Hello, I'm

Christian Romney

Director of Engineering, U.S. Market @ Nu

Building scalable systems and high-performing teams that serve millions.

Christian Romney
QCon AI NYC Dec '25

About Me

I'm an engineering leader passionate about functional programming and building high-performing teams. Currently directing engineering for the U.S. Market at Nu, one of the world's largest digital banks.

With 25+ years of experience spanning startups and scale-ups, I've specialized in Clojure and functional programming, contributing to open source projects like the Pedestal framework.

Based out of Miami, I work remotely with teams across the Americas and am fluent in English, Spanish, and Portuguese.

Learn more about Nu:
Engineering BlogYouTubenu.co

Technical Expertise

Core competencies and specializations

Languages & Frameworks

  • Clojure / ClojureScript
  • Datomic
  • Ruby on Rails
  • JavaScript
  • Python

Engineering Leadership

  • Team Building & Management
  • Technical Strategy
  • Engineering Culture
  • Mentorship & Coaching
  • Talent Development

Architecture & Systems

  • Distributed Systems
  • Microservices Architecture
  • Functional Programming
  • API Design
  • System Scalability

Open Source & Community

  • 32+ GitHub Repositories
  • Pedestal Contributor
  • O'Reilly Contributor
  • Technical Writing
  • Podcaster

Projects & Contributions

Selected work and open source contributions

Pedestal Framework

Core Contributor • 2013-2015

Contributed to core libraries and documentation.

Clojure Web Framework Open Source
View on GitHub →

O'Reilly Rails Cookbook

Contributing Author • 2007

Contributed 10 recipes covering advanced Ruby on Rails techniques and best practices. Published by O'Reilly Media.

Ruby on Rails Technical Writing Education
View on O'Reilly →

The Hammock Podcast

Co-Host • 2021-Present

Engineering culture podcast at Nu exploring software development, functional programming, and technical leadership topics.

Podcast Engineering Culture Leadership

Open Source Tools

32+ Repositories

Various open source projects including Diceware (passphrase generator), Prisoners (functional library), and Quiz-compile (education tooling).

Clojure Utilities Open Source
View GitHub Profile →

Media & Talks

Podcasts, interviews, and technical discussions

The Hammock Podcast

Co-Host • 2023-Present

Nu's engineering podcast exploring software development, functional programming, and technical leadership. Named after Rich Hickey's famous talk about problem-solving away from the computer.

Podcast Engineering Culture Clojure
Listen on Apple Podcasts →

The Cognicast

Co-Host • Multiple Episodes

Hosted episodes of Cognitect's podcast about software development and the people who create it, featuring conversations about Clojure, functional programming, and software engineering.

Podcast Clojure Cognitect
View All Episodes →

GOTO Unscripted: Functional Programming

With Russ Olsen • GOTO Conferences

Expert discussion exploring functional programming paradigms, advantages, and common misconceptions with Russ Olsen, author of "Getting Clojure" and fellow Nu engineering director.

Video Functional Programming GOTO
Watch Video →

Let's Connect

I'm always interested in discussing functional programming, engineering leadership, and building great teams