Farrell Hauzan
Full-stack engineer. AI products on a backend & Web3 foundation: TypeScript, Python, Go, Rust, Solidity.
Based in Jakarta. Reviewing tasks that train and evaluate AI coding agents at AfterQuery Experts (YC W25). Previously at Mekari. Top Rated Plus on Upwork.
Now
- Reviewing tasks that train and evaluate AI coding agents at AfterQuery Experts (YC W25)
- Top Rated Plus on Upwork
- Reading, learning AI agents and evals
- Jakarta
Selected projects
- gatekeepmulti-agent GitHub App that flags low-effort and AI-generated PRs with grounded evidence
- eval-harnessagent eval harness that audits SWE-bench Verified itself
- evalpreval-graded AI code review, shipped as a GitHub Action
- smart-contract-auditor-skillchecklist-driven Solidity audits for Claude Code
- iron_cacheRedis-like KV store in Rust
- order-book-rslow-latency matching engine in Rust
Experience
- AfterQuery ExpertsAI Evaluation Engineer2025 — now
- MekariSoftware Engineer2024 — 2025
Migrated core backend from Ruby monolith to Go microservices for 15,000+ active businesses.
- Happy5Backend Engineer2022 — 2024
- ITHO IndostockBackend & Flutter Developer2022