2002 - today, PAYBACK GmbH, Munich
Data driven problem solving (in R)

• Logfiles and JMX data of Java springboot microservices and Oracle Weblogic
• Logfiles and Servermanager in Oracle Siebel
• Oracle database workload repository and session history
• Linux: sar, lsof, process and socket stats; ebpf coming soon
• Networks: Netflow and SNMP Data, PCAP/tcpdumps
• Fraud Analysis

• Built up a QA department (10 employees) from scratch; head of department
• Design and construction of test networks (hard- and software)
• Development of complex test scenarios with emphasis in the areas security and performance for access management software in
  • heterogenous enterprise networks (WinNT/2000, Solaris, AIX, HP/UX, Sinix-Z)
  • web server parcs (webserver, J2EE-applicationsserver, directory services, database systems, packet filters and proxies)
• Introducing quality control (reviews, guidelines, coaching) for software development
• Head of automated test development (Java/J2EE, JUnit/HTTPUnit, various scripting languages)
• Organisation and execution of internal acceptance tests, release responsibility
• Organisation and execution of pilot installations and customer tests
• Advisor for all departments regarding security, network and web technology as well as methods for quality control and quality assurance
• Responsible for customer audits (e. g. TMap/TIP test process audits)

• Main organisation of the project Shape optimization for turbine and compressor blades
• Requirement analysis in collaboration with the industry partners ABB Kraftwarke AG Baden (CH) and Motoren- and Turbinenunion (MTU) München
• Implementation and adaptation of the optimization methods developed at IWR to the design software used by the industry partners
• Development of test cases in collaboration with the industry partners, software integraton and pilot installation for the partner enterprises
• Project presentation for the research effort Arbeitsgemeinschaft Hochtemperatur-Gasturbine (BMBF) and for the partner enterprises
• Publication of the results
• Teaching (lectures, seminars) at the University of Heidelberg
• Coordination of research group presentations

• Feasibility analysis of physical models for the investigation of fuel properties in fuel injection pipes and orifices by means of measurements and numerical simulation
• Parameter estimation for PDEs software development
• Publications

• Implementation of special nonlinear constrained optimization methods for parameter estimation in boundary value problems
• Evaluation of the results for research purposes

• Application of nonlinear parameter estimation methods to the development of physical models for fuel injection systems (diesel, dimethyl ether)

• Investigation of special nonlinear constrained optimization methods and their application to differential equations