Ideas we wanted to exist. Our own products are where we put our thinking to work.
1.0 Operloom An extensible agent workbench connecting conversations, durable workflows, and controlled actions. Build agents that carry work beyond a chat window.
Explore Operloom In development Drillbit An interview-practice app for software engineers, being built around short questions on system design and engineering trade-offs.
Explore Drillbit From idea to launch. Shape the idea Work out who it’s for, what matters, and what to build first.
Build it Product design and engineering together, from the first prototype to a working product.
Launch it Positioning, a landing page, and content that makes the value clear.
Get it seen Content, creators, and distribution, then learning from how people respond.
Back to productsA little practice. An interview-practice app for software engineers, being built around short questions on system design and engineering trade-offs.
Drillbit is still being built. It isn’t available to use yet.
The person you talk to I’m David. t23 is where I build my own products, including Operloom and Drillbit, and take on select projects for other people.
We work directly together: deciding what matters, making it work, and finding the people it’s for.
Experience behind t23 Mastercard Full Stack and Data Pipeline I work on large applications at Mastercard, helping teams ship new features without losing sight of how the whole system fits together. A lot of that work is asking good questions, working through trade-offs, and collaborating across teams.
CERN · ATLAS Applied ML research Built a 1.2M-parameter Transformer classifier for rare Higgs signals, evaluated at 0.804 AUC and 0.705 F1.
View public record Back to productsAn agent workbench An extensible agent workbench connecting conversations, durable workflows, and controlled actions. Build agents that carry work beyond a chat window.
View on GitHub 
David Erwin The person behind t23 (opens in a new tab)