Production work, with what went wrong left in.
Each case study names the decision, the alternatives, the failure that taught something, and results tied to a verified proof record. Clients are named only where Rahul has approved it.
- 01AWS cost audits: up to 55% lower spendTwo-week AWS cost audits for fintech, e-commerce and SaaS clients: 47 idle EC2 instances removed, Savings Plans coverage 0% to 78%, spend down up to 55%.
- 02Enterprise RAG on Bedrock across 2M+ documentsA production RAG platform on Amazon Bedrock: answers in under 10 seconds instead of 30+ minutes, MRR@10 from 0.31 to 0.78, about 60% lower repeated LLM spend.
- 03KFC Thailand: PHP monolith to event-driven orderingHow KFC Thailand's ordering platform moved from a failing PHP monolith to event-driven services: P99 2.8s to under 200 ms, about 30% lower infra cost.