Portfolio & Case Studies

Professional projects showcasing expertise in cross-platform development, distributed systems, and mission-critical software engineering.

Featured Projects

Saveris Restaurant App
Testo SE & Co. KGaA
Cross-Platform Quality Management App

Mobile application for quality management and food safety compliance, used by restaurants and food service businesses globally.

Role:

Senior Software Developer

Key Responsibilities:

  • Developed cross-platform mobile app for iOS and Android using Qt Framework and C++20
  • Built custom Bluetooth communication framework for Testo measurement devices
  • Designed and implemented data layer architecture for device connectivity
  • Integrated testing frameworks and release automation

Technologies:

C++20Qt FrameworkCMakeConanGTestKotlinSwigJNIGradleCocoapodsAAB

Achievements:

  • Successfully deployed to both iOS App Store and Google Play Store
  • Achieved reliable Bluetooth connectivity with measurement devices
  • Implemented modular architecture for easy maintenance and scalability

Keywords: cross-platform mobile app, Qt developer, Bluetooth developer

IBM Spectrum Scale (GPFS)
IBM Deutschland Research & Development GmbH
Distributed File System Development

Component ownership and development for Spectrum Scale, IBM's high-performance clustered file system (formerly General Parallel File System - GPFS).

Role:

Software Developer & Component Owner

Key Responsibilities:

  • Component Owner for Clustered Configuration Repository (CCR)
  • Customer escalation handling and defect analysis
  • Story planning, implementation, and delivery
  • Performance optimization for distributed file operations

Technologies:

C++98BashLinux

Achievements:

  • Successfully resolved critical customer escalations
  • Improved system reliability and performance
  • Maintained component stability across major releases

Keywords: distributed systems, GPFS, cluster management, C++ engineer

Security Information Portal
IBM Deutschland Research & Development GmbH
Enterprise Security Web Platform

Full-stack development of a comprehensive web portal for exchanging security information and intelligence across the organization.

Role:

Software Developer & SCRUM Master

Key Responsibilities:

  • Full-stack development of security information exchange portal
  • Maintenance and development for Lotus Protector for Mail Security
  • SCRUM Master for X-Force Research Team
  • Containerized deployment using Kubernetes and Docker

Technologies:

C++BashPythonReactKubernetesDockerLinux

Achievements:

  • Delivered secure, scalable web platform for security teams
  • Led agile development practices as SCRUM Master
  • Successfully migrated to containerized infrastructure

Keywords: full-stack developer, security platform, enterprise software

Electronic Sector Manual
DFS - Deutsche Flugsicherung GmbH (Air Traffic Control)
Web-Based Aviation Software

Prototype development of a web-based Electronic Flight Bag for Air Traffic Controllers, focusing on reliable information management and user-driven design.

Role:

Application Developer (Master's Thesis Project)

Key Responsibilities:

  • Developed web-based Electronic Sector Manual with database connectivity
  • Evaluated automated generation through parametrization
  • Conducted user research and usability testing with air traffic controllers
  • Implemented responsive web interface with modern JavaScript frameworks

Technologies:

JavaScriptNode.jsEJSExpress.jsAngularJSMySQLMochaIstanbul

Achievements:

  • Thesis grade: 1.3 (excellent)
  • Successfully demonstrated prototype to air traffic controllers
  • Validated user-driven approach to safety-critical information systems

Keywords: aviation software, high-integrity systems, web engineering

SPEED-xWDM Configuration Tool
Pan Dacom Direkt GmbH
GUI Application for Network Systems

Desktop application with graphical user interface for configuration management of SPEED-xWDM fiber optic network systems.

Role:

Software Developer (Bachelor's Thesis Project)

Key Responsibilities:

  • Designed and developed GUI application using C++ and Qt Framework
  • Implemented hardware-oriented programming for glass fiber receivers
  • Evaluated software solution for initializing configuration parameters
  • Created intuitive interface for complex network device configuration

Technologies:

C++Qt FrameworkCATMELI2C

Achievements:

  • Thesis grade: 1.0 (highest possible grade)
  • Delivered production-ready configuration tool
  • Simplified complex hardware configuration processes

Keywords: Qt GUI developer, telecom software, configuration tool

Additional Experience

Mobile App Testing

NOLTE & LAUTH GmbH

Manual testing (black-box, ad hoc, stress, load, performance, regression, alpha, acceptance) for Mercedes Benz IAA presentation

Software Engineering Tutor

Frankfurt University of Applied Sciences

Developed and conducted 14+ practical exercises for 60+ students, reviewed 180+ exams

System Administration

QGroup GmbH

IT infrastructure realization and maintenance, customer support hotline