EITHAN TUYILINGIRE
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https://etservice.us/

I build software and hardware.

Cofounder and CEO of Rulix. Computational data science at Michigan
State. Whether a given week is code, circuits, or product depends on
what I am trying to build.

The starting condition is usually the same. The thing does not exist, or
it does and I will not pay for it.

NOW
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Updated July 2026
Building Rulix and learning how export-control teams research, review,
and document classification decisions.

SELECTED WORK
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Rulix  [Current, 2026]
An AI copilot that helps export-control professionals research
classifications, inspect regulatory support, and produce reviewable
documentation.
Proof: Built a working product and started its first university pilot.
https://etservice.us/work/rulix

Ghostpin  [Shipped, 300+ users, 2025]
A desktop iOS location simulator used by more than 300 developers and
testers working on GPS-based iPhone applications.
Proof: Shipped independently and grew to more than 300 users.
https://etservice.us/work/ghostpin

Okemos Solar Racing  [Team project, 2023-2026]
Electrical systems and ESP32-based CAN telemetry for a solar-powered
race car.
Proof: Contributed to the 2023 Classic Division-winning team and later
led its seven-person electrical group.
https://etservice.us/work/solar-racing

Custom DJ deck  [Work in progress, 2025-present]
A hand-built DJ controller that turned an attempt to save money into a
PCB-design education.
Proof: Three versions so far, and about 3x the cost of the deck I was
avoiding.
https://etservice.us/work/dj-deck

WEBSITES
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I built this site from scratch, server and all. I build them for other
people too, so get in touch if you want one.
https://etservice.us/contact

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