Systems builder across silicon, cloud, protocols, and AI.
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I have spent 20+ years building software close to the metal and close to users: embedded Linux, device platforms, cloud infrastructure, blockchain protocols, AI data systems, and the developer tools around them.
The environments have changed. The craft has not: understand the system, find the bottleneck, build the smallest reliable abstraction, ship it, and keep it operable.
I am especially drawn to the founding-engineer version of that craft: taking ambiguous technical ideas from first principles into working systems, small teams, and shipped products. I have done that as a 2x founding engineer, helping take products and platforms from scratch to public launch, after years inside large engineering organizations across semiconductors, devices, and cloud infrastructure.
- Embedded and platform systems: Linux kernels, device platforms, OS delivery, build systems, and release machinery.
- Cloud infrastructure: storage, virtualization, operational excellence, and infrastructure teams.
- Blockchain protocols: consensus, networking, validator operations, protocol tooling, and developer surfaces.
- AI-native products: agent workflows, data pipelines, user-owned data infrastructure, and productized engineering systems.
- Engineering leadership: hiring, roadmap discipline, launch execution, and turning ambiguous technical ideas into teams and products.
Not a complete portfolio. Just a few public traces of the layers I have spent time in.
| Layer | Public traces |
|---|---|
| Kernel / embedded | Linux ARM maintainer history, semiconductor-era platform work, wmic, harmony-arm. |
| Protocol / infra | story-contract-tool, ansible, go-aws. |
| Agent workflows | claude-skills, public experiments around agent-native development and local automation. |
| Personal apps | HarmonIQ, blood-analyzer, leohchen.github.io. |
| Repository | Why it is here |
|---|---|
| HarmonIQ | A retro Winamp-flavored local music player for owned MP3/CD libraries, built in Swift. |
| claude-skills | Personal agent skills and workflow automation experiments. |
| story-contract-tool | A Go CLI for interacting with smart contracts on Story. |
| harmony-arm | Public Harmony-on-ARM work from the protocol infrastructure era. |
| ansible | Ansible scripts for Harmony node and network operations. |
| blood-analyzer | OCR extraction and health-data visualization with a Grafana-style workflow. |
| wmic | A small Go wrapper around the WMI command-line utility. |
| leohchen.github.io | Personal site and writing surface. |
A lot of the deeper systems work sits in organization or private repositories. This page is the public trail: old patches, small tools, current experiments, and the technical corners I keep returning to.