-api10
electron10
nuxt-content10
typescript10
vscode-extension10
vscode10
ddd10
csharp10
visual-studio-code10
Programming languages (10)
Github contributions (5)
mfcallahan/mfcallahan-api
Feb 2018 - Mar 2023
This repository contains a sample REST API created with .NET 5. It is deployed to Azure as an App Service. This project demonstrates the patterns and best practices I like to leverage in the .NET software I develop, including dependency injection, SOLID principles, unit testing, and clean code organization.
Contributions:1 PR, 117 pushes, 12 branches in 5 years 1 month
injectionunitpatternsnet-5deployed
mfcallahan/angular-signalr-demo
Nov 2020 - Sep 2022
This repository contains an application built with .NET 7 and Angular 15, demonstrating how to implement SignalR which enables real-time communication between the client and server.
Contributions:68 commits, 8 PRs, 57 pushes in 1 year 11 months
communicationsignalrnet-5angularangular-12
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