Dan Kroymann
Principal Software Engineer at Snap Inc.
Bothell, Washington, United States
Summary
👤
Senior🎓
Top SchoolDan Kroymann is a Principal Software Engineer and co-founder turned architect with two and a half decades of experience building games, mixed-reality apps, and the cloud services that power them. As the architect of Rec Room’s high-concurrency backend and realtime networking, he specializes in scalable, low-latency systems for social VR and has a track record of shipping production platforms. His earlier tenure at Microsoft includes work across Xbox and HoloLens launch teams, blending systems engineering with product-facing features and demo-grade prototypes. Now based in Bothell and contributing to open-source projects like SixLabors/ImageSharp, he focuses on pragmatic improvements to performance, reliability, and cancellation-aware APIs. Known for bridging deep technical ownership with leadership at startup scale, he brings both founder grit and enterprise experience to complex distributed systems.
8 years of coding experience
23 years of employment as a software developer
BS, Computer Science, BS, Computer Science at Stanford University
Stackoverflow
282reputation
4kreached
2answers
1question
Github Skills (20)
image-processing10
net10
dotnet10
imagesharp10
asp-net10
dotnet-core10
csharp10
tiff9
gif9
graphic9
drawing9
bmp9
png9
jpeg9
webp9
Programming languages (2)
Github contributions (5)
SixLabors/ImageSharp
Feb 2022 - Feb 2022
:camera: A modern, cross-platform, 2D Graphics library for .NET
Role in this project:
Back-end Developer
Back-end DeveloperContributions:4 reviews, 9 commits, 2 PRs in 3 days
Contributions summary:Dan primarily focused on enhancing the image processing library's core functionality by addressing stream handling and improving API methods. They implemented features to preload streams into memory for more robust image loading operations. In addition, the user plumbed `CancellationToken` throughout multiple IImageDecoder and IImageInfoDetector methods to facilitate more effective task cancellation. These changes demonstrate a focus on improving performance, reliability and maintainability within the image processing library.
bmpvulkancamerac-sharpjpeg
kroymann/ImageSharp.Web
Dec 2018 - Apr 2022
:globe_with_meridians: Middleware for ASP.NET-Core for image manipulation.
Contributions:16 pushes, 10 branches in 3 years 3 months
globemanipulationimageimage-manipulationasp
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.