
The AI Bank Is Already Being Built - Eric Young (CTO, Nubank)
What does it take to turn one of the world’s largest digital banks into an AI-first company? In this episode of the WRAP UP podcast, I sit down with Eric Young, CTO of Nubank, to discuss how the company is using AI across engineering, credit, and customer experiences. Nubank has reported that its weekly AI token use grew almost 10x since the beginning of the year, while engineering productivity increased by 50% and testing cycles became 90% faster. Eric explains how the company thinks about the return on that investment, why there is no single perfect productivity metric, and how Nubank measures changes in code delivery, product velocity and automation without reducing the work to a simplistic scorecard. We discuss why Nubank is not betting on one AI provider or one model. Eric shares how the company dynamically routes workloads across different models based on performance, cost and quality, while also exploring self-hosted open-weight models. He explains why flexibility matters in a market where model capabilities are shifting quickly. Eric also takes us inside Nubank’s own foundation-model work. With 135 million customers and hundreds of terabytes of financial and app-event data flowing through the platform each year, Nubank is building models that can better understand financial behaviour, improve credit decisions, support responsible lending and personalise experiences at scale. We also discuss the harder side of AI in banking: • How AI can help banks detect fraud patterns in real time • Why clean, structured data can be a bigger advantage than simply having more data • How Nubank tests and evaluates AI systems before exposing them to customers • Where human oversight remains essential when AI interacts with financial decisions • How the company approaches accountability, guardrails and customer protection • Why incumbents with decades of data may still struggle if their data is fragmented or poorly structured • What Nubank sees as the real competitive challenge: rising customer expectations • The skills engineers, product managers and designers need to succeed in an AI-first organisation ______________ LinkedIn: https://www.linkedin.com/in/sirojboboev/ Newsletter: https://www.fintechwrapup.com/ Instagram: https://www.instagram.com/wrapuppodcast/ Tiktok: https://www.tiktok.com/@wrapuppodcast X: https://x.com/samboboev


















