Tech Lead / Senior Android Software Architect

• Jan 2023 - Present

Mobile Application Developer

• Mar 2020 - Dec 2022

• Developed major features of a B2C shop and a validity checker for James, mobile travel guide apps used by major European tourism regions, on iOS, Android, and Kotlin Multiplatform in coordination with project managers, API and design teams • Integrating Skiline and James apps by modularizing code to provide digital entertainment and create one of the largest digital marketplaces for over 700.000 users to sell touristic products in the alps. • Developed major features of a B2C shop and a validity checker for James, mobile travel guide apps used by major European tourism regions, on iOS, Android, and Kotlin Multiplatform in coordination with project managers, API and design teams • Integrating Skiline and James apps by modularizing code to provide digital entertainment and create one of the largest digital marketplaces for over 700.000 users to sell touristic products in the alps.

Professional IT-Consultant

• Jul 2013 - Feb 2020

• Created object-oriented APIs of future proALPHA version 8.2 with focus on Domain-Driven-Design and Design Patterns to improve maintainability and stability • Coordinated a software update project of a big and long-term (20+ years) customer across a team of 12 developers with close customer contact and > 200 days effort, thereby redesigned solutions with modern technical concepts and design patterns • Designed and developed BI Dashboards for a big company merger with more than 22.500 employees harmonizing reporting with a financial and a logistics Cockpit. • Created reusable and profound interfaces between proALPHA and external accounting systems (BMD) and EDI converters via Web Services (ecosio). Show less

Android Team Coordinator | Developer at Android, iOS and Web Teams

• 2011 - 2018

• Contributed major code parts to the "Pocket Code" app in Android (2.500.000+ downloads worldwide) as a senior developer, iOS and Web with more than 500 git commits. • Introduced flavoring to Pocket Code as part of the EU-founded "No One Left Behind" project, allowing optional additions such as complex template projects downloaded via Web Service. • Built Web 2.0 functionality into Pocket Code (Android & iOS), including social sign-in with server-side authentication flow, automated Facebook channel posts, and social sharing. • Created a standalone app made of a single Pocket Code program (Tic-Tac-Toe Master), which has 50.000+ installs on Google Play. • Added complex features such as a backpack or user-defined bricks, built various design patterns into Pocket Code and improved performance substantially in the broadcast system. Show less

Google Summer of Code | Student, Mentor and Project Coordinator

• 2013 - 2016

• Participated at Google Summer of Code for Catrobat as student, mentor and project coordinator from 2013 to 2016. • Implemented and mentored major features for Pocket Code (Android version) as student and mentor, including a backpack, object grouping in a dynamic ListView and an APK generator. • Managed 7 cross-platform Google Summer of Code teams throughout the program as project coordinator. • Participated at Google Summer of Code for Catrobat as student, mentor and project coordinator from 2013 to 2016. • Implemented and mentored major features for Pocket Code (Android version) as student and mentor, including a backpack, object grouping in a dynamic ListView and an APK generator. • Managed 7 cross-platform Google Summer of Code teams throughout the program as project coordinator.

Internship

• Mar 2011 - Aug 2011

• Supported the Bosch Purchasing department in daily operations and logistics cost inspections. • Supported the Bosch Purchasing department in daily operations and logistics cost inspections.