Kjell Otto
Freelance Software Developer Architect at Kjell Otto
Hamburg, Germany
Summary
👤
Senior🎓
Top SchoolKjell Otto is a freelance software developer and architect based in Hamburg with 13 years of experience designing front-end architectures and building backend and distributed systems. Pragmatic and detail-oriented, he seeks concise, elegant solutions and is comfortable moving between C#, JavaScript, Python and automation tooling. He has led performance-focused improvements—such as a 20% frontend speedup and 50% data reduction for a calendar visualization—and contributed to open-source work by refactoring and hardening a C# VerbalExpressions library. Available for small projects and consulting, he pairs hands-on coding with architecture-level thinking and a fast-learning approach to new domains.
13 years of coding experience
9 years of employment as a software developer
Master of Science (MS), Computer Science, Master of Computer Science, Master of Science (MS), Computer Science, Master of Computer Science at Hochschule für Angewandte Wissenschaften Hamburg (HAW Hamburg)
German, English
Github Skills (10)
unit-testing10
regular-expression10
asp-net10
nunit10
net10
dotnet10
refactoring10
csharp10
refactor10
dotnet-core10
Programming languages (16)
Github contributions (5)
VerbalExpressions/CSharpVerbalExpressions
Aug 2013 - Sep 2013
Role in this project:
Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:13 commits in 1 month
Contributions summary:Kjell focused on refactoring and improving the C# VerbalExpressions library. They removed obsolete references, introduced a sealed class for predefined enums, and refactored the code to use a new CommonRegex class. Furthermore, the user split tests into separate files for better organization and addressed issues related to the `Range` and `StartOfLine` methods, alongside correcting a minor error in the `CommonRegex.Url`. The user also addressed several testing related bugs.
kjellski/treehouse-simple-ror-app
Feb 2013 - May 2013
Contributions:37 commits in 3 months
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.