Caleb Ditchfield | Software Engineer
Software engineer since 2017, mostly in TypeScript, Node.js, and Solidity. I build backend systems, security-critical software, developer tooling, and (many) side projects as ideas hit me.
Current work: AI (LLM) coding challenge & evals, reference solutions for flagship LLM agents, and HFT arbitrage on EVM blockchains.
Selected work
Fei Protocol
Core contracts, TypeScript tooling, governance, deployment, CI, monitoring, and incident response. The public record includes 83 merged PRs.
Tarkin
A generalized EVM frontrunner built in TypeScript and Solidity. It ingested live mempool events, generated candidate transactions, and ran deterministic simulations across local nodes and eight workers, with local IPC and onchain profitability guards.
Spearbot
Early TypeScript/LLM pipeline for hierarchical code summaries, HNSW retrieval, and repeatable Solidity audit analysis, backed by offline fixtures.
Collar Protocol
Founding engineer for a novel lending mechanism; owned its architecture, contracts, integrations, and tests through a16z CSX Spring 2024.
Meta Archive Explorer
Local-first personal data infrastructure for ingesting, reconciling, searching, and exploring a 40+ GiB Facebook export with full source provenance.
Open source
- Hexagons Bestagons Backend-authoritative 60 Hz TypeScript game simulation.
- Monitor WSL/Windows CLI for capturing and summarizing desktop activity.
- Codex Repo Template Versioned repository context and coding-agent workflows.
Experience
DataAnnotation + other platformsLLM evaluation engineer
Segfault SecurityIndependent software engineer
Votre / Collar NetworksFounding engineer
Fei LabsFounding engineer, Solidity & security
Hypernet LabsLead Solidity engineer
EarlierArboreum, Rising Line / Zethr, Nead Werx