Simon Hänisch
Senior Software Engineer at Klarna
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolSimon Hänisch is a Senior Software Engineer based in Berlin with 11 years of experience building full‑stack web applications and developer tooling, currently shaping Klarna’s internal engineering platform to streamline service creation. Trained in automotive software (M.Sc.), he brings systems thinking from real‑time image processing and embedded tooling into web-scale problems, often favoring progressive web apps, web components and TypeScript. He has led frontend teams, mentored juniors, and scaled a solo freelance practice into a small business while keeping hands-on contributions to notable open-source projects like Ionic and Stencil. His open‑source work ranges from UI component improvements to developer tooling and a hackable md-to-pdf CLI that upgrades Markdown workflows with headless Chrome and customizable styling—illustrating a blend of UX sensitivity and pragmatic engineering. Colleagues describe him as driven by learning, maximizing impact, and making complex developer experiences simpler.
11 years of coding experience
9 years of employment as a software developer
Master of Science - MS Automotive Software, Master of Science - MS Automotive Software at Technische Universität BerlinBachelor of Engineering - BE Vehicle Engineering, Bachelor of Engineering - BE Vehicle Engineering at Hochschule für Technik und Wirtschaft Berlin
German, English
Stackoverflow
4,875reputation
2.0mreached
128answers
3questions
javascript
top-5%
opencv
top-5%
Github Skills (32)
markdown10
ionice10
puppeteer10
javascript10
css10
typescript10
web-components10
stencil10
ionic10
chromeless10
headless-browser10
markdown-it10
rollupjs10
typescript-types10
custom-element10
Programming languages (17)
Github contributions (5)
simonhaenisch/md-to-pdf
May 2017 - Jan 2023
Hackable CLI tool for converting Markdown files to PDF using Node.js and headless Chrome.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:37 releases, 33 reviews, 380 commits in 5 years 9 months
Contributions summary:Simon primarily focused on enhancing the functionality of a Markdown to PDF conversion tool. They implemented support for relative image paths, improved styling of blockquotes and code blocks, and added the ability to inject custom CSS. Further contributions included refactoring the code, introducing a configuration file, and upgrading the tool to use a headless browser for the PDF generation, improving the reliability and flexibility of the tool. They also made changes to the UI styling.
headlessmarkdown-to-pdfpdfnode-jspuppeteer
stenciljs/core
Jan 2019 - Mar 2021
A toolchain for building scalable, enterprise-ready component systems on top of TypeScript and Web Component standards. Stencil components can be distributed natively to React, Angular, Vue, and traditional web developers from a single, framework-agnostic codebase.
Role in this project:Front-end Developer
Front-end DeveloperContributions:5 reviews, 31 commits, 40 PRs in 2 years 2 months
Contributions summary:Simon primarily contributed to the StencilJS core repository by implementing and modifying front-end components and related tooling. Their work involved updating and configuring Rollup, a module bundler crucial for the project's build process, and resolving issues related to TypeScript imports. Additionally, the user added media event-handler properties to JSX and addressed issues related to the dev server and component generation. Their contributions focused on improving the developer experience and fixing bugs.
ssgagnosticvueon-topcodebase
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