Computer Systems Design and Integration

Dependable systems,
designed and run
end to end.

design. build. integrate.

YEJINC is a systems design and integration studio. We plan, build, and maintain the software and infrastructure that growing businesses depend on every day, from cloud platforms and data pipelines to the internal tools your team opens first each morning. Every engagement starts with a clear scope and ends with a system your team can run with confidence.

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We build dependable systems that help growing businesses ship faster, scale without friction, and stay online around the clock.

What our stack does in practice

A look at the capabilities we deploy on every engagement, written the way we like to think about them — as commands that run cleanly, in order.

yejinc@deploy: ~

[ok] Build pipelines — automated delivery for web and data systems

[ok] Cloud integration — connect services across providers

[ok] Data services — storage, processing, and reporting

[ok] 24-7 monitoring — watch systems around the clock

[ok] Deploy targets — staging and production environments

The window above is not a metaphor. It is the shape of the work we do: predictable commands that run cleanly, in order, and leave your system in a known good state after every release.

Capabilities at a glance

How our team spends its time across the core disciplines that make a system dependable in production. These figures shift with each project, but they show where our engineers concentrate their attention year over year.

Systems Design 98%
Cloud Integration 94%
Data Services 91%
Support 99%

Selected work

A few of the systems we have designed and integrated for teams across retail, logistics, and finance. Each one started as a conversation and ended as software our clients rely on every single day.

Atlas Retail Platform

Retail and Ecommerce

A unified order and inventory system connecting three warehouses and two storefronts in a single dashboard.

WEB

Northwind Logistics

Transportation and Freight

Cloud migration and realtime tracking for a national carrier fleet operating across six regions.

CLOUD

Meridian Analytics

Financial Services

A secure reporting and data platform that turns raw records into daily insight for leadership teams.

DATA

Common questions

Straight answers to the questions we hear most often before a project begins.

We provide computer systems design and integration services. That covers planning software architecture, building web and internal applications, connecting cloud services, setting up data pipelines, and running ongoing support and monitoring once a system is live.

Small integrations often ship in four to six weeks. Larger systems with multiple services and a data layer typically run between two and four months. We agree on a clear timeline and milestones before any work begins, so you always know what to expect.

We scope each engagement first, then quote a fixed or milestone based price. There are no hidden line items. You receive a written estimate that lists the deliverables, the timeline, and the assumptions behind the number before you commit.

Every system we build comes with a support window, and most clients keep us on a monthly plan that includes monitoring, security updates, and small improvements. Our monitoring runs around the clock so issues are caught before your users notice them.

We treat your data as confidential and follow strict access controls, encryption, and retention rules. You can read the full detail on our Privacy Policy page, which explains exactly what we collect, how we use it, and the rights you hold.

Yes. Most of our engagements begin by integrating with what you already run. We assess your current setup, identify what should stay, and design new pieces around it so nothing valuable is thrown away.

Ready to ship your next system?

Tell us what you are building and we will map the fastest dependable path to production.

Start a project