Case Study: Migrating a Jakarta Retailer’s Legacy Systems to AWS – Key Lessons on Cost, Downtime, and Compliance

When a mid‑size retailer in Jakarta decided to modernize its aging on‑premise infrastructure, the goal was clear: cut operating expenses, eliminate frequent service interruptions, and meet Indonesia’s tightening data‑privacy regulations. This case study walks through the migration journey, the tactics that delivered measurable results, and the lessons other Indonesian businesses can apply.

Background and Business Drivers

The retailer operated a mix of legacy point‑of‑sale (POS) systems, inventory management, and e‑commerce platforms on a traditional data center. Annual IT spend exceeded US$1.2 million, and unplanned outages caused revenue losses estimated at US$150 k per year. Additionally, the company faced compliance gaps with Indonesia’s Personal Data Protection regulations.

Migration Strategy

1. Assessment and Planning

• Performed a thorough inventory of applications, dependencies, and data flows.
• Classified workloads into three categories: lift‑and‑shift, re‑platform, and retire.
• Estimated cost differences using the AWS Pricing Calculator.

2. Choosing the Right AWS Services

• Amazon EC2 for legacy workloads that required minimal code changes.
• AWS RDS for the relational database tier, providing automated backups and encryption.
• AWS Lambda for event‑driven integration between POS and inventory.
• AWS CloudTrail and Config for continuous compliance monitoring.

3. Execution Phases

• Pilot Migration: Moved a non‑critical reporting service to test networking, IAM roles, and monitoring.
• Incremental Cut‑over: Shifted POS terminals one store at a time during low‑traffic windows, using AWS Direct Connect for low‑latency links.
• Full Decommission: Shut down on‑premise servers after verifying data integrity and performance benchmarks.

Outcomes

• Cost Savings: Operating expenses dropped by 38 % within the first year, thanks to pay‑as‑you‑go pricing and reduced hardware maintenance.
• Downtime Reduction: Unplanned outages fell from an average of 12 hours per month to under 30 minutes, achieved through auto‑scaling groups and multi‑AZ deployments.
• Compliance Achievement: All customer data is now encrypted at rest and in transit, with audit logs stored in AWS CloudTrail, satisfying the latest Indonesian data‑privacy mandates.

Key Lessons Learned

Plan for incremental migration. Shifting workloads in small, controlled batches minimized risk and kept the business running.

Leverage native AWS tools for compliance. Built‑in services like AWS Config eliminated the need for third‑party monitoring solutions.

Invest in staff training. Upskilling the internal IT team on AWS best practices accelerated post‑migration optimization.

How Baledev Indonesia Can Help

Baledev Indonesia specializes in end‑to‑end cloud migration services across Indonesia, with proven expertise in moving legacy retail systems to AWS. Our team conducts a comprehensive readiness assessment, designs a migration roadmap tailored to your business priorities, and executes the transition using proven methodologies that keep costs low and downtime near zero. We also ensure your new environment complies with local regulations through automated security and audit controls.

Ready to transform your IT landscape and reap the benefits of cloud agility? Contact Baledev Indonesia today for a free consultation and discover how we can guide your migration journey.