Lennart Demes
North Rhine-Westphalia, Germany
Summary
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SeniorLennart Dommer is a freelance web developer with eight years of experience crafting bespoke web applications and process-optimizing software, primarily using PHP, Laravel (TALL stack), MySQL/MariaDB, and modern front-end tooling. Based in Georgsmarienhütte, Germany, he pairs pragmatic engineering with a productivity-focused workflow to deliver maintainable, efficient web apps tailored to client needs. He also contributes to open-source projects beyond PHP—most notably implementing and testing hue adjustment functionality in the Go image-processing repo disintegration/imaging—and created projects like ambientCG.com, AssetFetch and 3Dassets.one. Trained as an IHK-certified application developer and holding a BA in History and English/American Studies, he brings both technical rigor and clear communication to client engagements. He offers free initial consultations to scope projects and align technical solutions with business processes. His background in content-heavy and asset-oriented projects gives him an edge when building systems that integrate media, tooling and developer-friendly workflows.
9 years of coding experience
Github Skills (4)
image-processing10
go10
testing10
resize4
Programming languages (14)
Github contributions (5)
disintegration/imaging
Sep 2020 - Dec 2020
Imaging is a simple image processing package for Go
Role in this project:
Back-end Developer / QA Engineer
Back-end Developer / QA EngineerContributions:7 reviews, 10 commits, 1 PR in 2 months
Contributions summary:Lennart primarily focused on implementing and testing a hue adjustment function within the image processing package. They added the `AdjustHue` function, fixed an issue related to the shift value interpretation, and added comprehensive test cases to ensure its functionality across various scenarios. These contributions involved modifying existing code, writing new functions, and creating tests to validate the image processing operations.
goimage-processingimagingimagecrop
struffel/simple-deflicker
Aug 2020 - Apr 2022
A lightweight and easy to use tool for deflickering timelapse image sequences.
Contributions:2 releases, 118 commits, 15 PRs in 1 year 8 months
image-processingtimelapsetool-useimage-sequencestimelapse-photography
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