AWS Case Studies
Real-world examples of how I've helped companies save ₹50Cr+ on AWS costs, migrate to serverless, and scale production systems.
Reduced AWS Costs by ₹2Cr/Year for FinTech Startup
The Challenge
A fast-growing FinTech startup was spending ₹3Cr annually on AWS with costs increasing 40% month-over-month. Their RDS instances were over-provisioned, they had no Reserved Instance strategy, and hundreds of unattached EBS volumes were accumulating.
The Solution
- Conducted comprehensive AWS cost audit across all services
- Right-sized RDS instances based on actual usage patterns (reduced from db.r5.4xlarge to db.r5.xlarge)
- Implemented Reserved Instance strategy for predictable workloads (3-year commitment)
- Automated cleanup of unattached EBS volumes and old snapshots
- Migrated infrequently accessed data to S3 Glacier
- Set up cost allocation tags and departmental budgets
- Implemented CloudWatch alarms for cost anomalies
The Results
Tech Stack
"Rahul saved us ₹2Cr in the first year alone. His deep understanding of AWS cost optimization is unmatched."
— CTO, FinTech Startup
Migrated SaaS Platform to Serverless - 10x Scale at 1/3rd Cost
The Challenge
A B2B SaaS platform was running on EC2 instances with manual scaling. They faced frequent downtime during traffic spikes, high infrastructure costs (₹8L/month), and slow deployment cycles (2-3 hours).
The Solution
- Designed event-driven serverless architecture using Lambda, API Gateway, and EventBridge
- Migrated REST API from Express.js on EC2 to Lambda + API Gateway
- Implemented DynamoDB with single-table design for high-performance data access
- Set up Step Functions for complex workflow orchestration
- Created CI/CD pipeline with GitHub Actions for automated deployments
- Implemented CloudFront CDN for static assets
- Added comprehensive monitoring with CloudWatch and X-Ray
The Results
Tech Stack
"The serverless migration was a game-changer. We now handle 10x traffic at 1/3rd the cost with zero downtime."
— Founder & CEO, SaaS Startup
Passed SOC2 Audit & Secured AWS Infrastructure for E-commerce Platform
The Challenge
An e-commerce platform needed to pass SOC2 Type II audit to win enterprise clients. Their AWS infrastructure had multiple security gaps: overly permissive IAM policies, unencrypted data at rest, no audit logging, and public S3 buckets.
The Solution
- Conducted comprehensive security audit based on AWS Well-Architected Framework
- Implemented least-privilege IAM policies with role-based access control
- Enabled encryption at rest for all RDS, DynamoDB, and S3 buckets
- Set up AWS CloudTrail for comprehensive audit logging
- Configured VPC with private subnets and NAT gateways
- Implemented AWS WAF to protect against common web exploits
- Set up AWS Config for continuous compliance monitoring
- Created incident response runbooks and disaster recovery plan
The Results
Tech Stack
"Rahul's security expertise helped us pass SOC2 and win our largest enterprise clients. Worth every rupee."
— VP Engineering, E-commerce Platform
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