17–19 October 2016: Conference & Tutorials
19–20 October 2016: Training
London, UK

Transitioning to microservices

Cassandra Shum (ThoughtWorks), Ryan Oglesby (ThoughtWorks)
14:00–17:30 Wednesday, 19/10/2016
Location: Sandringham Level: Intermediate
Average rating: ****.
(4.33, 3 ratings)

Prerequisite knowledge

  • Basic knowledge of programming in any high-level language (Java, Ruby, C#, JavaScript, etc.)

Materials or downloads needed in advance

  • A laptop with 10 GB of free disk space and admin rights to install software, as well as access to all ports and usb connections (Windows and Mac OS X are supported; limited support for Linux distributions may be provided, but we’ll assume you know how to get the necessary software installed yourself.)

What you'll learn

  • Gain hands-on experience on how to approach moving to microservices, using concepts like domain-driven design and consumer-driven contracts


Agile practices and techniques like continuous delivery and evolutionary architecture are all about being able to react to changes rapidly. However, putting them into practice when you have a big legacy monolith application can be a difficult job. The industry has come out with different ideas to solve this problem; microservices, pushed by companies like Netflix and Amazon, are the latest solution.

Having an architecture based on services offers many advantages (like scalability and technical flexibility), but it comes with upfront costs and complexity that few companies are in a position to pay. Cassandra Shum and Ryan Oglesby explore the prerequisites for moving into a microservices architecture and provide tips on how to achieve them via engaging exercises.

Topics include:

  • CD readiness
  • Continuously building, testing, and deploying microservices autonomously
  • Testing microservices and ensuring changes do not break dependent systems
  • Deploying and scaling microservices in a multihost Docker environment
  • Operational concerns
Photo of Cassandra Shum

Cassandra Shum


Cassie Shum is the technical director and principal consultant for the east portfolio in North America at ThoughtWorks. A software engineer and architect, she’s spent the last nine years focusing on architectures including event-driven systems and microservices, a wide range of technologies with an emphasis on mobile and software delivery excellence, and she’s helped grow delivery practices and technical strategy and support the next generation of technologists. Some of her passions include advocating for women in technology and public speaking. She’s involved in promoting more female speakers in technology.

Photo of Ryan Oglesby

Ryan Oglesby


Ryan Oglesby is an application developer at ThoughtWorks, where he has worked on products ranging from native mobile applications to an enterprise banking platform built on domain-driven design, CQRS, and event sourcing. Ryan is currently a senior consultant and technical lead who builds high-quality, valuable software as well as strong technical community among teams through communication, empathy, and inclusivity.

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Bastian Blachetta
4/10/2016 13:19 BST

What software will be installed and will it work with Windows XP?