As the founder and lead developer at memodio, I am driving the development of a certified medical product focused on dementia-prevention. Besides the ongoing development, I oversee the entire app product lifecycle, including leading a talented team of four and managing end-to-end infrastructure.- Develop the core functionality of the app product, utilizing cutting-edge technologies such as Node.js, Flutter, Vue.js, and TypeScript.- Implement stringent security measures and robust data protection protocols to ensure the highest standards of confidentiality and privacy for our medical app users.- Architect a scalable and secure infrastructure, enabling efficient deployment and horizontal scaling.- Implement science-based video-based therapy and interactive exercises to engage users and promote cognitive health.- Collaborate closely with medical professionals and researchers to ensure our app aligns with the latest advancements in dementia prevention strategies.

Improved capabilities of legacy-system SelfSurvey. Managed and enhanced a dated PHP codebase for a project focused on creating and conducting surveys. The platform utilized prediction techniques to provide participants with detailed and actionable feedback based on their survey responses.- Improved the PHP codebase by adding newest language-concepts, handling large code refactorings to improve maintainability and performance, resulting in fewer bugs- Resolved technical issues and optimized the database structure for improved data storage and retrieval efficiency.- Contributed to the development of a robust and scalable architecture, ensuring the stability and availability of the platform.

Developed software product edudoc, a digital platform where medical doctors could find courses for their continuous medical education (CME). This platform provided doctors with user-friendly interface to search for and access relevant courses. - Led the end-to-end development of the web application using Node.js and Vue.js, ensuring efficient performance and an intuitive user experience.- Implemented a geospatial indexing and search system using MongoDB's geospatial queries, resulting in 220% speed optimization and better user-retention- Created Frontend in Vue.js and nuxt, resulting in quick pageload times and high SEO scores(within months top-ranking for several SEO articles)- Leveraged AWS to host the application, handling the full infrastructure-setup and maintenance.- Highly involved in company-strategy and product management

Contributed to the "Unit Testing for Machine Learning" project at Amazon Germany. Engaged in software development activities, utilizing a range of cutting-edge technologies including AWS Redshift, Apache Spark, relational DBMS, Python, scikit-learn- Worked open-source project Deequ, to extend a scalable "unit testing"-like framework for large datasets used for machine learning pipelines.- Improved upon adapters for JDBC and Apache spark to make system usable on distributed clusters as well as regular DBMS.- Utilized Python and scikit-learn for data preparation and cleaning.

Built the web application "täglichtippen" where users could play a free game of luck to win small monetary rewards. Users needed to watch short ads to submit their bet for a daily raffle.- Led technical direction and establishment from MVP to live product with several thousand WAU.- Prioritized a seamless mobile experience, resulting in high user retention and engagement.- Utilized React.js for the frontend and Node.js for the backend, integrating MongoDB for efficient data management.- Hosting of infrastructure on Heroku, ensuring reliable performance and scalability.

Contributed to full-stack web development at Synfioo GmbH, a logistics technology Start-Up, mainly on their live-Map and freight-tracking application. - Developed and maintained a single-page web application (SPA) using Vue.js & JavsScript, integrating map functionalities with Here Maps and Leaflet- Route calculations and ETA predictions in the node.js Backend- Collaborated in cross-functional team to gather requirements and deliver solutions aligned with business objectives- Ensured high-quality code through testing and debugging processes