Background
ChargeHealth, a healthcare SaaS platform, faced performance issues as it scaled. Rambunct optimised AWS Lambda concurrency, Amazon DynamoDB, and workflows using AWS best practices, enabling faster, more reliable services and reducing infrastructure costs.
The Challenge
- Unpredictable cold starts that slowed real-time reward processing
- Throttling of DynamoDB during simultaneous healthcare facility access
- Inconsistent response times during peak usage
- Difficulty monitoring and optimising their serverless environment
- They needed a partner to diagnose bottlenecks, improve scalability, and stabilise performance.
Our Solution
- Lambda Tuning: Applied reserved and provisioned concurrency strategies to reduce cold starts.
- DynamoDB Auto-Scaling: Enabled custom Amazon CloudWatch metrics to allow dynamic throughput adjustments.
- Event-Driven Architecture: Implemented Amazon SQS, Amazon SNS, and Amazon EventBridge for decoupled processing.
- Observability: Deployed AWS X-Ray and CloudWatch dashboards to monitor performance and health.
The Result
The modernisation effort delivered substantial performance, cost, and reliability improvements critical for scalable and compliant operations.
- 75% reduction in cold starts – Faster app initialisation for improved user experience.
- 60% faster response times – Enhanced performance across key workflows.
- 40% cost optimisation – Lower infrastructure spend with efficient resource usage.
- 99.9% uptime and enhanced audit compliance – Reliable availability with robust monitoring and controls.
