TerraWorks

Seoul · Software studio

Software isn’t built.
It’s grown.

TerraWorks designs and builds web and native applications. We don’t hand them over and walk away — keeping them improving for as long as they are used is part of the work.

Get in touch We reply within one business day

Fields
Web applications · Native applications · Platforms
Markets
South Korea · Japan · United States
Approach
Design through deployment and operation, in house

What we do

On the web when a browser fits, native when it has to run on the user’s own OS.

Web applications

From product sites to accounts, billing and admin tooling. Localization and accessibility go in from the first commit rather than being bolted on. Deployed to the edge, so it is fast wherever it is opened.

  • TypeScript
  • React
  • Next.js
  • Cloudflare
  • PostgreSQL

Native applications

For what a browser cannot do — local files, background execution, auto-update, OS notifications. We verify the build that actually gets installed, not just the source.

  • Electron
  • Node.js
  • Windows
  • macOS

Currently running

Not a list of what we made —
a list of what is still running.

Only the ones that are public.

Selfsosong2026–selfsosong.comFor tenants in Korea whose rental deposit was never returned: how to take the legal steps yourself.Built after going through it ourselves. Go Korea2026–go-korea.netA community for people moving to and living in Korea. Runs in English. Quake Korea2025–quake-korea.comA community for a classic FPS. We run four dedicated game servers ourselves.
Public-data tools (Japan)2024–lotto-japan.com·kitaichi-navi.com·kyotei-japan.com·baken-navi.comFour information sites that aggregate and compute from officially published data. Weekly aggregation runs as a batch job.

How we work

Less about what we build,
more about how we keep going.

We don’t build things that only work at home
Languages, time zones and payment methods bolted on afterwards are imitations of the real thing. Designing for several countries from the start changes the structure itself. We look at Korea, Japan and the United States together.
We don’t separate building from maintaining
Shipping is a waypoint, not the end. Maintenance is not what happens after development — it is development. No software is ever at 100%; it only gets closer than it was yesterday.
We build fast and check fast
Making the thing beats arguing about what it might do. We revise from what actually happened when it ran, and write down why the attempts that failed did. Remembering only what worked is how the same mistake comes back.

Contact

If there is something to talk about

A paragraph on what you are trying to build is enough.

hello@terraworks.dev

Company details

Legal name
TerraWorks (테라웍스)
Representative
YUNYOUNG JUNG
Business registration no.
453-02-03694
Email
hello@terraworks.dev