J. Campbell

Forward Deployed Engineer · Agent wrangler · Polyglot shipper

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

Profile

Builder who embeds with customers and ships. 15+ years translating ambiguous domain problems into working software across Apple platforms, web, Web3, and AI-native systems. Recently solo-built a 9-tenant multi-tenant SaaS platform (SmolNerd Farm) with a canonical agent-chat library, MCP tool integration, and local LLM orchestration. Polyglot by necessity, not resume-padding: Swift, TypeScript, Solidity, Python, Dart, bash. Comfortable in Fortune 100 compliance environments (Citi, AmEx, Capital One) and in a county courthouse digging through parcel records. Co-founded three companies; exited one.

What I Do

Selected Work

Principal / Forward Deployed Builder — Fork Development Corp.
Jan 2025 – Present · Remote · Self (LLC)
Senior Mobile Engineer — Fortune 100 Financial Services
2019 – 2024 · AmEx · Walmart · Capital One · FIS · Kaiser · Remote & on-site
iOS Tech Lead / Architect — IBM iX (Citibank engagement)
Feb 2015 – Jan 2018 · New York / Remote
iOS Engineer & Instructor — Big Nerd Ranch
Nov 2011 – Feb 2014 · Atlanta, GA

Earlier

Ventures

Stack

Agents/AI: Model Context Protocol (MCP), tool orchestration, agent sandboxing, Claude, Ollama, LM Studio, exo, MLX, Qwen, context engineering, multi-tier routing
Languages: Swift, Objective-C, TypeScript, JavaScript, Solidity, Python, Dart, Java, bash, SQL
Backend: Node, Express, Prisma, PostgreSQL/PostGIS, Redis, BullMQ, WebSockets, Docker, Next.js
Mobile: UIKit, SwiftUI, Combine, async/await, HealthKit, Bluetooth LE, React Native, Flutter
Web3: Solidity, Hardhat, Foundry, OpenZeppelin v5, ERC-20/721/1155, Ethereum, Base L2, Reth
Ops: bash orchestration, launchd, ngrok, Tailscale, AWS CDK, CI/CD, TDD, HIPAA, financial compliance

Proof