Ryan Lohan
Senior Principal Software Engineer at Atlassian
Melbourne, Victoria, Australia
Summary
🤩
Rockstar🎓
Top SchoolRyan Lohan is a Senior Principal Software Engineer and technology leader based in Melbourne with over 20 years of experience designing and delivering internet-scale systems across Amazon, AWS, Zillow, and Atlassian. He has driven billion-dollar product launches like Buy With Prime, modernized platform tooling such as AWS CloudFormation (including contributions to the CloudFormation CLI Java codegen), and transformed large engineering organizations to improve delivery, reliability, and developer productivity. Comfortable at the intersection of architecture, strategy, and culture, he partners with executives to align technical roadmaps to business outcomes and scale teams effectively. His work consistently emphasizes developer experience, CI/CD safety, and extensibility to enable faster, safer shipping. Colleagues rely on him to raise engineering standards and turn underperforming teams into high-impact organizations. Outside core engineering, he brings uncommon cross-domain experience—from diving instruction to fintech trading systems—that sharpens his risk-management and mentoring instincts.
10 years of coding experience
22 years of employment as a software developer
Bachelor of Engineering (BEng) Software, Bachelor of Engineering (BEng) Software at University of Technology Sydney
Portuguese, Spanish, English
Stackoverflow
6,517reputation
1.1mreached
167answers
26questions
wcf
top-5%
Github Skills (18)
json-schema10
java10
javas10
code-generation10
aws-cloudformation10
aws10
wcf9
maven9
jinja28
pytest7
wpf6
naming-conventions6
php6
parsing6
winforms6
Programming languages (5)
Github contributions (5)
aws-cloudformation/cloudformation-cli
Oct 2018 - Jul 2020
The CloudFormation Provider Development Toolkit allows you to author your own resource providers and modules that can be used by CloudFormation.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 47 commits, 31 PRs in 1 year 9 months
Contributions summary:Ryan primarily focused on enhancing the functionality and structure of the CloudFormation CLI's Java code generation capabilities. They implemented and refined Java code generation, including the integration of basic handler generation, stub handler implementations, and configuration models. Furthermore, the user addressed bug fixes and refactoring tasks, such as improving the handling of type names within the Java code generation. Their contributions significantly improved the project's Java code generation, schema validation, and overall reliability.
resource-providersaws-cloudformationproviderprovidersaws
aws-cloudformation/aws-cloudformation-resource-providers-ses
May 2019 - Mar 2020
The CloudFormation Resource Provider Package For Amazon Simple Email Service
Contributions:10 commits, 3 PRs, 2 pushes in 9 months
providerresource-provideramazonemailsimple-email-service
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