Backend Engineer signal: bitmask DP + state compression in a multi-region cache context. This is a ProdMatch-owned backend engineer drill, framed as a March 2026 Meta Edge Platform simulation, not a copied platform question.
Company context
Meta · Edge Platform
Freshness
March 2026
Product surface
multi-region cache
ProdMatch interview simulation based on product-team patterns; not a claim of a real company question.
For multi-region cache, each keys requires a subset of capabilities. Choose the smallest team of services covering all required capabilities; tie-break by lowest total risk.
Input
Output
Constraints
Concepts
required={A,B,C}, services=[AB risk 4, C risk 1] -> count=2, risk=5
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