Engineering at Meta8 min read
Open-Sourcing Rebalancer: A Generic, High-Performance Library for Solving Assignment Problems
We’re open-sourcing Rebalancer, the assignment-problem solver that has been used to solve resource allocation problems throughout Meta for over nine years.
By Richard Barnes, Neeraj Kumar, Pol Mauri RuizMeta Engineering

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Originally published by Meta Engineering on Sep 21, 2026.
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