Daniel Berg Email & Phone Number

Essen, Nrw, De

Bochum, Nrw, De

Berlin, Germany

• Developed and maintained backend systems for B2B electric vehicle software, supporting fleet transitions from combustion to electric. I focused on building scalable, reliable systems with continuous feature improvements. • Expanded the platform to support e-truck fleet management by designing truck-specific features, creating scalable data migration processes, and integrating cloud image storage. This opened new revenue streams and strengthened the company’s market position. • Integrated vehicle data for total cost of ownership (TCO) calculations by incorporating a third-party API. Despite cryptic errors and poor documentation, I optimized error handling and reduced redundant API calls, resulting in significant operational savings and improved system efficiency.

Bochum Area, Germany

• Reduced technical debt and modernized Germany’s largest apprenticeship platform by refactoring legacy code and transitioning outdated Rails components into a microservices architecture. This effort improved scalability and system performance, ensuring better maintainability and backend reliability.• Developed a medical administration system for a provider of dental and general medical software, implementing secure patient data management, encryption, and workflows for processing video, audio, images and text, along with customizable PDF exports for efficient document management.• Built a data metrics platform for an ad-based video content company, focusing on processing and visualizing data to track user engagement, ad performance, and demographic targeting. These insights helped drive data-driven advertising decisions.

Witten

• Integrated a new model of footfall counting sensors into the company’s PHP-based cloud interface. This involved troubleshooting connection and technical issues with the sensors before starting on the interface integration, ensuring seamless data flow of key metrics for global retail clients.• Worked on migration to OpenShift/Docker infrastructure, significantly improving the development lifecycle, system scalability, and team productivity.• Led the development of a data import preview module that optimized the parsing, display, display, and storage of raw customer metadata. This tool reduced errors and increased developer productivity by 5% annually.