70% Cost Reduction
How a Series A FinTech Cut Its AWS Bill by 70%
A Series A fintech was burning $40K/month on AWS with no visibility into waste. We cut it to $12K in eight weeks.
The Challenge
A Series A fintech startup was burning $40,000/month on AWS with no visibility into where the spend was going. EC2 instances were consistently over-provisioned, idle resources were never cleaned up, and there was no tagging strategy to track costs by team or service. Engineering leadership knew they were wasting money but lacked the tooling and expertise to quantify or fix it.
The Approach
We started with a comprehensive AWS Cost Explorer analysis and Trusted Advisor review to identify the biggest waste areas. The primary opportunity was the EKS node groups, statically provisioned with generous instance sizes to avoid scheduling failures. We implemented Karpenter for intelligent, demand-driven node provisioning, replacing the static node groups entirely. In parallel, we rightsized all RDS instances using CloudWatch metrics, cleaned up 40+ unused Elastic IPs and idle load balancers, and implemented a tagging policy enforced through AWS Config.
The Result
Monthly AWS spend dropped from $40,000 to $12,000 within 8 weeks, a 70% reduction. The Karpenter implementation alone accounted for $18,000 of monthly savings by right-sizing nodes to actual workload demand. The engagement paid for itself within the first week of implementation. The team now has a monthly FinOps review process and budget alerts that flag anomalies before they compound.
Client identities are kept confidential by agreement. Metrics are verified and unexaggerated.
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Cloud Cost Optimization
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