Mark Ledwich
Software Engineer at Swift Centre
Queensland, Australia
Summary
👤
Senior🎓
Top SchoolMark Ledwich is a full-stack software engineer and data specialist based in Queensland with nine years of commercial experience building polished web apps, embedded visualisations, and self-serve analytics platforms. He has led data teams and architected production pipelines at scale—designing systems that processed metadata for 800K+ YouTube channels and ran a 15TB warehouse used by a VC-backed startup. Comfortable across C#, Python, React/TypeScript and modern cloud data stacks, he combines hands-on backend fixes (notably improving .NET JSON schema handling) with front-end UX work on high-profile visualization projects like owid-grapher. Mark has founded and shipped analytics products, contributed to research that influenced public understanding of recommendation systems, and frequently turns messy real-world data into actionable dashboards in Power BI and Tableau. An insatiable reader and podcaster, he brings curiosity about biotech, psychology and politics to pragmatic engineering decisions—his hobby of political YouTube analysis directly informed impactful public-facing tools.
9 years of coding experience
17 years of employment as a software developer
Bachelor of Engineering - BE, Bachelor of Engineering - BE at The University of Queensland
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (18)
data-visualizations10
unit-testing10
json-schema10
net10
typescript10
dotnet10
data-visualisation10
asp-net10
typescript-types10
dotnet-core10
data-visualization10
typescripts10
csharp10
react10
javascript9
Programming languages (8)
Github contributions (5)
owid/owid-grapher
Feb 2020 - Feb 2020
A platform for creating interactive data visualizations
Role in this project:
Front-end Developer
Front-end DeveloperContributions:15 commits, 1 PR, 6 comments in 21 days
Contributions summary:Mark primarily focused on enhancing the user interface and improving the data visualization platform's functionality. Their work involved implementing and refining interactive form elements such as `NumberField`, `NumberInputField`, and color scheme selection. They also addressed several bugs and made adjustments related to how decimal values are handled within input fields and axis configuration. Overall, the contributions indicate a strong emphasis on improving the user experience.
data-visualizationdata-visualizationsreacttypescript
RicoSuter/NJsonSchema
Feb 2017 - Mar 2017
JSON Schema reader, generator and validator for .NET
Role in this project:Back-end Developer
Back-end DeveloperContributions:6 commits, 3 PRs, 7 comments in 24 days
Contributions summary:Mark primarily focused on enhancing the `njsonschema` library. Their contributions involved fixing issues related to schema generation, particularly handling inheritance and `KnownType` attributes in .NET projects. They also improved the library's resilience by addressing internal exceptions during XML documentation retrieval and implementing improvements related to contract resolver. The user further added and modified tests to validate the changes.
dotnetjson-schema
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