IT Security, High Availability, Telecommunication, VoIP

The Common Network Technology Database is the distributed and replicated repository for many Telekom's national mobile networks supplying subscriber information to practically all network components (HLR, AuC, HSS, TAS, etc.).

Tasks and Reponsibilities:

• data modelling the used LDAP schema that is continuously being developped further
• software design and prototyping of provisioning gateway modules
• review of design / concepts of peer designers within the team

Solution design to integrate a software for "Privileged User Access Management" (PUAM) in operations departments of Vodafone (mobile and fixed) and Kabel Deutschland including connection to Security Information and Event Management (SIEM), monitoring, Identity Management (IdM)

• create a system inventory with roles, responsibilities and methods related to Identity and Access Management (IAM) in collaboration with system owners
• analyze the existing authentication and authorization methods
• create a roadmap for consolidation according to audit recommendations
• introduce a process for periodic review of user permissions (reconciliation & certification) and initial execution in collaboration with system owners
• evaluate an open source password safe software for privileged accounts for security flaws

• system architecture incl. selection of suitable components and technologies
• API definition for the mobile application (iOS, Android)
• setup and management of the test system using virtualization technology
• configuration of open source software (Kamailio Routing, Asterisk dialplan, MySQL cluster) incl. high availability
• software development JEE backend API layer for mobile App
• close collaboration with operations team for putting QA and production systems into service
• close collaboration with customer support for end-to-end fault analysis

• planning and execution of the software development process according to the aviation quality standard DO-178B
• close collaboration with end client's product management (requirements analysis) and engineering (system requirements and technical solution, systems integration in Dublin)
• coordination of the TriaGnoSys software development team (3 persons)
• software development and tests of some components
• release responsibility towards end client

• analysis of the current state of the three email systems (VF mobile, VF DSL, arcor.de)
• definition of a software architecture to interconnect the outsourced email platform with the internal IT system
• requirements analysis for new email platform (together with technical project team)
• contributions to request for proposal and request for quotation for IT service providers (together with technical project team, marketing, operations) and participation in workshops with IT service providers
• create proposals for "quick wins" to stabilize VF mobile mail platform
• analysis of the current situation of the web portal "OfficeNet"
• requirements analysis for feature updated for "MyVodafone" portal together with specialist department

Adaptation and development of a wireless Internet access point for aircraft with

• portal, billing
• Voice over IP (VoIP)
• satellite modem control (Inmarsat Swift Broadband SBB)

• support the software development team with software architecture and design
• support the development team with introducing and applying agile development methodologies and processes (Scrum)
• assure software deliveries within agreed time and quality
• identify and manage dependencies, risks and problems influencing software deliveries on all layers (technical as well as organizational)
• support the Product Owner with spring and roadmap planning
• promote agile development methodologies within a more traditional / waterfall style project management environment

Development of a wireless Internet access point for aircraft with

• portal
• billing (PCI-DSS certification on aircraft)
• Voice over IP (VoIP)
• satellite modem control (Inmarsat Swift Broadband SBB)

• IMAP Server
• Core Anti-Spam Modules
• Email Filters