Available to hire
I’m Gary Campbell, a senior mobile architect and developer with 13+ years of object-oriented software experience and 5+ years focused on native Android using Java and Kotlin. I enjoy building reliable mobile systems end-to-end—from early architecture through production—while keeping code quality high through reviews, mentoring, and thoughtful technical decisions.
Language
English
Advanced
Work Experience
Senior Mobile Developer at Resourgenix
January 1, 2024 - September 1, 2026Spearheaded integration of React Native into existing native Android environments by building robust native bridge modules to support complex cross-platform data passing and feature requirements. Modernized application architecture by implementing Dagger for dependency injection and Moshi for streamlined JSON parsing. Drove key architectural decisions and executed cross-platform migrations to reduce native technical debt while improving maintainability and scalability.
Developer (Contract) at AO Group
November 1, 2021 - January 1, 2024Worked as the sole developer on the DragonPass project, architecting and implementing a messaging layer on AWS (EC2) using Java 11 and Spring Boot. Built a data pipeline to ingest pipe-delimited documents, transform them to CSV, validate fields, and generate errors for invalid data. Managed bidirectional communication with international endpoints and persisted validated and merged data to an SQL database.
Lead Android Developer & Architect at Innovius Systems
June 1, 2017 - November 1, 2021Led design, development, and debugging of multiple applications, translating business requirements into technical specifications and maintaining software quality through code reviews and mentoring. Key work included a paperless commuter ticket booking application with Firebase authentication, Google Maps, EMV payments, QR ticketing, and Bluetooth/WiFi printer connectivity. Also delivered an access control system with multi-threading via a recycling pool, Camera2 image capture, barcode reading, and floor plan GPS tracking; additionally served as sole developer/architect for an organization app with chat, media streaming, RSS, courses, and social integrations.
UI/UX Developer & POS Implementer at Carma Business Systems
August 1, 2014 - February 1, 2016Delivered UI/UX-focused work and usability testing for a retail/POS environment, supported planning and rollout of the CarmaPos system, and helped generate distribution networks. Participated in key product and internal tool planning efforts, combining user-centered improvements with practical implementation support.
Education
Oracle Certification (1Z0-808) at Oracle
January 11, 2030 - September 15, 2026Oracle Certification (1Z0-819) at Oracle
January 11, 2030 - September 15, 2026Google Associate Android Developer (Kotlin/Java) at Udemy
January 11, 2030 - September 15, 2026Java Master Class (Certificate of Completion) at Udemy
January 11, 2030 - September 15, 2026Flutter Certification at Udemy
January 11, 2030 - September 15, 2026Theology Rhema (Incomplete Degree) at Theology Rhema
January 11, 2030 - September 15, 2026Horticulture N5 at Thornton College
January 11, 2030 - September 15, 2026Qualifications
Oracle Certification 1Z0-808
January 11, 2030 - September 15, 2026Oracle Certification 1Z0-819
January 11, 2030 - September 15, 2026Google Associate Android Developer (Kotlin/Java)
January 11, 2030 - September 15, 2026Java Master Class (Certificate of Completion)
January 11, 2030 - September 15, 2026Flutter Certification
January 11, 2030 - September 15, 2026Industry Experience
Software & Internet, Transportation & Logistics, Financial Services, Education, Professional Services
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