Jan Zimmek
Full-Stack Developer Coach at Jan Zimmek
Berlin Metropolitan Area Germany
Summary
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RockstarJan Zimmek is a Full-Stack Developer Coach based in the Berlin area with 17 years of hands-on experience building and leading web and product teams. He combines deep technical craftsmanship—from J2EE architecture to modern full-stack development—with entrepreneurial experience as founder or CTO of multiple startups including FeedbackJoy, Patience.io, Lokalleads and rabbitholez. Jan has led engineering and product efforts across roles that span senior consultant to CTO, consistently turning customer feedback into actionable product improvements. He currently runs his own practice, pairing coaching with hands-on development to help teams ship reliable, user-focused software. Colleagues describe him as a pragmatic builder who bridges strategy and execution, comfortable both mentoring developers and shipping production systems. Based in Berlin, he brings a founder’s mindset to engineering leadership and product discovery.
17 years of coding experience
11 years of employment as a software developer
English, German
Github Skills (156)
react-redux10
styled-components10
automation10
infrastructure10
form-validation10
javascript10
recycle10
scale10
api10
react-hooks10
typescript10
prisma10
redux-form10
graphql-js10
nodejs10
Programming languages (7)
Github contributions (5)
jzimmek/graphql-pg
Feb 2017 - Jun 2017
Contributions:54 pushes, 2 branches, 1 tag in 3 months
queryarbitrarystatementpg-graphqlgraphql
jzimmek/serverless-plugin-node-shim
Feb 2018 - Feb 2018
Contributions:13 commits, 8 pushes, 1 branch in 2 days
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