The
Overview
A retail SaaS provider was trapped by outdated on-premise infrastructure. Wishtree partnered with them to execute a phased migration to AWS using a combination of rehosting and replatforming strategies.
Problem
Statement
The client’s on-premise systems were a competitive disadvantage. They needed to move to the cloud, but could not afford downtime or data loss.
Highlights
Zero disruption migration
100%
Data fidelity
42%
Lower cloud costs
99.99%
Uptime achieved
Autoscaling enabled
Modern SaaS foundation
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limited human input to optimize specific goals like pricing, forecast demand,
and detect fraud in real time.
About Client
A retail SaaS provider serving hundreds of merchants with mission-critical applications. Their on-premise infrastructure was aging, expensive to maintain, and unable to scale during peak shopping seasons.
- On-premise infrastructure had high total cost of ownership.
- Feature releases took months due to manual provisioning and testing.
- Peak shopping seasons caused performance degradation and near-miss outages.
- Scaling required purchasing hardware months in advance.
- Any migration risked downtime or data loss, unacceptable for customer-facing SaaS.
- Legacy architecture was not designed for cloud-native benefits like autoscaling.
- Designed a phased migration strategy combining rehosting (lift-and-shift) for stable components and replatforming for optimized performance.
- Executed migrations in waves, validating each phase before moving to the next.
- Implemented AWS infrastructure including EC2 for compute, RDS for managed databases, and S3 for scalable storage.
- Replatformed key components to take advantage of AWS managed services, reducing operational overhead.
- Configured autoscaling to handle demand spikes automatically without manual intervention.
- Built high-availability architecture across multiple availability zones for 99.99% uptime.
- Established continuous data replication during migration, ensuring 100% data fidelity with zero loss.
- Migration planning used data analysis to identify dependencies and sequence workloads for minimal risk.
- Autoscaling policies were tuned based on historical traffic patterns. This ensured seamless handling of peak seasons.
- Post-migration, continuous cost analysis identified further optimization opportunities.
Core Features
Phased migration strategy
Rehosting (Lift-and-Shift)
Replatforming
AWS foundation
Continuous data replication
Impact
- 100% data fidelity
- 42% lower cloud costs in the first quarter alone
- 99.99% uptime achieved
- Zero business disruption
- Autoscaling enabled
- Feature release cycles accelerated
- Hardware maintenance eliminated
- Modern foundation ready
Why Wishtree
Wishtree specializes in cloud migrations that deliver immediate cost savings and long-term value – with zero disruption to live business operations.
For this retail SaaS client, we:
- Migrated with 100% data fidelity and zero downtime
- Delivered 42% cost savings in the first quarter
- Enabled 99.99% uptime through high-availability architecture
- Built a modern foundation with autoscaling and managed services