Marcus Blättermann
Co-CTO at Stealth Startup
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolMarcus Blättermann is a Berlin-based Co-CTO and product-minded software leader with 10 years of experience shipping front-end and architecture solutions across startups and engineering teams. He progressed from founder and UX/front-end roles to lead developer and software architect, blending design-led thinking from his MA in Editorial Design with pragmatic engineering. At Explosion he contributed front-end and accessibility improvements to spaCy's public website, enhancing UX and SEO for one of the most widely used open-source NLP projects. Marcus excels at bridging design and engineering—refining interfaces, accessibility, and developer-facing components while driving technical strategy at early-stage ventures. He brings a hands-on approach to building polished UIs and scalable systems, and quietly favors small, high-impact improvements (like accessibility fixes and component refactors) that compound over time.
10 years of coding experience
16 years of employment as a software developer
Master of Arts (MA), Editorial Design, Master of Arts (MA), Editorial Design at Burg Giebichenstein - Hochschule für Kunst und Design Halle
German, English
Stackoverflow
135reputation
741reached
1answer
2questions
Github Skills (15)
javascript10
react10
html9
nextjs9
sass9
user-interface8
accessibility8
website-development7
website-design7
pure-function6
design-patterns6
functional-programming6
prototypes6
software-design6
inheritance6
Programming languages (6)
Github contributions (5)
explosion/spaCy
Sep 2022 - Jan 2023
💫 Industrial-strength Natural Language Processing (NLP) in Python
Role in this project:
Front-end Developer
Front-end DeveloperContributions:12 reviews, 50 commits, 41 PRs in 4 months
Contributions summary:Marcus primarily contributed to the website's front-end, focusing on user interface improvements and accessibility enhancements. Their commits included fixing broken social media images, replacing image file types, and adding missing alt tags to images, enhancing the visual presentation and SEO of the website. They also addressed accessibility issues by removing zoom locking and adding aria labels, ensuring a better user experience. The user also refactored and improved existing components like the GitHub badge.
fairness-mlpythondata-preprocessinglanguage-processingtokenization
essenmitsosse/resolution-independent-graphics
Sep 2016 - Sep 2016
Contributions:43 commits, 26 pushes, 1 branch in 17 days
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