Career
- 1992 Abitur with advanced courses in mathematics and computer science at Oberzwehren High School (OSGO) in Kassel
- 1992 – 1997 Software developer and consultant, AIS Automations- und Informationssysteme GmbH, Kassel
- 1993 Graduation as a state-certified mathematical-technical assistant with a focus on programming technology at OSGO, practical part at AIS Automations- und Informationssysteme GmbH
- 1997 – 2000 Project manager, senior software developer, omp computer gmbh, Paderborn
- 1997 – today Consultant, AIS Automations- und Informationssysteme GmbH, now AG
- 2000 – 2007 System architect, head of development, authorized signatory, omp computer gmbh
- 2002 Diploma in Business Informatics, University of Paderborn (part-time)
- 2007 – today technical managing director, system architect, head of development, omp computer gmbh
- 2010 Doctor of Natural Sciences in Computer Science, Faculty of Electrical Engineering, Computer Science and Mathematics, Institute of Computer Science, Paderborn University (part-time)
- Lecturer at the FHDW since 2018
Research and consulting focus
- Architecture, implementation and validation of distributed telematics infrastructures: Virtualized servers on the central side, embedded, mobile software platforms in the field, heterogeneous networking with conventional protocols (TCP/IP, Ethernet) up to air interfaces (mobile radio, microwave)
- Safety, high integrity and reliability of software – from correctness by construction to simulation, H/SIL, field tests, software auditing and systematic operational monitoring
- UML, MDD, model transformation and validation, process algebras
- Ada, C, (MISRA) C++, C#, Java, Python, Rust, Go, Lisp, Assembler and other languages of various paradigms
- Definition, establishment and practice of development processes including programming guidelines, test methods and tool chains, waterfall to agile, continuous integration
- IT security: cryptography and cryptographic protocols, penetration tests and protection, Kali Linux, integration of HSMs, ISO 27001, BSI basic protection
Publications, public lectures and utility models
J. Stehr: Software + Safety: Dealing with (liability) risks in development processes. Embedded Engineering Talks, FH Bielefeld Campus Minden, September 2016.J. Stehr: Device for conformity and operational control of tolling equipment via mobile radio, DE202016105255U1. Utility model of omp telematics GmbH, September 2016.
J. Stehr: Device for the distribution and execution of encrypted programs, DE202016101111U1. Utility model of omp telematics GmbH, March 2016.
J. Stehr: Security and reliability of things on the Internet: How can software technology meet expectations and demands? OBJEKTspektrum, 01/2016.
J. Stehr: Device for the pseudonymization of tracking data (application title device for billing tolls), DE202015102311U1. Utility model of omp telematics GmbH, May 2015.
J. Stehr: Aspects of the reliability of mission-critical software. FHDW Business Forum, February 2015.
J. Stehr: Device for the secure execution of critical services in vehicles (application title Device for collecting a vehicle toll), DE202013011457U1. Utility model of omp telematics GmbH, April 2014.
J. Stehr: On the Design and Implementation of Reliable and Economical Telematics Software Architectures for Embedded Systems. A Domain-specific Framework. Heinz Nixdorf Institute Publishing Series, Volume 292, 2012.
M. Bevermeier, R. Häb-Umbach, S. Flake, J. Stehr: A Platform for Efficient Supply Chain Management Support in Logistics. 8th International Workshop on Intelligent Transportation, Hamburg, March 2011.
M. Bevermeier et al.: Wireless vehicle and cargo space monitoring for trucks using a toll on-board unit. DGON Navigation Convention 2009, Forum for research and application in the field of positioning and navigation, Berlin, July 2009.
J. Stehr: Model-driven development of tolling systems: Domain-specific aspects of traffic telematics. ObjektSPEKTRUM 04/2006.
J. Stehr: Development and test tools. Forum Industrie trifft Informatik, Heinz-Nixdorf-Institut, Paderborn, April 2006.
J. Stehr: Software metrics – measurable quality assurance. Forum Industrie trifft Informatik, Heinz-Nixdorf-Institut, Paderborn, November 2005.
J. Stehr: Requirements Management – Theory and Practice. Forum Industrie trifft Informatik, Heinz Nixdorf Institute, Paderborn, June 2005.
J. Stehr: Aspects of Mobile Telematics Applications and Services – A Framework for Requirements Analysis and Feasibility Evaluation. European Journal of Navigation, Vol. 1, No. 3, December 2003.
J. Küster, J. Stehr: Towards Explicit Behavioral Consistency Concepts in the UML. Proceedings of the 2nd International Workshop on Scenarios and State Machines: Models, Algorithms and Tools, International Conference on Software Engineering, Portland, USA, 2003.
J. Stehr: With the chip card to the Internet. Ostwestfälische Wirtschaft, Iss. 1/2000.
