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SE Radio 735: Vivek Yadav on Regression Testing Microservices

SE Radio 735: Vivek Yadav on Regression Testing Microservices

Software Engineering Radio - The Podcast for Professional Software Developers vor 1 Monat

0:00

59:06

Vivek Yadav, an engineering manager at the payment company
Stripe, speaks with host Adi Narayan about building regression
testing for microservices. Drawing on his work estimating network
costs for card payments, Vivek explains why unit and integration
tests fall short when a single transaction's cost can depend on
100+ parameters across card networks, countries, and merchant
types. He describes Stripe's approach: structuring services so
that core logic is stateless and separated from I/O, then
wrapping that logic in an Apache Spark job that replays
historical transactions from cold storage to compare old versus
new outputs at a granular, per-transaction level. This allows
Stripe to validate major migrations with far more confidence and
speed than a traditional shadow-rollout, and it now doubles as a
tool for assessing network rule changes, debugging incidents, and
even showing customers how a pricing change will affect their
costs. The episode closes by noting the same pattern applies
wherever AI-driven code changes need fast, reliable evals.