Amazon

FinTech Tax Payments

• Built and maintained Java-based RPC services for Amazon’s tax payments platform, processing $10.2B in annual volume with 100% on-time execution.
• Reduced DynamoDB latency by 60% (400ms to 150ms) by implementing batching and query projection, eliminating throttling in high-traffic production environments.
• Centralized access control by replacing a manual, ticket-based system with an in-house permission service, allowing multiple teams to self-onboard which reduced access approval time from days to seconds.
• Enhanced system reliability and incident detection by implementing comprehensive CloudWatch monitoring and audit logging for critical tax payment workflows.