Fernando Cejas
DevEx Engineering Lead at Promon
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolFernando Cejas is a DevEx engineering lead and seasoned software leader with 14 years of experience building developer-facing platforms, mobile frameworks, and engineering teams across startups and large enterprises. Based in Berlin, he has led mobile and developer-experience efforts at Promon, Wire, SoundCloud and IBM, combining hands-on Android engineering with strategic leadership and P&L responsibilities. An active open-source contributor and organizer (notably on Android clean-architecture samples and libraries used widely by the community), he brings deep expertise in architecture, CI/CD, and developer tooling. He’s also explored quantum computing and quantum ML tooling in production research roles, blending classical and emerging paradigms. Known for mentoring teams, driving modularization of client platforms, and shipping reusable frameworks, he pairs entrepreneurial grit from multiple co-founder roles with a persistent focus on code quality and testability.
14 years of coding experience
17 years of employment as a software developer
Technical Developer, Pontifical Catholic University of ArgentinaSystems Analist, Pontifical Catholic University of ArgentinaDegree in Computer Systems IT, Degree in Computer Systems IT at Universidad Católica de Santa Fe
Spanish, English, German, English, Spanish, German
Stackoverflow
33reputation
2kreached
2answers
1question
Github Skills (35)
kotlin10
unit-testing10
bash10
ui-design10
android-development10
java10
android-developer10
javas10
android10
android-developers10
shell10
mockito10
rxjavafx9
user-interface9
mvvm9
Programming languages (15)
Github contributions (5)
android10/Android-CleanArchitecture-Kotlin
Apr 2017 - Feb 2022
This is a movies sample app in Kotlin, which is part of a serie of blog posts I have written about architecting android application using different approaches.
Role in this project:
Mobile Developer (Android)
Mobile Developer (Android)Contributions:9 reviews, 281 commits, 26 PRs in 4 years 11 months
Contributions summary:Fernando primarily contributed to the development of the Android application, introducing and modifying core components such as the main and login screens, and movie-related features. Their work involved the implementation of UI elements, navigation, and the integration of architectural components like ViewModels, as well as the use of Hilt for dependency injection. The user also worked on adapting the user interface and functionality.
android-applicationkotlinandroidarchitecturallessons-learned
android10/Android-CleanArchitecture
Aug 2014 - Dec 2020
This is a sample app that is part of a series of blog posts I have written about how to architect an android application using Uncle Bob's clean architecture approach.
Role in this project:Mobile Developer (Android)
Mobile Developer (Android)Contributions:1 review, 244 commits, 32 PRs in 6 years 5 months
Contributions summary:Fernando's contributions focused on the Android application's presentation layer. They initialized the main activity, integrated fragments, and added UI components, including a RecyclerView for displaying user data. Furthermore, the user implemented navigation between activities, and addressed error handling within the presentation layer, showcasing their work on the application's user interface and core functionality.
android-applicationandroid-cleanarchitecturearchitecturaljavaandroid
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