Macklin Hartley
Macklin Hartley

Macklin Hartley

About Me

I am a Software Developer with over 9 years of experience building scalable distributed systems. I'm passionate for modern design patterns and architectures such as Domain Driven Design, Event Sourcing and CQRS.

I am an advocate for creating cultures of ownership, accountability, transparency and trust. I'm a strong believer in the value of Continuous Delivery, deploying software frequently with a high degree of automation.


Classes in TypeScript
All the Tools I Used to Build this Website
Configuring Access Management in Amazon EKS with IAM Roles for Service Accounts
Understanding and Managing the Node.js Application Lifecycle
7 Useful Tools for Tracking Web Performance
How to Create AWS Route53 Subdomains with Multiple Accounts

Public Speaking

YOW! 2022: Just-in-time Architecture
DDDPerth 2022: How Fast is your Website Really?
DDDPerth 2021: Everything is a Feature Toggle
DDDPerth 2019: Every Good Outage Starts with a Queue
Localhost PER: Web Accessibility in Practice



AWS Certified Solutions Architect - Associate Expires February 2025 View Certificate


AWS Certified Developer - Associate Expires November 2025 View Certificate


Snowflake Hands On Essentials - Data Warehouse Expires January 2025 View Certificate


Virtual Gaming Worlds Engineering Manager (March 2021 - Present) Senior Software Engineer (Jun 2019 - March 2021) Software Engineer (May 2018 - Jun 2019)

  • Built a set of data pipelines to extract, transform and load billions of events with an SLO target of under 15 minutes, doubling email click-rate from 22% to 44%.
  • Worked with the back-office and payments engineering teams to develop reliable and secure centralised systems.
  • Designed and built a robust and scalable payments platform hosted on Amazon's EKS platform processing over US$1 billion in payments per year.
  • Implemented low latency metrics and observability tools for ensuring the availability and reliability of Martech and payments processing, achieving an availability of over 99.95%.
  • Helped advocate for culture of continuous delivery, creating a platform that enabled teams to deploy releases frequently (100+ deployments/month) with a high degree of automation.
  • Designed the organisation’s first service level agreement, setting the bar for a culture of ownership, accountability, transparency and trust.
  • Designed a credit card routing platform to optimise for authorisation rate and fee structure based on various factors including BIN ranges, applying a benefit of up to US$30m in yearly revenue.

Cash Converters Software Developer (September 2016 - May 2019)

  • Developed new platform for online application process using ASP.Net Core API’s and a cutting-edge ReactJS front-end.
  • Redeveloped tool for gathering supporting documents for applicants, improving speed, uptime and redundancy.
  • Integrated live chat system and 2FA into existing applications.
  • Developed a prototype for a next-generation CMS using Jekyll static site generator and presented findings to the team.
  • Ran presentations to senior management on the benefits of web accessibility.

NEC Software Developer (September 2012 - September 2016)

  • Developed an online portal for the Department of Water to manage water resources and licensing
  • Lead user-experience and accessibility analyst for online platform
  • Added change tracking feature to online retention and disposal application
  • Enhanced error handling for Word Document import service
  • Assisted in developing responsive stylesheets for mobile-first volunteer application for St John Ambulance


She Codes Website

In my free time I love mentoring and volunteering my time to helping others grow, volunteering my time with the She Codes Plus program.

DDD Perth Github Repository · Website

Before the 2018 DDD Conference in Perth, I was asked to provide an external accessibility audit of the main conference website. I made several recommendations to improve the inclusiveness of the design.