J. Campbell

Principal Software Engineer · iOS / Web3 / AI-assisted systems

hire@jays.bio · linkedin.com/in/cocoadev · Paducah, KY · Remote

Summary

Principal engineer with 15+ years shipping secure, performant software at scale. Deep expertise in Apple platforms (Swift, Objective-C) complemented by full-stack Web3, AI-assisted development, and backend systems experience. Track record delivering in regulated environments (Citi, AmEx, Capital One) and leading technical migrations across native, cross-platform, and emerging platforms. Co-founded three companies; one successfully exited.

Technical Skills

Languages: Swift, Objective-C, TypeScript, JavaScript, Solidity, Python, Dart, Java
Mobile: UIKit, SwiftUI, Combine, async/await, HealthKit, Bluetooth LE, React Native, Flutter
Web3: Solidity, Hardhat, Foundry, OpenZeppelin v5, ERC-20/721/1155, multi-chain architecture
AI/ML: Model Context Protocol (MCP), LLM context engineering, agent orchestration, Claude, Ollama, MLX
Backend/Cloud: AWS (CDK, DynamoDB, S3), PostgreSQL, Docker, REST, WebSockets
Practices: CI/CD, TDD, Agile/Scrum, accessibility, HIPAA, financial compliance

Experience

Principal Engineer — Fork Development Corp.
2025 – Present · Remote · Self (LLC)
Mobile Engineer — FIS (via Kforce)
Jun 2024 – Dec 2024 · Remote · Contract
Senior iOS Engineer — Capital One (via Computer Futures)
Jul 2022 – Dec 2023 · Remote · Contract
Technical Project Manager — Kaiser Permanente (via Deloitte)
Oct 2021 – Jul 2022 · Remote · W2
Senior iOS Engineer — Walmart Global Tech (via Caspex)
Mar 2021 – Sep 2021 · Remote · Contract
Senior iOS Engineer — American Express
Feb 2019 – Feb 2021 · Phoenix, AZ / Remote · Direct
Senior iOS Engineer — Universal Studios (via TEKpartners)
Mar 2018 – Sep 2018 · Orlando, FL · Contract
iOS Tech Lead / Architect — IBM iX (Citibank engagement)
Feb 2015 – Jan 2018 · New York, NY / Remote · W2
Senior iOS Engineer — Lonely Planet
Mar 2014 – Feb 2015 · Nashville, TN / Remote · Direct
iOS Engineer & Instructor — Big Nerd Ranch
Nov 2011 – Feb 2014 · Atlanta, GA · Direct

Entrepreneurial

Technical Co-Founder — PreventScripts (fka Personal Medicine Plus)
2014 – Present · Remote patient monitoring · Bootstrapped + raised
Co-Founder — Apex Internet Services
Jul 1995 – May 2000 · Western KY · Profitable exit

Education

Murray State University — Computer Science, 1991–1995

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