Lauri Kotilainen
Software Consultant at Devisioona
Helsinki, Finland
Summary
👤
Senior🎓
Top SchoolLauri Kotilainen is a seasoned software consultant based in Helsinki with 11 years of experience specializing in .NET backend development, legacy code modernization, and performance tuning. He thrives on difficult problems—cleaning up legacy codebases and squeezing out performance —and has hands-on experience across cloud architectures, TypeScript frontends, and DevOps practices. Lauri contributes to notable open-source projects like SixLabors/ImageSharp and Volta, focusing on memory management, buffer allocation, and cross-platform CLI consistency, reflecting a pragmatic attention to efficiency and correctness. As a long-time consultant and occasional coach, he pairs deep technical troubleshooting skills with mentoring and client-facing delivery. Not obvious from the title: he routinely drives subtle performance improvements in core libraries, replacing common abstractions with bespoke memory strategies to gain measurable gains.
11 years of coding experience
9 years of employment as a software developer
BSc Computer Science, BSc Computer Science at University of Helsinki
English, Swedish, Finnish
Github Skills (23)
image-processing10
css10
net10
memory-management10
dotnet10
graphic10
asp-net10
parse10
dotnet-core10
netcore10
nodejs10
package-manager10
csharp10
data-structure9
data-structures9
Programming languages (9)
Github contributions (5)
dotless/dotless
Feb 2015 - May 2017
.NET Port of the ruby Less CSS lib
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 225 commits, 38 PRs in 2 years 3 months
Contributions summary:Lauri primarily focused on enhancing the parsing capabilities of the dotless project, a .NET port of the Less CSS library. Their contributions included implementing support for features like variable interpolation in property names, parsing rulesets within imports, supporting default guards, and properly evaluating mixin calls and shorthand properties. The code changes indicate a focus on improving the accuracy and completeness of the CSS parsing and rendering functionality.
cssless-cssruby
SixLabors/ImageSharp
Jan 2018 - Jan 2018
:camera: A modern, cross-platform, 2D Graphics library for .NET
Role in this project:Back-end Developer
Back-end DeveloperContributions:40 commits, 1 PR, 8 comments in 2 days
Contributions summary:Lauri made several code changes focused on memory management and buffer allocation within the `sixlabors/imagesharp` repository. These changes included the use of a custom memory manager and refactoring code to allocate buffers from the memory manager. The commits show a focus on performance by replacing `ArrayPool` usages with alternatives. Additionally, the user contributed to changes related to how image data is stored and processed.
bmpvulkancamerac-sharpjpeg
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