Jakarta Retailer’s AWS Migration: Cost Savings, Downtime Cuts, and Compliance Insights

Overview

A mid‑size fashion retailer in Jakarta operated a fragmented on‑premises data centre for over a decade. Growing e‑commerce demand and tighter data‑privacy regulations prompted the leadership to consider a cloud migration.

Key Challenges

• Legacy architecture: Monolithic applications built on outdated Java EE stacks.
• Cost pressure: High capital expenditures for hardware refresh cycles.
• Regulatory compliance: Need to meet Indonesia’s Personal Data Protection regulations.
• Business continuity: Minimal downtime was essential during peak shopping seasons.

Migration Approach

The retailer partnered with an experienced cloud services firm to adopt a phased lift‑and‑shift strategy, followed by selective refactoring. Core steps included:

1. Inventory and dependency mapping of all workloads.
2. Design of a target AWS landing zone aligned with ISO 27001 controls.
3. Migration of non‑critical workloads to Amazon EC2 using AWS Server Migration Service.
4. Implementation of Amazon RDS for database modernization.
5. Post‑migration performance tuning and cost‑optimization using AWS Trusted Advisor.

Lessons Learned

Cost Savings

By moving to a pay‑as‑you‑go model, the retailer reduced its infrastructure spend by roughly 30 % in the first six months. Rightsizing instances and leveraging Reserved Instances for steady‑state workloads contributed to predictable budgeting.

Downtime Reduction

The phased approach allowed the business to keep legacy systems online while new environments were validated. As a result, the migration window was limited to two weekend periods, each with less than four hours of total service interruption—a 70 % improvement compared to the initial estimate.

Compliance

Deploying the AWS landing zone with built‑in encryption (KMS) and audit logging (CloudTrail) satisfied the data‑privacy requirements. Regular compliance scans using AWS Config Rules ensured continuous adherence to Indonesian regulations.

Recommendations for Indonesian Enterprises

• Start with a detailed workload inventory to avoid surprise dependencies.
• Adopt a landing zone that incorporates local compliance controls from day one.
• Use a hybrid migration window to maintain business continuity during peak periods.
• Engage a partner with proven AWS migration experience in the Indonesian market.