Christian Tietze
Founder AI-Assisted Development Für Engineering-Teams at Shiny Frog
Bielefeld, North Rhine-Westphalia, Germany
Summary
🤩
Rockstar🎓
Top SchoolChristian Tietze is a seasoned macOS and iOS developer with 17 years of experience who now helps engineering teams adopt AI-assisted development as founder of SHIFT to AI. He combines deep platform expertise—contributing to notable open-source projects like the xi-editor frontends and ReSwift—with practical product work on apps such as Timing and a secret text editor at Shiny Frog. Christian is fluent in building event-driven architectures, refining developer tooling, and shipping thoughtful UI/UX improvements, often focusing on asynchronous dispatch and robust refactors. He teaches and builds tools to boost knowledge workers’ productivity, drawing on a background in philosophy and computer science to communicate complex ideas clearly. Pragmatic and detail-oriented, he prefers coaching and rules-based adoption over flashy demos when introducing Codex/Claude into teams.
17 years of coding experience
5 years of employment as a software developer
Bachelor's Degree, Philosophy & Computer Sciences, Bachelor's Degree, Philosophy & Computer Sciences at Bielefeld UniversityEvangelisch-Stiftisches Gymnasium Gütersloh
English, German
Stackoverflow
2,855reputation
355kreached
81answers
21questions
firebase
top-5%
firebase-realtime-database
top-5%
ios
top-5%
Github Skills (47)
user-preferences10
parserator10
uitest10
uitextview10
libgit210
ios10
parser10
api-design10
testing10
event-driven-architecture10
swiftui-app10
user-interface10
graphical-user-interface10
preference10
xctest10
Programming languages (30)
Github contributions (5)
swiftcsv/SwiftCSV
Oct 2016 - Aug 2022
CSV parser for Swift
Role in this project:
Backend Developer
Backend DeveloperContributions:11 releases, 32 reviews, 58 commits in 5 years 10 months
Contributions summary:Christian primarily focused on improving the SwiftCSV library by refactoring and enhancing its core functionality. They introduced Swift 3, 4.2, and 5 support through code updates and project setting adjustments. The user implemented improvements to enumeration and error handling, including the introduction of a delimiter-guessing feature, alongside refactoring internal methods and tests. They also addressed edge cases and ensured proper handling of various data formats, resulting in more robust CSV parsing capabilities.
csvtsvmacswiftios
ReSwift/ReSwift
Jan 2016 - Jan 2023
Unidirectional Data Flow in Swift - Inspired by Redux
Role in this project:Back-end Developer
Back-end DeveloperContributions:4 releases, 19 reviews, 61 commits in 7 years
Contributions summary:Christian primarily focused on modifying the ReSwift core functionality and tests. Their contributions included renaming and refactoring code related to subscriptions within the store. They added and modified tests to improve coverage and address issues like state updates and skipRepeats, demonstrating a strong understanding of the library's internal mechanisms. They also contributed to improving the test framework by adding test fakes and reducer logic.
unidirectional-data-flowreswiftunidirectionalswiftredux
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