Agent of User

Maximum Human Output Bandwidth

Last updated: February 11, 2020

Hi, I’m Helder S Ribeiro, aka @agentofuser.

I’m a software engineer and entrepreneur bootstrapping Keykapp—a programmable, predictive, on-screen keyboard for VR and brain-machine interfaces.


I consult as a technical writer and a web developer specializing in Gatsby/React and TypeScript. Feel free to get in touch at

Areas of interest

  • Accessibility
  • Privacy / Consent
  • The (D)Web Platform
  • Async/Offline Interaction Design
  • Formal Epistemology


I can be found around the internet at:

Helder S Ribeiro (@agentofuser)

Written by Helder S Ribeiro (@agentofuser) who lives and works on 🌎 Earth building useful things. You should follow him on Twitter