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Gangnam Rabbit Inc.
Trusted since 1999 | Spring | C# | Flutter | CI/CD
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About Us
ABOUT US
Founded in 1999, Gangnam Rabbit Inc. has spent 27 years partnering with organizations across industries — from enterprise system design to mobile app development. We specialize in Spring-based large-scale backend systems, C#/.NET web and desktop applications, Flutter cross-platform mobile apps, and CI/CD pipeline construction with DevOps architecture design.
Enterprise System DesignCross-Platform DevelopmentDevOps Architecture
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Years of Experience
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Projects Completed
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Expert Domains
Years of Experience
소프트웨어 개발 경력
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Projects Completed
Enterprise System Design
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Expert Domains
Cross-Platform Development
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Tech Stack
TECH STACK
Spring
0%Enterprise microservice architecture design and implementation with Spring Boot, Spring Cloud, and Spring Security. Experience in handling large-scale traffic and stable system operations.
C# / .NET
0%Web and desktop application development with ASP.NET Core, WPF, and Blazor. Specializing in legacy system modernization and migration.
Flutter
0%Cross-platform mobile app development for iOS/Android with Flutter. Native-level performance with beautiful UI implementation.
CI/CD
0%Automated pipeline construction with Jenkins, GitLab CI, and GitHub Actions. Container orchestration with Kubernetes and Docker.
KubernetesDockerJenkinsAWSAzureGitPostgreSQLRedisKafkaTerraform
Services
SERVICES
01
Web Application Development
Design and build high-performance web applications based on Spring Boot and ASP.NET Core.
- REST API / GraphQL Design
- Microservice Architecture
- Real-time Data Processing
- Performance Optimization & Scaling
02
Mobile App Development
Develop for iOS/Android simultaneously with Flutter, delivering near-native performance and beautiful UI.
- Cross-platform Development
- Native Plugin Integration
- App Store Deployment Automation
- Push Notifications / Offline Support
03
System Architecture Design
Design reliable and scalable system architectures that handle large-scale traffic.
- Domain-Driven Design (DDD)
- Event-Driven Architecture
- CQRS / Event Sourcing
- Fault-Tolerant Design
04
CI/CD Pipeline Setup
Build fully automated pipelines from code commit to production deployment.
- Jenkins / GitLab CI / GitHub Actions
- Docker Containerization
- Kubernetes Orchestration
- Blue/Green & Canary Deployment
05
Cloud Infrastructure
Design and operate cloud-native infrastructure on AWS and Azure.
- Terraform / Pulumi IaC
- Serverless Architecture
- Monitoring & Alert Systems
- Cost Optimization Strategy
06
Legacy Modernization
Safely transform legacy monolithic systems into modern architectures.
- Incremental Migration Strategy
- Strangler Fig Pattern
- Data Migration
- Zero-Downtime Transition
History
HISTORY
2023 - Present
Cloud Native Architect
Designed and operated multi-cluster Kubernetes environments. Oversaw high-availability system architecture processing 100K+ payment transactions per second for fintech clients. Stabilized inter-service communication by introducing Istio service mesh.
KubernetesIstioSpring CloudAWSKafka
2020 - 2023
Principal Architect
Led monolith-to-microservice migration projects. Decomposed systems into 30+ microservices and reduced deployment cycles from monthly to 10× daily through CI/CD pipeline automation.
Spring CloudDockerJenkinsTerraform
2017 - 2020
Mobile Tech Lead
Led Flutter cross-platform mobile development teams. Simultaneously operated 10+ apps across e-commerce, healthcare, and education. Maintained an average App Store rating of 4.8.
FlutterDartFirebaseREST API
2013 - 2017
Senior Full-Stack Developer
Developed large-scale C#/.NET ERP systems and ASP.NET MVC web portals. Built WPF desktop management tools. Introduced code review culture and achieved 80% test coverage.
C#ASP.NET MVCWPFSQL ServerAzure
2008 - 2013
Full-Stack Developer
Developed Spring-based enterprise systems. Delivered multiple large-scale financial projects including core banking and insurance claims systems. Oracle/PostgreSQL database design and tuning.
SpringJavaOraclePostgreSQLMyBatis
2003 - 2008
Mid-Level Developer
Participated in numerous government and public sector SI projects. Built systems based on the e-Government Standard Framework. Developed large-scale batch data processing systems.
JavaStrutsOracleLinuxShell Script
1999 - 2003
Junior Developer
Started career with C/C++ embedded systems development. Transitioned to C# and Java web development. The foundational years of all-night coding sessions that built core engineering fundamentals.
C/C++C#JavaHTML/CSS
Philosophy
PHILOSOPHY
“Good code should be understandable not just by machines, but by people too. Good architecture is a structure that doesn't fear change.”
Design First
Always design the architecture before writing code. Without solid design, you cannot build scalable systems. We utilize various design techniques including UML, C4 Model, and Event Storming.
Automation Equals Quality
Automate repetitive tasks. Through CI/CD pipelines, test automation, and Infrastructure as Code (IaC), we minimize human errors and ensure consistent quality.
Pragmatic Tech Choices
Choose the most suitable technology for the project without being swayed by trends. This is the greatest lesson learned from watching countless technologies rise and fall over 27 years.
Security by Default
Security should be embedded in the design from the start, not added later. OWASP Top 10, Zero Trust Architecture, and Secure Coding are our fundamentals.
Testimonials
TESTIMONIALS
“With clear architecture design and meticulous technical leadership, we completed our microservice migration faster than expected. System stability improved dramatically.”
Jaehyun Kim
CTO
Fintech Startup A
“We commissioned a Flutter app, and both iOS and Android versions were delivered at native quality. The CI/CD setup made subsequent maintenance incredibly smooth.”
Sujin Lee
Product Manager
E-commerce Company B
“We needed to modernize a 10-year-old legacy ERP system. The migration was done incrementally without any service interruption. A truly reliable expert.”
Minho Park
Head of IT
Manufacturing Company C
“After setting up our Jenkins-based CI/CD pipeline, deployment time was reduced by 80%. From Kubernetes cluster setup to monitoring — everything was handled perfectly.”
Youngjae Choi
DevOps Team Lead
SaaS Platform D
“We received Spring Cloud MSA architecture consulting, and the practical solutions tailored to our team's situation were extremely helpful. Technical training was also provided.”
Jiyun Han
Development Lead
Healthcare Company E
“In our Azure cloud migration project, infrastructure was codified with Terraform, cutting costs by 40% while actually improving performance. Very satisfied with the results.”
Dohyun Jung
Infrastructure Manager
EdTech Platform F
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