Full stack developer with 15+ years building products at startups and in open source — founder of JSON Resume, co-founder of cdnjs. These days I build agentic systems end to end: tool-calling copilots with LLM-as-judge gates, autonomous document pipelines on the Claude Agent SDK, a bitemporal knowledge substrate in Rust with Lean-verified invariants, and neural TTS/ASR for Aboriginal language revitalization. Also trained a GPT from scratch in TypeScript and Vulkan just to see how deep the rabbit hole goes. I ship fast and let user feedback steer.
Principal-level contract engineering, most recently owning the AI capability of an HR-tech SaaS end to end: the agentic layer of the product — an in-app copilot with tool-calling over live customer data, autonomous document-generation pipelines, and the server-side compute services underneath — while shipping across the full stack (PHP/GraphQL, React, Go gateway, edge services).
Tokenized is a Bitcoin wallet for issuing, managing and trading digital tokens. I built the frontend, shipped as an Electron app. The hard part: keys never leave the user's machine, so all transaction and contract signing happens locally — which meant getting key management and security right in the UI layer.
Blockbid is an Australian crypto currency exchange. I started off on the frontend but eventually became tech lead and worked on every moving piece of the exchange. I really enjoyed working with liquidity providers and connecting their platforms to help us achieve liquid markets.
Built a large React/Redux application that runs everywhere — web, iOS and Android — as a PWA wrapped in a thin React Native shell. One codebase, every platform.
Hired to take EFF's campaigning to the next level by building an action centre in Ruby on Rails. The action centre is built around some large open source tools that lower the barrier to entry when contacting congress.
Started off as a front end developer but took on the role of CTO in early 2013. The application frontend is built with Javascript and organized as a single page application that talks to a collection of Rails web servers which are connected to MongoDB.
Worked on many politically charged campaigns against mass surveillance. Not only technically challenging work but also a lot of networking and getting my hands dirty with politics. Our biggest campaign was "The Day We Fight Back."
I write tutorials and blog post regarding the popular Javascript framework Backbone.js. The tutorials cover a range of topics regarding front end development aimed at beginners, experts and anyone in between.
Ephox is a worldwide company who is heavily involved with the development of TinyMce and enterprise editors. My primary role included building front-end widgets and applications. Worked on a major product using Backbone.js as a base. Heavily involved in UI/UX design and wire-framing. Also spend a lot of time designing API specifications and documentation.
JSON Resume is the open standard for resumes as JSON. I founded it in 2014 and still run it. What started as a schema is now an ecosystem: a registry that renders any resume in 52 themes, AI job matching that embeds your resume and scores it against live Hacker News hiring posts, an in-browser editor, an MCP server that updates your resume while you code, and a Claude Code skill that interviews you and hunts for jobs on your behalf. The whole thing lives in one open source monorepo.
An evidence-first knowledge substrate for LLM-scale extraction: a bitemporal, paraconsistent claim store (Rust + Postgres) that keeps contradictory claims forever, anchors every claim to character-level source spans, and re-ranks by corroboration on an E0-E5 epistemic ladder instead of deleting on conflict.
The Tool Package Manager for AI Agents. An open-source registry and execution platform that automatically discovers, validates, and runs npm packages as AI agent tools via MCP, SDK, or CLI.
Self-evolving AI Discord bot with 80+ specialized tools, multi-database architecture, and autonomous development capabilities. Built with Vercel AI SDK, Discord.js, and Next.js.
From-scratch GPT training and inference system built in TypeScript with a hand-written C Vulkan addon for GPU compute. No PyTorch or TensorFlow — custom tensor backend, autograd, tokenizers, training loop, and inference engine.
AI coding validator with semantic guardrails. A development-time validator that lets AI agents write code freely while maintaining consistency through domain semantics and multi-layer validation.
Adversarial scientific-paper replication engine. Extracts a paper's claims into a statement graph, compiles them into typed replication units — metric recomputes, dataset integrity checks, equation checks, simulations — executes them, and emits verdicts: reproduced, contradicted, or fragile.
CLI that generates LLM-optimized variants of your functions, validates them for functional equivalence, and benchmarks them across providers. Published on npm as llm-benchmark.
Co-founded cdnjs, a free CDN for the JavaScript libraries Google's CDN didn't carry. Community-moderated and open source; we partnered with Cloudflare, who now runs the infrastructure.
Open-source language revitalization platform for Aboriginal Australian languages — dictionaries for dozens of languages, community voice recording, and a full speech/ML stack built with the community, not just for it.
For my work against mass surveillance and building out civic tools for digital democracy.
Thomas was hired as a lead developer and, upon the leaving of our co-founder took over as CTO of Earbits. Thomas is, hands down, one of those A Players you hear of companies dying to hire. He is incredibly smart, not just at code but about everything from classical music to Chinese language and culture. Thomas is great to work with and, as a well established contributor to open source projects and several successful ventures, commands the respect of engineers at all levels. I would suggest doing anything you can to have him on your team.— Joey Flores, Co-founder and CEO of Earbits, Inc.
I've had the great pleasure of working with Thomas for the past three years at Earbits, and on a few side projects. Two years ago our CTO left on a moment's notice, Thomas saved our company by quickly stepping up to fill this role. He has been with our company through thick and thin and made serious personal sacrifices in order to help the company during tough times. He is a phenomenal hacker and a true team player. Highly recommended!— Yotam Rosenbaum, SVP of Operations, Earbits, Inc.
Thomas is an extremely talented engineer with a very broad range of skills and experience. From being a thought leader in the front-end community via backbonetutorials.com and cdnjs.com, to designing and implementing the API for cdnjs.com, working with Thomas has been fantastic learning experience. Thomas is truly a full stack develop, and his work output is incredible. If there is any opportunity to work with Thomas, I take it. He is the definition of an A player.— Ryan Kirkman, Senior Software Engineer at Nerdwallet