Simeon Leatherland
Software Engineer at atlassian
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolSimeon Leatherland is a software engineer with eight years' experience building large-scale distributed systems and developer tools, most recently contributing to Atlassian’s Automation Platform that scaled from 4M to 100M rule executions per day and served 230k tenants. He’s strong in backend engineering and platform design, with hands-on experience growing a platform team from 11 to 80 engineers and enabling agentic workflows. Simeon has proven experience in performance-sensitive systems (gaming infrastructure handling thousands of concurrent users and near-million spin events) and meaningful open-source contributions, including refactoring graphql-java to improve scalar handling and schema printing. Based in New York, he blends product-focused engineering with developer ergonomics and test-driven improvements that reduce operational friction. Outside of tech he channels creative energy into music — hosting a radio show and running a vinyl distribution venture — revealing an entrepreneurial streak and attention to detail. He’s actively exploring new opportunities where scalable systems, developer experience, and a taste for creative side projects intersect.
8 years of coding experience
6 years of employment as a software developer
Bachelor of Science (B.S.), Software Engineering, Bachelor of Science (B.S.), Software Engineering at Curtin University
Github Skills (6)
javas10
graphql10
graphql-java10
wordpress-graphql10
wpgraphql10
java10
Programming languages (3)
Github contributions (5)
graphql-java/graphql-java
Jan 2020 - Feb 2020
GraphQL Java implementation
Role in this project:
Back-end Developer
Back-end DeveloperContributions:10 commits, 3 PRs, 7 comments in 18 days
Contributions summary:Simeon primarily focused on refactoring the `graphql-java` library by removing Java types as standard scalars and treating them as custom scalars. This involved modifying the `SchemaPrinter`, `ScalarInfo`, `TypeDefinitionRegistry` and related test files. They also added tests to demonstrate that unused scalars are omitted by default, and updated existing tests. These changes suggest a focus on improving the library's core functionality and its schema printing capabilities.
javagraphql-javagraphql
simeonleatherland/website
Jan 2018 - May 2021
Website
Contributions:21 PRs, 52 pushes, 3 branches in 3 years 3 months
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