Nils Knappmeier
Full Stack Engineer at cosee GmbH
Darmstadt, Hesse, Germany
Summary
🤩
Rockstar🎓
Top SchoolNils Knappmeier is a Full Stack Engineer based in Darmstadt, Germany, with 14 years of experience building reliable web applications and services. He combines a strong Java backend background with Node.js and front-end expertise, and currently drives full-stack delivery at cosee GmbH after a long tenure at intelligent views. An active open-source contributor, Nils has improved Handlebars templating and enhanced syntax highlighting in the widely used highlight.js project—adding Handlebars grammar support, bug fixes, and developer tooling for parsed code visualization. He brings a pragmatic, detail-oriented approach to parsing and templating edge cases (e.g., raw blocks and prototype property handling), which often surfaces in subtle production bugs. Trained as a Diplom-Informatiker at Technische Universität Darmstadt, he mixes academic rigor with practical, hands-on engineering.
14 years of coding experience
12 years of employment as a software developer
Technischen Universität Darmstadt
Stackoverflow
654reputation
214kreached
4answers
2questions
yaml
top-5%
swagger
top-5%
Github Skills (19)
javascript10
handlebars10
testing10
grammars10
syntax-highlighting10
templating10
swagger9
yaml9
xhtml9
html9
xml9
swagger-editor6
haproxy6
swagger-php6
rpm6
Programming languages (12)
Github contributions (5)
handlebars-lang/handlebars.js
Oct 2015 - Jun 2022
Minimal templating on steroids.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:21 reviews, 344 commits, 167 PRs in 6 years 8 months
Contributions summary:Nils's commits primarily focus on improving the Handlebars.js templating library by addressing bugs and implementing new features. Their work involved bug fixes related to the handling of prototype properties within templates and issues with raw block parsing. They also contributed to improving functionality with changes to the `lookup` and `each` helpers, including improvements to error handling.
template-enginetemplatetemplatingmustachesteroids
highlightjs/highlight.js
Feb 2017 - May 2020
JavaScript syntax highlighter with language auto-detection and zero dependencies.
Role in this project:Front-end Developer
Front-end DeveloperContributions:7 commits, 11 PRs, 102 comments in 3 years 3 months
Contributions summary:Nils primarily contributed to the Handlebars language syntax highlighting within the highlight.js library. They implemented support for features like raw blocks, triple mustaches, sub-expressions, path-expressions, hashes, block-parameters, and literals, improving the library's parsing capabilities. Furthermore, they addressed bug fixes related to the output, such as omitting empty span tags, and added developer tools for visualizing the parsed code structure. Their work also involved refactoring the codebase, deprecated the `htmlbars` grammar and improved the general functionality of the syntax highlighter.
dependencieshighlightzerosyntax-highlighterjavascript-syntax
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