Trade-offs & Decision Making

Senior engineers are judged by how they reason about trade-offs, not just by knowing the right answer.

Phrase	Usage
the trade-off here is...	"The trade-off here is consistency vs. availability."
this comes at the cost of...	"Caching speeds up reads, but this comes at the cost of stale data risk."
given our constraints...	"Given our 2-week timeline, a monolith is more practical."
it depends on the use case	"Whether to use SQL or NoSQL depends on the use case."
the right tool for the job	"Redis is the right tool for this caching use case."
pragmatic choice	"The pragmatic choice here is to use an existing library."

"I would evaluate this along three dimensions: performance, maintainability, and cost."
"In the short term, X. In the long term, we should consider Y."
"The simplest solution that meets the requirements is usually the right one."

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