ColbyCallahan
Selected Work

What I'm Building

Projects and domains across secure AI systems, developer platforms, capital allocation, and frontier research.

Engineering

Agent Sandbox Architecture

Designed, built, and operating agent security infrastructure at Netflix.

Designed, architected, and implemented security infrastructure for long-running coding agents at Netflix — handling migrations, planning, analysis, refactoring, and code generation. Control plane and sandbox infrastructure involving network policy management and agent identity, now furthering development of sandboxes, observability, and management systems to prepare for a one million agent ecosystem.

Engineering

Autonomous Software Evolution

Thousands of agent-driven PRs shipped at Netflix with passing builds and validations.

Long-running coding agents that drive migrations, refactoring, and code generation at Netflix scale. Thousands of PRs shipped with passing builds and validations. Agent platform designed, architected, and implemented end-to-end.

Engineering

Platform Modernization

All-platform scope at Netflix: region expansion, migration automation, and capacity management.

Team scope spanning all platform at Netflix — region expansion, migration tooling and automation, scaling and capacity management with AWS. Designed and built infrastructure that helps one of the largest engineering organizations evolve codebases and platforms with less manual friction.

Capital

Capital & Real Estate

Disciplined capital allocation and real-world operations.

Commercial real estate syndication centered on long-term value creation. Structuring and operating investments with a focus on disciplined capital allocation, investor alignment, and execution in the real world.

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Research

Brain-Inspired AGI

Exploring intelligence through temporal memory, cortical columns, and local learning.

Research notes and experiments around temporal memory, HTM, cortical columns, sparse distributed representations, and online local learning. Interested in intelligence from first principles, not only scaling current paradigms.

Creative

Fiction

Sci-fi writing and speculative world-building.

Published author of Rebel Hearts Alien Skies, a sci-fi novel reflecting a long-running interest in imaginative world-building and speculative futures.

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Creative

Busy Beaver

Interactive explorations of foundational computer science.

Built from curiosity and a desire to teach and inspire. Hands-on, browser-based simulations — a Turing machine Busy Beaver visualization and an ALU binary adder built from logic gates. Abstract theory made tangible through direct manipulation and signal flow.

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Engineering

LazyFish

Privacy-first browser utilities — no uploads, no tracking.

Free tools I use every day, offered to the world with a privacy-first mindset and no intention of making money. File and media conversion, Base64 encoding, password generation, JSON schema building, MCP server scaffolding, and Claude Code skill/hook generation. Everything runs locally — no data ever leaves the device.

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Let's connect

Open to conversations about collaborations, speaking, investing, technical architecture, and writing.