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Joao EstorninhoJE
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Joao Estorninho

@joaoestorninho

I build secure financial APIs and enterprise integrations at scale.

Portugal
Message

I've built PSD2-compliant Open Banking APIs and Azure integrations at Millennium BCP for a platform serving 2M+ digital banking users, processing millions of financial transactions monthly. I secure regulated financial services with OAuth2 authentication and request-signing mechanisms, and resolve API reliability issues using Azure Log Analytics.

I've also automated Microsoft Dynamics 365 and Fortnox billing workflows at Sirocco Sweden, reducing billing preparation from one week to a few minutes. Across .NET, Python, Kotlin, SQL, Kubernetes, and mobile development, I deliver enterprise services, ERP integrations, and practical digital-transformation solutions.

Experience

Work history, roles, and key accomplishments

Education

Degrees, certifications, and relevant coursework

Nova School of Science and Technology logoNT

Nova School of Science and Technology

Master of Science, Computer Science

2015 - 2022

MSc in Computer Science with coursework in Artificial Intelligence, Algorithms, and Computer Networks.

Comenius University logoCU

Comenius University

Exchange Program, Computer Science

2019 - 2019

Exchange program at the Faculty of Mathematics and Informatics.

Tech stack

Software and tools used professionally

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