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I'm a senior app developer with over 12 years of experience. I've built apps for major companies such as The Hershey Company, Advaxis Immunotherapies, Health Advocate, Synchronoss Technologies, Penn National Gaming, the FAA, and WorkWave. I believe I can deliver whatever your mobile app needs.…

Mara Klinkhammer

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I'm a senior app developer with over 12 years of experience. I've built apps for major companies such as The Hershey Company, Advaxis Immunotherapies, Health Advocate, Synchronoss Technologies, Penn National Gaming, the FAA, and WorkWave. I believe I can deliver whatever your mobile app needs.…

Available to hire

I’m a senior app developer with over 12 years of experience. I’ve built apps for major companies such as The Hershey Company, Advaxis Immunotherapies, Health Advocate, Synchronoss Technologies, Penn National Gaming, the FAA, and WorkWave. I believe I can deliver whatever your mobile app needs.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Software Engineer at WorkWave

February 1, 2025 - September 12, 2025

PestPac Mobile: WorkWave’s flagship pest-control app. Built with .NET 8/C#; release leader for a key feature; integrated new REST services with existing code; collaborated with QA to ensure smooth releases.

Computer Scientist 5 at ASRC Federal Holding Company

October 1, 2021 - September 12, 2025

TAP Mobile: Portal App for FAA technicians to track activities. Built using Xamarin.iOS/C#. UI built with Storyboard and MonoTouch.Dialog; SAFe Agile methodologies applied during development.

Mobile Developer and DevOps at Penn National Gaming

March 1, 2020 - September 12, 2025

Red Carpet Rewards: Loyalty rewards app enabling entrants to participate in contests by bringing their phones to select locations with iBeacon detection. UI built with Storyboards; DevOps pipeline in Jenkins; integrated REST services and location features.

Xamarin Developer at GWR Medical

September 1, 2019 - September 12, 2025

GWR Sales: Salespeople app; MVVM-based UI using Xamarin.Forms; mentored junior developers; MVVM architecture patterns adhered.

Xamarin Developer at Bank Mobile

May 1, 2019 - September 12, 2025

T-Mobile Money: Banking app for customers; UI built with Xamarin.Forms and XAML; created reusable packages using NuGet and .NET Core; MVVM architecture applied.

Senior Mobile Application Developer at ANEXINET

October 1, 2018 - September 12, 2025

Customer Experience Platform: Modular platform enabling rapid development of customized mobile self-service apps; integrated 3rd‑party authentication; ARKit demos; RFID scanning; REST service integration; Realm‑backed data; Active Directory integration via REST.

Mobile Application Developer at Rodale, Inc.

November 1, 2014 - September 12, 2025

Rodale Uber App: Mobile platform extension; modular code with CocoaPods; bridging JavaScript to native Objective‑C; REST data integration.

iOS Developer at The Hershey Company

February 1, 2014 - September 12, 2025

DSM Work With App: iPad app for District Sales Managers; Tim E Entry: sales timing entry; TORCH: flagship iPad app for consultants and key decision makers; implemented in Objective‑C/Swift with UIKit and Storyboard.