EC2 API team out of Amazon’s Cape Town office — a team of about eight building the external API surface for what was, at the time, one of the largest distributed systems ever run.

• Developed the EC2 API, Caching, and Tagging services across 10 global regions.
• On-call rotation for >1000 production hosts — incident response and root-cause analysis on a team where mistakes were measurable in customer-visible ways.
• Led deployment of the team’s services into the new Beijing EC2 region — flew to Seattle for the launch.
• Identified and fixed a performance bottleneck in the slowest EC2 API call.
• Implemented new EC2 IAM permissions; contributed to service observability and metrics.
• Mentored interns and conducted interviews.