Tom
Callaghan

Software developer, founder and indie hacker.

I run Gradient3, build software for other people and spend a lot of my time working on products of my own.

Tom Callaghan in a relaxed restaurant setting
What I’m building

What I’m building

Two marketplaces I’m currently putting most of my energy into.

In development

AgentDeploy

A marketplace for discovering, using and distributing AI agents.

Building the infrastructure around how useful agents are found, evaluated and put to work.

  • AI agents
  • Marketplace
  • Founder-built
Visit AgentDeploy
AgentDeploy marketplace landing page
In development

QuoteCaddy

A marketplace designed around the way the construction industry actually works.

Software meets concrete: a focused product for the real workflows behind construction quoting.

  • Construction
  • Marketplace
  • Founder-built
Visit QuoteCaddy
QuoteCaddy construction quoting workspace

Gradient3 is my independent software studio.

I work directly on everything—from early product thinking to the software people actually use.

  • SoftwareWeb apps, SaaS products, marketplaces and internal tools.
  • AI integrationAgents, language models and workflow automation where they’re genuinely useful.
  • Product engineeringTaking an idea from an early prototype to a working product.
Visit Gradient3

A little outside the laptop.

Software isn’t the entire story. I travel whenever I can, box, play padel, experiment with health and performance, and spend an unreasonable amount of time listening to electronic music.

Tom standing in front of the Great Sphinx of Giza
Tom with a bicycle beside a bronze cyclist statue in Cork city
Tom at a snowy mountain viewpoint at sunset

Let’s build something together

If you’re working on something interesting, tell me about it.

Get in Touch