September 5, 2026 Three Ways to Wire Two Services on AWS A shop and a pharmacy, wired three ways: NAT gateways and IP allowlists, queues between VPCs, IAM identity instead of addresses. Same code, different security.
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September 5, 2026 floci: Which Parts of AWS Run Locally for Real I put floci, a LocalStack replacement, through the services a two-VPC design needs. Lambda, ECS, RDS and SQS run. WAF and API Gateway AWS_IAM enforce nothing.
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May 29, 2026 DynamoDB single-table design, worked through Four entities, six access patterns, one table, one GSI. The key design walked step by step with the runnable repo behind it.
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May 27, 2026 Orchestration with Step Functions The same four-step order saga, this time driven by a Step Functions state machine. Catch blocks for compensation, no event bus.
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May 26, 2026 Choreography with EventBridge Four Lambdas coordinated through EventBridge events, deployed to LocalStack. The first half of a saga pattern comparison; the orchestration version comes next.
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