Senior Software Developer

• Jun 2022 - Present

Senior Software Developer

• Jun 2022 - Present

Billing Consultant, Senior Developer

• Oct 2018 - Jun 2022

Billing Consultant, Senior Developer

• Oct 2018 - Jun 2022

As a Billing Consultant and Senior Developer I'm working in an agile Scrum/DevOps team on Bechtle Clouds' RBM based billing system. Bechtle Clouds is a cloud services reseller with license (MS, Adobe, Cisco, Google etc) and usage based (Azure, AWS, GCP, Ionos etc) products in their portfolio. The endcustomers are mostly mid- and large companies from both the private and public sector. My responsibilities are: - Development of the integration layer between other Bechtle systems and the billing system. (Spring Boot, Java, Oracle SQL, Liquibase, Shell, Python) - Rating/Billing configuration: configuration of new license and usage based products, tariffs, event types with pre and postpaid options in different currencies. - Support the business analyst team: analysing billing related topics, documenting the analysis results in order to help decision making, the creation of user stories (Jira, Confluence, Wiki) and software design. - Development of Web Applications for supporting Finance/Controlling (Spring Boot, Java, Vaadin, Docker, Openshift) - Operational tasks: daily operational activities, billrun execution, analysing domain and technical problems, performance issues, bottlenecks. - 3rd level support: analysing and solving customer complaints, incidents, problems. Major tasks and achievments on the project: - Introduction of automated unit testing and integration testing (JUnit, DBUnit..), code quality measurement (SonarScanner, SonarQube) - Setup Jenkins based build, delivery and deployment pipelines for all affected projects with all related tools (Jenkins, GitLab, SonarQube, Nexus Repo, Apache) in a containerized environment (Docker). - Standardized the "look and feel" of the sourcecode of both the Java and Shell based applications, programs (central common functions and model classes, similar package structures, standardized configuration accessible for all used languages etc). - Introduced Liquibase based DB development and deployment. Show less

Senior Developer

• Jun 2009 - Sep 2018

Although not always with development focus, I've been working on a lot of interesting projects in multiple different roles and positions: 2018 Setup "Database Integration Team" that is responsible for delivering the Databases of T-Mobile Germany's Charging and Billing System.Responsibilities: hiring, knowledge transfer, modernization of build and deployment processTechnologies: Oracle DB, Shell scripting, Perl, Python, Solaris, Linux, GitLab, Jenkins 2012 - 2018 Application Operation of T-Mobile Austria's end customer billing systemResponsibilities: monthly billing operation, adapting scripts and tools to multiserver environment, continuous improvement and automationTechnologies: BSCS iX R4, Red Hat Linux, Oracle Exadata RAC, Shell, Perl, monitoring 2015 Developing a new modernized ORM layer for the Abili-T Migration Framework. Technologies: Java, Spring, Eclipse, Maven, Oracle SQL, JUnit, DB Unit, EasyMock 2014 - 2017 I was responsible for the setup of a new Performance Test Environment for the Abili-T System, Deutsche Telekom's Billing System for fixed line mass market customers with approximately 30 million subscribers.Responsibilities: developing mass-data generator and test evaluator tools, performing, evaluating, documenting performance tests.Technologies: Netcracker RBM, Perl, Shell script, AIX, Oracle DB, AWR, IBM MQ 2009 - 2012 Developer on the Abili-T Migration project: 30 million customers and their contracts have to be migrated from the two old billing systems (T-Home and T-Online) to the newly developed one, aligning data with a couple of other systems.Responsibilities: DB schema design, migration rule development, interface developmentTechnologies: Power Designer, Oracle SQL, Eclipse, DSL, Netcracker RBM Show less

Team Leader

• Jul 2011 - Jan 2018

As a Team Leader I was responsible for a group of 15-25 people from a line management point of view. Main responsibilities and tasks:- "Well-being" of the team members- Planning of trainings and personal development goals- Performance evaluation, bonus, salary- Hiring and staffing- Supervision of projects- Solving day-to-day problems- Administrative tasks

Development Team Leader

• Jun 2004 - May 2009

As a Development Team Leader - also called Subsystem Owner - on the below mentioned RadioCommander project I led a couple of different groups during these five years. Sometimes I led just one Subsystems, sometimes more, but usually I was responsible for the work of 5-7 developers. These Subsystems were the following: - Command Handling - State Kernel - InformationModel Mapper - InformationModel Versioning - Command Line Interface - Command Scheduler - Update/UpgradeMy responsibilities were : - Distribution and controlling of the daily tasks - Mid/Long-term planning of human resources together with my superiors - Feature Responsibility (requirement analysis, planning, effort collection from other SS’s, coordination of development, quality), usual "size of a feature": 0.5-3 PersonYear - Coaching and mentoring subsystem members, technical leadership - Responsibility for quality of the Subsystem's design, code and documentation - Report of work towards managementMain features of the project and of the Susbsystems that I was responsible for: - C++ - Unix/Solaris - CORBA Show less

Software Developer

• Jun 2000 - Jun 2004

Software developer on Radio Commander (RC) project. RC is the Operation and Maintenance Center software of Siemens 2G, 3G and HSPA Radio Access Networks. The project consists among others of 200 developers, distributed in Hungary, Germany, Austria and Italy.My responsibilities as a developer are coding the required features based on design documents and executing the different steps of White Box testing.As a developer I take part in the development of the following subsystems: - Installation and Update Management: development of Unix Shell scripts that do the automated installation, update, upgrade and patching of the system. - InformationModel Versioning: development of a C++ based class-hierarchy that is responsible for making the version-differences of the managed network elements as transparent to the rest of the system as possible. - Layout Model Generation: design and develop a Perl tool that transforms and generates metadata that is used on the different user interfaces (CLI, GUI) for proper command representation, parametrization and conversion. Show less