The Challenge
A 3-year-old fintech app was running on a single monolithic server in a Lagos data centre — a single point of failure handling thousands of daily transactions. Infrastructure costs were ballooning, deployment took 4 hours of manual effort, and any spike in traffic caused outages.
The Solution
Designed and executed a full migration to AWS using a strangler-fig pattern — incrementally replacing the monolith with containerised microservices deployed on EKS. Used Terraform for all infrastructure-as-code, GitHub Actions for CI/CD, and RDS for managed databases with automatic failover.
🎯 Primary Goal
Eliminate manual bottlenecks and create a scalable, automated workflow that runs reliably without constant oversight.
⚡ Key Constraint
Implementation had to happen without disrupting ongoing operations — a zero-downtime, iterative approach was essential.
The Outcome
Zero downtime migration completed over 10 weeks. Infrastructure costs dropped 60% through right-sizing and reserved instances. Deployment time went from 4 hours to 12 minutes. The team can now push 3x per day vs once per week.
"The cloud migration was seamless. Zero downtime, 60% cost reduction, and our team can now scale infrastructure in minutes. Ademola knows exactly what he's doing at every step."
— Marcus Klein, CTO
Technical Implementation
The solution was built using a modular architecture ensuring each component could be tested, updated, and scaled independently. Key technical decisions included:
- Webhook-first design to ensure real-time data flow with no polling delays
- Error handling and retry logic at every integration point
- Comprehensive logging and monitoring for immediate issue detection
- Documentation and training sessions to ensure client team independence