Callum Duffy is a Senior Software Engineer I at Checkout.com, specializing in financial experience projects within the FX team since November 2023. Prior to this role, Callum held positions at Toast from February 2021 to September 2023, first as a Software Engineer II and then as a Senior Software Engineer, focusing on identity management, authentication, and user workflow using Kotlin and Java. Callum's experience also includes a tenure at JPMorgan Chase & Co. from September 2019 to February 2021, where responsibilities involved developing and securing cloud-native services in the Cyber Security division utilizing Python and AWS. Earlier, Callum worked at Revenue (Ireland) for a brief period in 2018, developing backend systems in an Agile team environment. Callum holds a Bachelor of Applied Science in Computer Science from Trinity College Dublin, completed in 2018, and a Leaving Certificate from Dundalk Grammar School.
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