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Umaru Biango
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FIELD NOTEBOOK · FILED UNDER
infrastracture
all
adoption
ai
development
infrastracture
NIN
open-source
product
sierra-leone
strategy
NO. 03
JUN 2026 · IDENTITY
Building Sierrafy: An Open Identity Verification SDK for Sierra Leone
93% of Sierra Leoneans hold a NIN, but developers have no open way to verify one.
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