Stefan Zeller
Owner CTO at W21 GmbH
Switzerland
Summary
👤
Senior🎓
Top SchoolStefan Zeller is a pragmatic technology leader and Owner/CTO with two decades of hands-on experience delivering end-to-end software solutions and launching products with rapid time-to-market. Since 2014 he has operated as a freelance contractor and founder of W21 GmbH, specializing in tailored nearshoring architectures that enable fast onboarding, asynchronous team integration, and predictable delivery. He has repeatedly taken CTO roles at startups and SMEs, blending client-facing discovery with pragmatic engineering to turn ideas into production software quickly. Based in Switzerland, Stefan pairs deep client empathy and fast learning with proven delivery patterns—an approach that lets small teams punch above their weight and scale development velocity without sacrificing quality.
8 years of coding experience
7 years of employment as a software developer
Gymnasiale Maturität, Typus E, Gymnasiale Maturität, Typus E at Staatssekretariat für Bildung, Forschung und Innovation
English, German, French
Github Skills (13)
slave8
child-process6
event-emitter6
synchronous5
nodejs4
emitter4
replication4
mysql3
event-loop2
css1
inject1
fonts1
mariadb1
Programming languages (1)
Github contributions (4)
p80-ch/mysql-binlog-emitter
Mar 2018 - May 2018
A nodejs mysql/mariadb slave replication event emitter.
Contributions:20 commits, 9 pushes, 1 branch in 2 months
event-emittermysqlmariadb-mysqlnodejs-mysqlevent-loop
p80-ch/mysql-event-emitter
Mar 2018 - May 2018
Contributions:18 commits, 8 pushes, 1 branch in 2 months
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