Andrew Harmel-Law
Live online courses, books, and videos on O’Reilly
Upcoming live online training courses
July 14, 2026
Architecture Decision Making by Example
Why do architectures so frequently get in the way of teams, slow them down, or make their lives harder when they're supposed to be helping? Join expert Andrew Harmel-Law to learn ...
August 12, 2026
Domain-Driven Design: First Steps
By helping you collaborate with expert users (“domain experts” in DDD), tapping into their existing mental models, and consequently building deep, insight into the problems you’re trying to solve, DDD helps ...
Bio
A Tech Principal at Thoughtworks, Andrew specializes in domain-driven design, org design, software and systems architecture, agile delivery, build tools and automation.
Andrew is also an author and trainer for O’Reilly. They’ve written one book about facilitating software architecture and one chapter about implementing the Accelerate/DORA four key metrics. They also run regular online training sessions in Domain-Driven Design (First Steps) and Architecture Decision Making by Example.
Experienced across the software development lifecycle and in many sectors, what motivates them is the humane delivery and sustainable evolution of large-scale software solutions that fulfill complex user needs. They understand that people, architecture, process and tooling all have key roles to play in achieving this.
Andrew has been involved with OSS to a greater or lesser extent since their career began; as a user, contributor, expert group member, or paid advocate—most notably as one of the Jenkins JobDSL originators.
Andrew enjoys sharing their experience as much as possible. This sharing is not only seen in their formal consulting engagements and writing, but also informally through mentoring, blog posts, conferences (keynoting, speaking and organising), and open-sourcing their code.