I’m a full-stack and backend engineer with 5+ years of experience who likes building the product, the services behind it, and the tests that show they work.
At Mekari, I worked on a Ruby-to-Go migration and fixed race conditions that cut system escalations by 90%. More recently, I’ve audited 800+ coding-agent benchmark tasks at AfterQuery (YC W25) and built open-source AI evaluation tools, including one that flagged defects in 5 of 25 SWE-bench Verified tasks.
I’m also interested in Rust and trading systems. I built an in-memory order book in Rust with a ~104 ns matching hot path, and used Python to research BTC funding-rate signals.
Open to full-stack, backend, Rust, AI engineering, and quant engineering or trading-systems roles.
Remote: Yes, worldwide
Willing to relocate: Yes, with visa sponsorship
Technologies: TypeScript/JavaScript, Go, Ruby, Python, Rust; React, Next.js, Node.js, Rails, LangGraph; PostgreSQL, MySQL, Redis, Elasticsearch; Docker, AWS; LLM evaluation, multi-agent systems, backtesting
Résumé/CV: https://farrellh.dev
GitHub: https://github.com/farrellh1
Email: [email protected]
Linkedin: https://www.linkedin.com/in/farrellh/
Upwork: https://www.upwork.com/freelancers/~0161da64636535cc02
I’m a full-stack and backend engineer with 5+ years of experience who likes building the product, the services behind it, and the tests that show they work.
At Mekari, I worked on a Ruby-to-Go migration and fixed race conditions that cut system escalations by 90%. More recently, I’ve audited 800+ coding-agent benchmark tasks at AfterQuery (YC W25) and built open-source AI evaluation tools, including one that flagged defects in 5 of 25 SWE-bench Verified tasks.
I’m also interested in Rust and trading systems. I built an in-memory order book in Rust with a ~104 ns matching hot path, and used Python to research BTC funding-rate signals.
Open to full-stack, backend, Rust, AI engineering, and quant engineering or trading-systems roles.