CALEB CARMICHAEL

Senior Backend & Blockchain Engineer - 12+ years

I build backends and smart contracts in TypeScript, Node.js, and Solidity.

Now: blockchain trading systems and AI coding evaluations.

GitHub stats | Blockchain stats

20+ contracts
built and reviewed at Fei
83 pull requests
merged at Fei
$3.5B
Fei assets at peak
410k+ transactions
sent by Tarkin

Selected work

02 / Tarkin / Independent / Retired

Node.js · Solidity · Trading

A trading bot with 410,000+ transactions.

Built a trading bot that simulated trades before submitting them on BNB Chain and Polygon. Handled smart contracts, wallets, transaction signing, monitoring, and alerts.

~5,000 transaction variants simulated per second.

03 / Votre / Collar Networks / 2023–2024

Solidity · TypeScript · Lending

Built a blockchain lending platform.

Sole engineer responsible for the smart contracts, TypeScript integrations, and tests. Part of a16z CSX Spring 2024.

04 / Arboreum / 2019–2020

Ethereum · Carbon credits

An Ethereum marketplace for carbon credits.

Led development of the smart contracts and tools to verify, tokenize, and trade carbon credits.

05 / Hypernet Labs / 2020–2021

Solidity · Node.js · Payments

Crypto payments for cloud computing.

Built smart contracts and a Node.js backend for usage-based and subscription payments, using Connext payment channels.

06 / Meta Archive Explorer / Independent / 2026

FastAPI · SQLite · Alembic · LanceDB

Making Facebook exports useful.

Meta's downloads are fragmented and hard to explore. I designed a dashboard anyone can use to search messages, browse media, and understand their history on their own computer. Used with 1.3M+ messages across 40+ GiB.

07 / AI tools and evaluations / Current

AI evaluation · Code review · Developer tools

Testing AI coding tools.

I write coding challenges, tests, and reference solutions to evaluate AI models. Side projects include Spearbot for Solidity security reviews and Codex Repo Template for coding agents.

Open source

Experience

2026–now

DataAnnotation + other platformsLLM evaluation engineer

2023–now

Segfault SecurityIndependent software engineer

2023–2024

Votre / Collar NetworksFounding engineer

2021–2022

Fei LabsFounding engineer, Solidity & security

2020–2021

Hypernet LabsLead Solidity engineer

2017–2020

EarlierArboreum, Rising Line / Zethr, Nead Werx

Contact

GitHub, LinkedIn, Email, Phone, Resume (PDF)