Johannes Haberlah

- Designed, independently developed and launched a scalable push notification service for ZDF, triggering push notifications for a streaming platform with more than 200 million monthly visits (TypeScript, Node.js) - Designed, independently developed and launched the new backend system for the ZDFtivi native apps, supporting a user base indicated by over 1 million app downloads (Kotlin, Spring Boot) - Developed a new booking service for TUI Cruises (PHP, Symfony); maintained existing core backend services

- Consulting small businesses on how to use Google Ads to accelerate their growth; managed over $250K of annual budget alongside school - Designed, developed, launched, and maintained a microservice-based course platform for medical course providers, managing the complete project lifecycle as a freelancer - Designed, developed, launched and maintained an online platform (booking, management, planning) for a German health course provider (Java, Spring Boot); consulting about process optimization

- Designed & developed a VideoChat client application for large car dealerships, managing the full project lifecycle (C#, Google Firebase Realtime) - Developed a prototype of a platform leveraging AI (Google Cloud AutoML) to automatically generate videos for used car listings, closely working together with the largest German car dealerships (Java, Python)

- Independently developed a comprehensive company-wide style guide to standardize object-oriented coding practices - Collaborated on the development of a major CRM software system (C#, .NET) - Independently designed, developed, and deployed an internal task management platform (PHP, HTML, CSS) - Analyzed and profiled the performance of multiple database management systems (MS-SQL, MySQL, MariaDB) - Independently maintained a critical internal time tracking tool (C#, WPF, SQL)