architecture Archives

Why Traditional Software Estimates Fail – And How Vaughn Vernon’s ‘No Estimates’ Approach Fixes It

April 29, 2025 No Comments

Software development teams around the world face a recurring challenge: accurate project estimation under pressure to deliver fast. Even with frameworks such as Scrum or different agile approaches in place, missed deadlines and exceeded budgets are still common issues. Vaughn Vernon, a prominent expert in Domain-Driven Design (DDD) and author of “Implementing Domain-Driven Design” and

Microservices and [Micro]services

April 9, 2020 No Comments

The week began as busy as ever. And then I learned that one more task — beyond everything else on my plate — must be accomplished. Which task? The one you are reading. Why? For the record, at Uber, we’re moving many of our microservices to what @copyconstruct calls macroservices (wells-sized services). Exactly b/c testing and maintaining thousands of

Using XOOM/PLATFORM On AWS Fargate

March 12, 2020 No Comments

I consider myself a refugee from the old JEE architectures. Threading was handled (naively, for the most part) by the container. Requests were synchronous, transactions distributed. The applications were deployed to a private data center, so scaling the ponderous beast was handled by scaling out (nodes to a weblogic cluster) and scaling up (increasing memory

Are You A Techie?

February 29, 2020 No Comments

Are you a technical person? I am often asked that question. Why? Does the answer matter? I believe most are curious and ask simply to understand how to communicate with me. Or, perhaps the person is trying to figure out which box to tick next to my name. I get that. But, really, aren’t we

Introducing XOOM

October 22, 2019 No Comments

The easiest way to get up and running quickly with XOOM, along with an explanation of our position on open source innovation. We’ve decided to introduce a familiar way to learn the different components of the XOOM toolset—without the need to understand everything about our platform up front. It is our belief that all application

The XOOM/PLATFORM Architecture: Part 1

January 24, 2018 No Comments

Several have requested a document describing the XOOM/PLATFORM architecture. So here it is. This specific article is kept relatively brief. This is in part to emphasize the simplicity of the XOOM/PLATFORM. It’s just not complicated or difficult to describe. The other motivation for brevity is not knowing entirely what architects and developers are looking for in

XOOM: Our Open Source Reactive Platform

December 23, 2017 No Comments

This new platform represents my vision for software development from years ago. I have taken a few side tracks along the way. Previously I felt that I would be better off trying to contribute my vision to heavily funded efforts that have multiple teams, those that would easily out perform me alone. That was a

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