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Parker Rex

Austin, TX | Founder, Little Worker | Product Engineer

I'm building Little Worker — a simple work surface backed by Grok, ChatGPT, Claude, and managed models.

It feels as simple as a task list. Underneath are Workers, tools and plugins, training, permissions, approvals, spend limits, evidence, receipts, billing, and durable work state.

I use it to win and deliver real client work. Then I share what I learn in public.

What I do

  • Turn unclear product problems into shipped software.
  • Build production AI workflows with review, proof, and cost controls.
  • Take one hands-on client build at a time.

Proof

  • Led product at Delivery Dudes to $73M in annual GMV and a $23M acquisition.
  • Built GPTs for Devs, reaching 100K visits.
  • Grew Vibe with AI to $6K MRR.
  • Published 160+ long-form videos across two channels with about 290K public views.
  • Shipped web, mobile, AI, developer, and native software.

Selected builds

  • Ship by Sunday — product truth, code generation, local workers, billing, and proof.
  • MAP — web, iPhone, health data, calendar, tasks, notes, goals, and AI.
  • VAI Forums — the full community product behind Vibe with AI.
  • Synthia — a native C++ audio instrument tested in Ableton.
  • AI-SDLC — an open-source AI development CLI with 186 stars and 47 forks.
  • Deep Research — a human-reviewed AI research system built for a client.

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