Mark Osborn
Senior Principal Software Engineer at CoStar Group
San Diego, California, United States
Summary
👤
Senior🎓
Top SchoolMark Osborn is a Senior Principal Software Engineer based in San Diego with over 20 years of industry experience and more than a decade focused on scalable cloud architectures and enterprise systems. He specializes in C#, design patterns, AWS, and infrastructure, and has led projects that cut costs dramatically—such as an in-house video transcoding and hosting platform that reduced expenses by 80% while improving quality. At CoStar Group he’s driven cross-team initiatives from real-time data pipelines with Kafka and Kubernetes to inner-source migrations, observability adoption, and post-acquisition integrations. A pragmatic mentor and hire-trainer, he bridges hands-on engineering with architecture and process improvements, and has supported high-stakes uptime during major live events. Outside work he’s a self-described “music-loving geek,” reflecting a long-standing curiosity and quick ability to learn new technologies and methodologies.
10 years of coding experience
26 years of employment as a software developer
MEng, Computer Science, MEng, Computer Science at University of Bristol
Github Skills (106)
converting10
swagger10
openapi-generator10
rest-api10
openapi10
migrate10
swagger-tools10
code-generator10
convert10
stubs10
linux10
dotnet10
codegen10
swagger-ui10
api10
Programming languages (7)
Github contributions (5)
ozziepeeps/Swashbuckle.AspNetCore
Oct 2022 - Feb 2025
Swagger tools for documenting API's built on ASP.NET Core
Contributions:11 pushes, 6 branches in 2 years 3 months
swagger-toolsapiaspnetapi-sasp
ozziepeeps/CsprojToVs2017
Dec 2017 - Mar 2018
Contributions:21 pushes, 2 branches in 2 months
visual-studio-extensionvisual-studio-2017convertingtoolingvisual-studio
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.