Justin Goshorn

Harrisburg, Pennsylvania

goshornjustin3@gmail.com

LinkedIn | GitHub |

Professional Summary

Mobile Development specialist with 3+ years delivering production cross-platform applications across defense, fintech, and IoT industries. Proven track record of taking apps from zero to App Store launch in under 90 days and reducing bugs by 90% through comprehensive testing strategies. Experienced bridging with native Android and iOS layers including JNI, Dart FFI, and Bluetooth integrations.

Technical Skills

Mobile & Integrations

Riverpod, Flutter Bloc, Deep Linking, QR/Barcode Scanning, 2D Animations, Rive Animations, Hive, USB Serial, Bluetooth, Push Notifications, FFI, Method Channels

Languages & Frameworks

Flutter, Dart, React Native, Kotlin, Swift, Java, C#

Backend & APIs

SQL, NoSQL, Firebase, Supabase, .NET Libraries, Encryption, Offline Storage

Tools & Practices

Agile, CI/CD, Git, Automated Testing, Technical Documentation, Clean Architecture

Professional Experience

Confidential Defense Client

Mobile Developer (Contract) — Remote

March 2026 – May 2026

  • Architected and delivered an Android application enabling end users to configure a Close Quarters Sight.
  • Integrated real-time reticle configurations via Bluetooth and USB using JSON RPC, returning reticle data from the firmware under 800ms in worst cases.
  • Architected a flexible data model supporting multiple weapon profiles with up to three customizable reticles each, enabling tailored configurations per operational scenario.
  • Integrated JNI method channels to leverage a ballistics library for high-precision ballistic calculations, bridging Flutter and native Android layers.
  • Integrated offline data storage using Hive to retain reticle configurations across sessions without connection dependency.
  • Designed and implemented custom widgets and views to meet strict UI/UX specifications, ensuring precise reticle rendering and intuitive user interaction.
  • Worked with a team of 10 electrical, mechanical, and firmware engineers to ensure 100% accuracy with reticle components and design.
  • Application delivered and pending DoD contract award.

One Tank Propane Monitoring Solutions

Mobile Developer (Contract) — Remote

October 2025 – March 2026

  • Converted legacy Android and iOS application into a cross-platform Flutter production app actively being used by 100+ One Tank customers.
  • Integrated real-time tank monitoring through REST API giving the app load times of 200ms for tank lists exceeding 50 entries.
  • Designed custom gauges, widgets, and graphs for intuitive visualization of real-time customer tank data.
  • Integrated real-time alerts and push notifications to proactively warn customers of low tank levels and anomalies.
  • Created offline user data caching and encrypted storage for sensitive customer account credentials as per One-Tank customer safety requirements.
  • Live on app stores under the name One-Tank Pulse Monitor — App Store · Google Play.

PopStock Educational Services

Mobile Developer (Contract) — Remote

September 2025 – November 2025

  • Converted Android/Kotlin MVP into a cross-platform Flutter production app.
  • Integrated real-time stock trading, in-app currency, and live market data, gamifying financial education for students.
  • Implemented secure storage and authentication workflows to protect user data and ensure compliance with COPPA and FERPA.
  • Built WebSocket integrations for low-latency trading and interactive classroom updates with 500ms load times.
  • Developed custom character animations using Rive to create engaging, interactive user experiences.
  • Delivered for App Store deployment.

The Big 3 LLC

Independent Mobile Consultant — Remote

June 2023 – Present

  • Architected an AI-powered dietary analysis app featuring on-device machine learning for personalized nutrient recommendations — sole developer from wireframe to App Store launch.
  • Built a privacy-first menstrual cycle tracker with encrypted offline storage, interactive calendar, and push notifications — zero data leaves the device.
  • Reduced application bugs by 90% across client projects through comprehensive unit, widget, and integration testing suites.
  • Enabled Flutter/native interop by leveraging Dart FFI to execute C# logic within mobile applications, bridging .NET libraries into cross-platform workflows.
  • Accelerated deployment cycles through automated CI/CD pipelines, reducing manual release errors.
  • Integrated Firebase, deep linking, QR scanning, and offline storage across multiple production applications.

Projects

NTWKD — Productivity Contact Sharing App

Cross-platform Flutter productivity app for streamlined professional contact sharing, live on both Apple Store and Google Play.

  • Built with Flutter and Firebase supporting real-time contact sharing and user profiles.
  • Implemented CI/CD pipeline for automated deployment to both platforms.
  • 100+ downloads.

App Store · Google Play

Fitness & Nutrition Application

Personal Project

  • Nutrition and diet tracking with workout logging.

GitHub Repository

Video Chat Application

Personal Project

  • Social app with live video chat, in-app messaging between users, media sharing, and location sharing.

GitHub Repository

Education

Penn State University

Bachelor of Science, Management Information Systems

Concentration: Application Development · Graduated December 2022