Own the rules engine that decides who gets billed for every AWS transaction, worldwide

This is an SDE role on AWS Invoicing Entities, the team that owns the systems defining, storing, resolving and syncing entity/billing-relationship data behind every AWS commerce transaction. You'd design distributed services across DynamoDB, OpenSearch, Kinesis, SNS, AWS Glue, and cross-region replication, and extend a Seller-of-Record rules engine with direct legal/tax/compliance consequences.

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What this interview tests

Distributed systems design at Tier-1 billing-path reliability bar
Entity resolution / rules-engine design for legal-compliance-sensitive data
AWS primitives: DynamoDB, OpenSearch, Kinesis, SNS, Glue, cross-region replication
Object-oriented design for large-scale, multi-tiered systems
Operational ownership: full lifecycle from design to production excellence