Markus Siering
Senior Frontend Developer at Whiskey Tango Foxtrot GmbH
Hamburg, Germany
Summary
👤
Senior🎓
Top SchoolMarkus Siering is a Senior Frontend Developer with 12 years of experience building polished, scalable user interfaces and design systems across startups and established product teams in Hamburg. He has led UI architecture and development teams at sum.cumo and XING, and most recently focused his frontend expertise on ClimateTech at zolar and now Whiskey Tango Foxtrot GmbH. Markus combines hands-on engineering with team leadership, having moved from template and product-focused roles at Jimdo to shaping cross-team design systems and cloud PaaS projects. He brings a communicator’s background (Magister Artium in Communication Science) that strengthens stakeholder collaboration and product thinking beyond pure code. Notably, he deliberately steered his career toward climate impact, applying frontend craft to renewable energy and sustainability-focused products.
12 years of coding experience
11 years of employment as a software developer
Magister Artium Communication Science, Magister Artium Communication Science at University of Münster
English, German
Stackoverflow
118reputation
7kreached
7answers
2questions
Github Skills (200)
amazon-cognito10
ui-components10
testing10
automation10
isolation10
pouchdb10
html10
google-maps-javascript-api10
cloud-services10
vagrant10
storybook-addon10
static-site-generator10
semantic-html10
full-stack10
ssg10
Programming languages (18)
Github contributions (5)
HerrBertling/virtualsupporttalks
May 2020 - Feb 2023
Website for REDEZEIT FÜR DICH
Contributions:39 reviews, 277 commits, 146 PRs in 2 years 8 months
HerrBertling/herrsiering.de
Aug 2018 - Feb 2025
My personal website
Contributions:455 PRs, 498 pushes, 441 branches in 6 years 6 months
reactnextjs
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