Custom System Integration (SI)

Home › Business Areas › Custom System Integration (SI)

A 16-Year Proven End-to-End Partner,
from Consulting to Build and Operations

GowIT is an SI specialist that delivers complex requirements on time and within budget.
From custom system builds to post-launch operations and maintenance, we stay with you as a single, dedicated partner.
Service Overview

The Capability to Deliver Complex Requirements On Time and Within Budget

GowIT's SI service is an IT system integration service delivering custom system builds, process innovation, and stable information systems across industries. We deliver sustainable results through prioritizing what can be built within budget, validating realistic timelines, and planning ahead for operations.
Since 2010 — Over 16 years, we've built systems tailored to industry-specific requirements, backed by references across manufacturing, distribution, law, accounting, and more.
For Whom

Which Companies Need SI?

Four situations that call for a new system — which one sounds like your company?
Legacy Modernization
Companies Running Legacy Systems
That Need Digital Transformation (DX) Now
Companies that need to fully modernize legacy systems into modern cloud or web-based platforms — where aging systems are hurting productivity and maintenance costs keep climbing.
Customization Needed
Companies Where an Off-the-Shelf
Package Just Doesn't Fit
Companies that adopted a solution but need workarounds or further customization because it doesn't match their real-world workflow — where the system needs to reflect the company's own processes exactly.
Specialized Industries
Companies with Unique Business Logic in
Specialized Industries
Companies that need processes designed and built specifically around their industry — with complex regulatory requirements, unique approval structures, or workflows that generic packages can't handle.
System Integration
Companies Whose Systems
Don't Talk to Each Other
Companies that need system integration to unify scattered data and systems — where disconnected ERP, CRM, HR, and accounting systems cause duplicate work and errors.
Business Areas

SI Capabilities and Scope

From consulting analysis to build, stabilization, and operational readiness — delivered through a 6-step End-to-End process.
STEP 01
Current-State Assessment and Strategy Development
IT Consulting and Analysis
We analyze current business processes and systems to identify issues and improvement directions, then develop an IT implementation strategy aligned with the company's goals.
.
STEP 02
Architecture, Data, and UI Design
System Design
We design the overall system architecture, data flow, integration structure, and user-centered features and screens.
.
STEP 03
Business System Implementation
System Development
We develop web, mobile, and business systems and integrate them with existing systems to build something ready for immediate real-world use.
STEP 04
Data and System Integration
System Integration
We integrate scattered systems and data — ERP, CRM, accounting, HR, and more — unifying business workflows.
.
STEP 05
Go-Live, Testing, and Migration
Build and Stabilization
We deliver a stable operating environment through system go-live, data migration, user acceptance testing (UAT), and issue resolution.
.
STEP 06
Enhancement and Scalability
Operational Foundation and Expansion
Architecture designed with future feature expansion and cloud migration in mind, along with improved operational usability
Frontend Technology
We design and build user screens and business interfaces so employees can work intuitively and efficiently across a wide range of tasks.
Backend Technology
We implement business logic, data processing, database integration, and external system interfaces to build a stable, scalable system.
Why GowIT

What Sets GowIT Apart

Three factors that determine whether an SI project succeeds — GowIT considers all three together.

01

We Design the Build Scope Around Reasonable Cost
Rather than just saying "yes, it's possible," we spell out exactly what can be built first within budget. This approach genuinely helps companies evaluate return on investment.

02

We Review Schedule Feasibility First, Then Propose an Execution Plan
Rather than simply matching the client's desired delivery date, we provide a realistic schedule that reflects the scope of requirements and risk — critical for reducing the chance of delays.

03

We Consider Build and Operations Together, Not Separately
Instead of finishing at SI delivery, we take an approach that accounts for post-launch operations and maintenance from the start. This allows more flexible responses to the fixes and enhancements that come up once the system is in real-world use.
Technical Advantage

Our Technical Edge Over Competitors

More than technical skill — hands-on development expertise grounded in real workflows and industry knowledge
Broad Technical Coverage Across .NET and JAVA
We're not tied to a single technology — we design and develop systems across .NET, JAVA, and other stacks, widening the range of technical options to fit each client's existing IT environment.
Applied Experience Backed by References Across Industries
Our experience across manufacturing, distribution, law, accounting, and more goes beyond raw development skill. We propose build approaches that reflect not just the technology, but the workflows and industry-specific requirements.
A Practical Development Approach Built for Integration and Growth
Enterprise systems rarely run in isolation — they usually need to connect with existing ones. We deliver practical development that covers not just new builds, but integration with existing systems, gradual scaling, and operational stability.
Case Studies

Client Implementation Case Studies

Problem → Solution → Result — GowIT's SI track record, proven in the field
Professional Services/Accounting
Deloitte
Built an automated system for revenue planning, expense budgeting, and organization-wide performance monitoring
Implementation Solution
C#, ASP.NET, MSSQL, JavaScript, HTML/CSS, Reporting Module, IIS, Windows Server
Key Features/Achievements
Budget & Performance Management System
Shipping/Vessel Inspection
Korean Register (KR)
Analyzed compatibility and built a prototype to convert an existing WinForm-based inspection system into a responsive web system
Implementation Solution
C#, .NET Framework, MSSQL, HTML5, CSS3, JavaScript, IIS, Windows Server
Key Features/Achievements
Next-Generation Inspection System Prototype
Distribution/Consumer Goods
JTI
Built an online ordering system that unified head office, distribution, and field processes under a common standard, and linked it with legacy systems for accounting, sales, and master data
Implementation Solution
C#, ASP.NET, MSSQL, JavaScript, Interface API, Batch Process, Microsoft Azure
Key Features/Achievements
Online Order DSD Replacement
Global Manufacturing
Novelis China
Built an MDM platform to centrally manage materials, processes, and master data across a global manufacturing environment
Implementation Solution
Java, JavaScript, MSSQL, Tomcat, jQuery
Key Features/Achievements
MDM (Master Data Management)
Commerce/Print Services
Kinko’s Korea
A unified e-commerce platform combining a public online store and corporate store, implementing complex business logic for ordering, payment, and coupons/points
Implementation Solution
Java, Tomcat, Nginx, MariaDB, Linux
Key Features/Achievements
Integrated Commerce Platform (Online Store)
Public Sector/Cultural Content
Korean Film Archive (KOFA)
Built a media asset management system for video data management, film information, and public VOD services
Implementation Solution
Java, Tomcat, Nginx, Oracle, Windows Server, AWS Media Converter
Key Features/Achievements
Archival Media System (AMS)
Public Sector/Government
Ministry of Foreign Affairs
Built a work management portal for integrated management of overseas and domestic diplomatic affairs, supporting collaborative processes
Implementation Solution
Java, eGov, MyBatis, jQuery, Apache, JBOSS, Linux, Cubrid
Key Features/Achievements
Work Management Portal System
Research/Quality Management
KES and 5 Other Companies
Built a laboratory information management system to centrally manage experiment/test data and quality history
Implementation Solution
C#, ASP.NET, MSSQL, JavaScript, HTML/CSS, Reporting Module, IIS, Windows Server
Key Features/Achievements
LIMS (Laboratory Information Management System)
Project/Schedule Management
Hyundai Mobis and 5 Other Companies
Built a project management system to centrally manage project schedules, staffing, and task progress
Implementation Solution
C#, ASP.NET, MSSQL, JavaScript, HTML/CSS, Reporting Module, IIS, Windows Server
Key Features/Achievements
PMS (Project Management System)
FAQ

Frequently Asked Questions

Yes. Our SI service starts by organizing your requirements, separating must-have from optional features, and designing the build scope to fit within a reasonable budget. Rather than building everything at once, we can also implement high-priority features first, in phases.

It depends on the scope and complexity of requirements, but during the initial analysis phase we review the schedule estimate and risk factors together to propose a realistic delivery timeline. What matters most is a workable plan that balances requirements and schedule, rather than an overpromised deadline.

GowIT can build systems across a range of technology stacks, including .NET and JAVA. We select and design the technical approach that best fits your environment — whether that’s integrating with existing systems, building new ones, or expanding features.

Yes. In most enterprise environments, a new system rarely runs on its own — data integration with existing systems matters just as much. GowIT has extensive experience building interfaces and integrations with ERP, groupware, MES, accounting systems, and more.

Yes. Considering the impact on your operations, we can support running the new system alongside the existing one, or transitioning only specific areas in phases.

Yes. After SI delivery, our SM service can continue with incident response, feature improvements, operational support, and stabilization. In other words, we offer a management structure that extends beyond the build phase into ongoing operations.

Once an incident is reported, we follow an operational process through root-cause analysis, remediation, and result reporting. We prioritize based on severity and business impact to maintain operational stability.

Yes. Depending on your operating environment and security policy, we can build on-premise, in the cloud, or in a hybrid structure. We also design architecture with future scalability and operational efficiency in mind.

Yes. Through responsive web or mobile-aware UI/UX design, the system can be used on tablets and mobile devices, not just PCs.

The key criterion is experience building systems for similar workflows and industries. GowIT draws on references across manufacturing, distribution, law, accounting, and more, with experience building systems tailored to each industry’s requirements and operating practices.

Yes. When business needs change or new requirements emerge during operation, we support phased feature improvements and system upgrades. We also prioritize designing for future scalability from the initial build.

Yes. We design with the security elements operations require — user permission management, access control, log management, and more. We also run functional testing, user acceptance testing (UAT), and stabilization checks to ensure thorough validation before going live.

Talk to an SI Expert

Tell us about your requirements, and we'll recommend the right approach.
Related solutions