My Experience Migrating Enterprise Apps to AWS

Migrating enterprise applications to the cloud isn't just a buzzword — it's a real challenge with real impact.

In this post, I’ll share my experience leading the migration of Samsung's KSCB (Knox Samsung Care for Business) backend application to the cloud, including both AWS and Azure. We used technologies like Spring Boot, Docker, and Kubernetes (EKS) to modernize the stack and make it scalable.

🧠 Why Migrate?

The primary goals were:

• Reduce operational cost by moving off aging EC2-based infrastructure


• Improve scalability for global business use cases


• Enable multi-cloud deployment for better resilience and flexibility


• Containerize the existing monolithic app to support CI/CD workflows

⚙️ What We Migrated

We started with a Spring Boot backend running on AWS EC2 and PostgreSQL, with many tightly coupled services.

Over time, we:

• 
  Dockerized the app


• Switched to Kubernetes (EKS) for orchestration


• Externalized configurations with AWS Systems Manager
  


• Set up CI/CD using GitHub Actions and Helm charts
  


• Added Azure compatibility for multi-cloud deployments

🔑 Key Lessons Learned

✅ Automate Early


Don’t wait until late in the migration to introduce automation. From builds to deployment, automation saved us hours of manual work.

✅ Watch for Hidden Costs


Cloud billing surprises are real. Monitor early, and optimize compute + storage usage.

✅ Plan Rollback Strategies


Always assume something will fail. We created blue-green deployment paths and rollback scripts just in case.

✅ Centralized Logging & Monitoring


Invest in centralized logging (like ELK or CloudWatch) early — it’ll save debugging time later.

✅ Involve Security Teams Early


Cloud-native setups often skip security best practices. Set up IAM policies, VPC rules, and encryption upfront.

🚀 Final Thoughts

Cloud migration is not just about moving code — it’s a culture and architecture shift. It taught me a lot about scalability, automation, and working across dev, infra, and security teams.

If you're planning a migration or facing a similar challenge, feel free to connect or reach out!


You can find me at linkedin.com/in/punitdimrii

🛠️ Tech Used: Spring Boot, Docker, AWS EKS, Helm, GitHub Actions, PostgreSQL, Azure