Slotstream
Open sourceRun a 105 GB AI model on a Mac that can't hold it. A native Swift engine, with a private Mac app in development.
Carlos Galarza
Software engineer & AI researcher · Colombia
I build AI products and the systems behind them.
Right now, I'm building local AI that runs on hardware you own. I've shipped software since 2010 and led teams of 4–12.
Selected work
Stratas Assistant
Client workI built a chat interface over three trucking-industry data products for Randall Reilly.
db.md
Open sourceA database made of plain files, built for agents to read and maintain. An open format with a Rust toolkit.
Rewire
InteractiveTalk to a language model. Teach it something new. Take it apart and see what changes. Runs in your browser.
phone.md
PrototypeAn Android-based phone OS configured through a Markdown file. A working prototype on a Nothing Phone 3.
Sevra
WebsitesWebsites for local service businesses, built and maintained for you. Hosting and ongoing updates included.
What clients say
“Stop considering and work with Carlos. He’s been an incredible asset to my business, clear on strategy, excellent communicator, and the rare kind of builder who can actually ship. He led, contributed, and taught along the way, and brought real passion to every project.”
Will McLellarn
Founder, General Dev · Stanford alum
Our work on Stratas Assistant
“Highly recommend Carlos – he helped unblock me and gave me a path forward in my MVP with Bolt, and then he even provided suggestions for ways to streamline the process as I moved forward.”
Naveed Hedayati
Head of Product, Co-Intelligence Labs
A little background
I built a government-contract discovery SaaS with Go, React and Postgres, then helped move a video-communications product from Firebase to a production Node.js/Postgres backend at Tribe. My open-source work goes back to Blockly's zoom controls in 2015.
Earlier engineering workMore projects & guides (11)
VibeCraft
Retired2025–2026A complete computer for AI agents: dedicated machines where agents used real browsers, terminals, and filesystems.
Math a Server Can't See
Interactive2026Encrypt two numbers in your browser, compute on their ciphertexts in a separate worker, then decrypt the answer. Real fully homomorphic encryption with live metrics and the client/server roles made visible.
Zero to GPT-2
Guide2026An interactive walkthrough of GPT-2 from first principles. Built so I could finally understand transformers properly.
The Essence of GraphRAG
Guide2026A visual, interactive walkthrough of the core idea behind GraphRAG and why it works differently.
Aven
Desktop app2024Claude Computer Use as a desktop app. Built with Tauri and the Vercel AI SDK.
AI Therapist (ASMR)
Voice demo2024An AI therapist with a whispering voice. A demo using the OpenAI Realtime API, ElevenLabs, and Fal.ai.
Make Your Own JS Runtime
Tutorial2024How to build a JavaScript runtime on top of Deno Core and Rust.
Tauri + Deno PoC
Experiment2024Running multiple Deno tasks safely inside a Tauri app. Permissions, IO, and lifecycle.
CodePortal
Platform2024An earlier platform for building apps with natural language. Predates a lot of what's happening now.
Figma app for Linux
Side project2018–2023Unofficial Figma desktop app for Linux, with local font support. Built it because I needed it.
Blocklify
Library2015–2017JavaScript to Blockly blocks. Parses code and imports it into the visual block editor.
Work together
I help teams build AI products and fix failures in live agent workflows. We pick a measurable problem, implement the change and check whether it worked.