hjs.space

●~/about.md

whoami

Digital IC Design engineer with 20+ years of experience — design, verification,

scripting, automation, LEC, LINT, SYN. Open to work in Japan/Singapore.

Off the clock I run a home network that's grown well past reasonable size:

a GB10 AI box, a mesh of UniFi and AmpliFi gear, three cameras streaming live,

and a small fleet of always-on services that occasionally page me at 2am.

●~/projects/

ls -la

Solar System — real-time 3Dlive

Sun, 8 planets, Pluto, and Luna, positions computed live from orbital mechanics — zoomable, 23 languages

solarsystem.hjs.space

JP exit for one PS5done

per-device gateway + Xray split-routing, OTT-only allowlist

ArchiSteamFarm, 15 accountslive

migrated off a dying 1GB VPS onto a NAS Docker container

3-camera live pipelinelive

go2rtc + ffmpeg to rotating YouTube broadcasts, self-healing on a cron

GB10 agent benchactive

local Ollama + OpenHands vs. Claude Code / Codex, head to head

●~/notes/

The mesh point that forgot it was a mesh point

2026-07-12

A firmware upgrade orphaned one half of a two-node AmpliFi mesh — the master jumped versions, the satellite didn’t, and the pairing quietly broke. Spent longer than I’d like to admit assuming the wrong device was the master before actually checking. Once both were back on the same firmware, re-pairing through the app took thirty seconds.

Six meters of open air, and why that's the easy part

2026-07-11

Planning a WiFi bridge between two balconies, two floors apart. The free-space path loss for six meters is trivial — maybe 40dB, nothing a normal access point can’t handle. The actual problem is that most omnidirectional antennas are weakest exactly straight down, which is almost exactly the angle this link needs. Math was never the hard part.

Migrating 15 Steam bots off a box that couldn't breathe

2026-07-10

A 1GB VPS finally gave up trying to keep 15 sessions alive at once — constant reconnect churn, memory pressure, the works. Docker on the NAS didn’t blink taking over the whole fleet. Three accounts needed a fresh 2FA code to log back in; the rest just picked up where they left off.

●~/links.txt

cat links.txt

E-mail Me

Résumé

●~/promos.txt

cat promos.txt

●~/contact

get in touch

Email

[email protected]

Role

Digital IC Design Engineer · Homelab Operator

●~/gpg-key.asc

encrypt a message to me

Fingerprint

0AF7 91CE BD49 4959 432D D6CB 4D97 E434 FE15 1D42

Key ID

4D97 E434 FE15 1D42

Download

hjs-space-gpg.asc

Solar System — real-time 3Dlive

JP exit for one PS5done

ArchiSteamFarm, 15 accountslive

3-camera live pipelinelive

GB10 agent benchactive

The mesh point that forgot it was a mesh point

Six meters of open air, and why that's the easy part

Migrating 15 Steam bots off a box that couldn't breathe

Typeless — AI voice dictation$5 Pro credit

Klook — travel activities & experiencesNT$100 signup credit

giffgaff — free UK SIM card£5 credit

Google Fi Wireless — mobile carrier$60 credit

UptimeRobot — uptime monitoringFree monitoring