FIS | Forward Deployed Engineer (Senior) | System Design | Technical Deep Dive
bad_biryani·Interview Date:July 9, 2026Region:NA (North America)Hiring Team/Org:OpenCoreOs
Context: OpenCoreOS is a cloud native core banking platform. Banks build financial products on top of it — current accounts, savings, cards, lending — using a programmable ledger. The scenario A bank running OpenCoreOS receives a daily settlement file from card networks (Visa, Mastercard, AMEX). Each record corresponds to a hold placed in the ledger earlier — when a customer first swiped their card. The pipeline you'...
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