Marco De Jongh
Principal Engineer at Atlassian
Sydney, New South Wales, Australia
Summary
🤩
Rockstar🎓
Top SchoolMarco De Jongh is a Principal Engineer based in Sydney with 12 years of experience building scalable web applications and developer tools across front-end and back-end domains. He has advanced Atlassian's engineering efforts since 2015 and previously led product and framework work at GfK, where he introduced TDD practices, faster test suites, and componentized architectures. A pragmatic polyglot, he has shipped performance improvements and migrations from legacy stacks to modern frameworks (Meteor, Node.js, ASP.NET MVC) and mentored teams through those transitions. Marco is also an active open-source contributor—improving widely used projects such as react-syntax-highlighter and Facebook’s jscodeshift—where he added async tests, dependency upgrades and a fail-on-error CLI flag that hardened developer workflows. He brings a hands-on leadership style that blends deep technical refactors with practical developer experience improvements.
12 years of coding experience
11 years of employment as a software developer
Computer Science, Computer Science at Haagse Hogeschool Den Haag
English, Dutch
Stackoverflow
5,388reputation
218kreached
64answers
5questions
meteor
top-5%
sed
top-5%
macos
top-5%
bash
top-5%
Github Skills (23)
code-transformation10
javascript10
nodejs10
react10
async9
testing9
command-line-interface9
asynchronous9
bash9
meteor9
command-line9
sed9
cli9
macos9
build-tools9
Programming languages (10)
Github contributions (5)
react-syntax-highlighter/react-syntax-highlighter
Oct 2018 - Feb 2019
syntax highlighting component for react with prismjs or highlightjs ast using inline styles
Role in this project:
Front-end Developer
Front-end DeveloperContributions:65 commits, 17 PRs, 13 pushes in 4 months
Contributions summary:Marco primarily focused on improving the React syntax highlighting component. They added tests for asynchronous prism functionality, fixed a bug, and made adjustments to the component's internal workings. The user also upgraded the project's dependencies, specifically upgrading to babel 7, and made code formatting improvements.
highlightjsinline-stylesprismjsreactsyntax-highlighting
facebook/jscodeshift
Mar 2021 - Mar 2021
A JavaScript codemod toolkit.
Role in this project:Back-end Developer
Back-end DeveloperContributions:1 review, 7 commits, 3 PRs in 10 days
Contributions summary:Marco primarily focused on enhancing the functionality of the `jscodeshift` tool. Their contributions involved adding and modifying command-line options, specifically introducing a `fail-on-error` flag to control the return code behavior upon errors. They refactored code by renaming variables and adjusting option ordering, indicating a focus on improving the tool's usability and robustness. The user's work modified core functionality within the build tools scripts.
codemodjavascript
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