Southern California

Joel Gumbayan

Marketing operations.
AI agent systems.
Ocean person.

Nice to meet you.

I run marketing like an engineering discipline — 8+ years across agency-side and B2B manufacturing, currently leading marketing for a Southern California manufacturer.

Paid social, lifecycle email to a five-figure contact database, closed-loop attribution — and the AI agent systems that run the repeatable work behind QA gates, so campaigns ship faster and nothing goes live broken.

Work

Marketing, engineered.

HubSpot · Attribution & UTM governance · Lifecycle email · Paid social · Funnel analytics · Claude/AI agent systems · Python · CRO

  • 1.4–3.0%paid social CTR
  • $0.30avg CPC
  • 26.7→31.9%email opens, 3 sends
  • 22AI skills in production
FLAGSHIP · 2026

AI Marketing Agent Harness

Custom display manufacturing company · 2026

Designed and built a production agent system that runs day-to-day marketing operations for a B2B manufacturer. A three-layer architecture (directives define the work, AI orchestrates, deterministic Python executes) coordinates 22 specialized skills across Claude Desktop, Claude Code, and Gemini — covering campaign intake, audience research, copywriting with automated brand-voice validation, landing page builds, UTM governance, and performance review.

The system is self-annealing: skills log their own failures, propose fixes, and improve with every campaign. Governance is engineered in, not hoped for — routing gates keep creative and execution work on the right platform, blocking QA gates stop launches with broken tracking, and credential separation isolates CRM access by machine. Integrated with HubSpot, GitHub, and Google Drive; every campaign artifact is version-controlled.

AI workflow implementationagent orchestrationmarketing ops governance
22
skills
3
platforms
2
machines
4
python scripts
3
MCP integrations
CAMPAIGN BRAINClaude Desktop · CoWork9 skills
Reddit Ad Architect Manager
Strategic Map Builder
Audience Context Builder
Reddit Creative Matrix
Design Brief Synthesizer
Campaign Season Conductor
Email Copy Writer
Segment Voice Validator
Performance Debrief Writer
EXECUTION ENGINEClaude Code4 skills
Subreddit Researcher
Weekly Template Generator
UTM Validator
Smart LP Campaign Builder
DESIGN LEADGemini Advanced2 skills
Ad Creative Direction
CSS Token Authoring
OUTPUTS
Email CampaignsUTM ReportsDesign BriefsPerformance DebriefsLP CopyLinkedIn Posts
// claude desktop · cowork — skill trigger
→ "run email-copy-writer · segment WSNOA · week 4"
// claude code — execution
$ python execution/validate_utm_links.py --dir .tmp/ --campaign 43215797-...
// cross-machine sync — mac → work pc
$ git push origin main
↑ click any skill to expand · 15 of 22 skills shownAuthoring: Mac · Execution: Windows 10 / Work PC
Custom display manufacturing · Marketing systems · 2026github.com/joelgum ↗

Builds

Experiments

Products designed, built, and launched solo — for the fun of it, outside the day job.

Crate Digger's Flip — pick your crate: Easy, Mixed, or Hard

GAME · 2026

Crate Digger's Flip

Hear the sample, name the record that flipped it. A hip-hop sample-guessing game — 145 curated pairs, difficulty scored on how prominent and how transformed each sample is, and a share card to brag with.

Astro · TypeScript · YouTube IFrame API

In final QA — playable here soon
Traced — what if every person alive traces back to one family?

WEB APP · 2026

Traced

Find your branch in the oldest family tree on record. Answer a short questionnaire — or bring your DNA results — and trace your line back through recorded history.

React · Vite · Vercel

Live — custom domain coming

Play

Sunset over the Pacific Vivid sunset sky Warm dusk light on the water Dusk seascape, golden hour Dolphin in the ocean Calm water at dusk Ocean sunset, Southern California Dusk colors on the horizon Wide dusk panorama Sunset glow on the horizon

Let's talk.

Marketing systems, AI workflows, or a good conversation about the frontier — email is the fastest way to reach me.

jpgumbayan@gmail.com LinkedIn ↗