Building at the intersection of banking and technology.

I’m Sage — I work in banking and build web products. I write about credit risk, financial systems, and how modern software changes both.

Focus
  • Banking
  • Web Dev
  • Credit Risk
  • Crypto
Portrait of Sage Jarrow Young

About

I help bridge finance and software — designing credit risk models, building web applications, and exploring crypto’s implications for payments and markets.

Principles

  • Practical > theoretical; ship, then refine
  • Clarity and simplicity in systems
  • Skin in the game

“It is not the critic who counts... The credit belongs to the man who is actually in the arena...”

— Theodore Roosevelt, 1910

Focus

Four pillars of work and writing.

Banking

From deposit flows to lending structure — operational depth and strategy.

Web Development

Modern, performant interfaces — thoughtful UX and robust engineering.

Credit Risk

Pragmatic modeling and controls that serve customers and P&L.

Crypto

Infrastructure, issuance models, and market design with a risk lens.

Selected Work

Practical builds and experiments.

Web • ML in the browser

Interactive Loan Data Analysis

TensorFlow.js powered, client-side exploration of loan performance — privacy-first and fast.

Case study
E‑commerce

Laybella.co.uk

Elegant storefront on WordPress + WooCommerce with conversion-focused UX.

Case study
Web App

CastleWatch

Exploring security monitoring and alerting — lightweight and transparent.

Case study

Say hello

Open to conversations on products, risk, and modern banking.