Macklin Hartley Distributed Software Systems Engineer Email · Twitter · Github · LinkedIn

I am a Software Developer with over 7 years of experience building highly-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, and deploying software frequently with a high degree of automation.



  • Typescript
  • Javascript
  • React
  • HTML
  • CSS
  • .NET
  • C#
  • Java
  • Kotlin


  • Kubernetes
  • Docker
  • AWS
  • Micro-services
  • UI/UX Design
  • Software Architecture
  • Node
  • Distributed Systems


  • Domain Driven Design
  • Event Sourcing
  • CQRS
  • DevOps
  • Continuous Delivery
  • Payments Processing
  • Agile Development
  • Customer Acquisition and Retention


Engineering Squad Lead

VGW, Perth – May 2018

  • 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 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 an benefit of up to US$30m in yearly revenue.


Cash Converters, Perth – September 2016

  • 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 Australia, Perth – September 2012

  • 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