- architecture
- redis
- dynamodb
- caching
- performance
- aws
- engineering
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Your AI Coding Agent Changes Are Running on Vibes
AI coding agents are only half model. The other half is the harness around them, and evals are how teams stop changing that harness by feel.
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Scaling Our Microservice Made Latency Worse - Here's How We Fixed It
We prescale for EC2 headroom and regional failover during business-critical times. Low traffic left DynamoDB connections idle and the HTTP client we'd chosen for fast pod startup closed them in ~5s. Here's how we fixed p99 with configurable idle timeout and TCP keepalive.
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Stop Writing Data You Never Read
At 2,600 TPS, we were executing 85M writes daily for data we rarely read. Here's how understanding our access pattern reduced writes by 75% using caching.