Stefan Osorio
Main Trainer React Native
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolStefan Osorio is a Berlin-based web developer with 10 years of experience who combines front-end expertise—now focused on React Native training—with a marketing background and a keen passion for UX and pragmatic design. He has shipped production web apps across startups and scale-ups (plus B, Rasa) and now leads training at SuperCode, translating complex concepts into effective developer learning. Stefan contributes to open-source backend tooling as well, improving core Elixir libraries like faker’s date handling, showing comfort across stacks from UI to server-side utilities. His mix of analytics-driven marketing experience (CRO, A/B testing, web analytics) and formal UX training enables him to bridge product, design, and engineering in ways that improve both conversion and developer experience.
10 years of coding experience
6 years of employment as a software developer
Computer Science, Computer Science at Freie Universität BerlinCertified UX Design User Experience, Certified UX Design User Experience at CareerFoundry
German, English, French, Spanish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (13)
testkit10
faker10
mstest10
teste10
ui-testing10
elixir10
testing10
price-data9
data-model9
data-set9
generator8
databases8
database8
Programming languages (7)
Github contributions (5)
elixirs/faker
Oct 2017 - Oct 2017
Faker is a pure Elixir library for generating fake data.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 commits, 1 PR, 3 comments in 2 days
Contributions summary:Stefan focused on improving the `Faker.Date` module, a core component of the Elixir library for generating fake data. Their contributions included refactoring the `date_of_birth` function for greater date coverage, adapting code to utilize the new function, and correcting an age function within tests. Additionally, the user improved code readability and removed unnecessary whitespace.
datadeveloper-toolsfakergeneratortesting-tools
stosorio/keystone
Jul 2015 - Sep 2015
Contributions:7 pushes in 1 month
cmsmysqlnode-jsjavascriptnodejs
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