Software Entwickler/ Software Engineer/ Cloud Architect

1/2016 – 6/2018

- Senior Developer in an inhouse and near shoring team.

Technical and business responsibility for:
- Services for persistence of customer data.
- Geo location services.
- Services related to Magenta TV and Magenta Smart Home.
- Supporting Services for features regarding telephony.

Enabling functions:
- Design and implementation of secure and horizontal scaleable microservices for cloud architectures.
- API design for microservices.
- Requirement engineering and architecture consolidation for inter corporate services e.g. between Deutsche Telekom and France Telekom (Orange).
- Create effort and cost estimations for components.
- Define and enforce development standards.
- Define and implement processes regarding release and configuration management.
- Technical specification of user stories.
- Consulting regarding technical feasibility for epics.
- Implement DevOps tasks like (CI/CD, Monitoring, Etc.).
- Create solutions design for load and performance testing.
- Code review and coaching of team mates.
- Threat analysis for critical components.

Used Technologies:
- Programming languages: (Java, Python, Groovy, Bash, JavaScript, SQL)
- Architectures: (Cloud Microservices mit Kubernetes und Spring Boot, CI mit Gitlab/ Jenkins, Rest Microservices mit Spring Cloud)
- Cloud environments: Cloud Umgebung (Microsoft Azure)
- Protocols: (Rest, JSON, HTTP, TCP, MQTT)
- Technologies: (Spring, AngularJS, View.JS, JUnit, Selenium, Hibernate, Spock, Docker, KVM)
- Operating Systems (Red Hat, Debian, Ubuntu)
- Databases (MySql, Postgre SQL, MS SQL, MongoDB)

Java (allg.), Microsoft Azure, Spring Framework

1/2016 – offen

- Co Founder of [...] (-Hyperlink entfernt-).
- Responsible for the technical vision, strategy and implementation.

IT-Strategieberatung, Software Architecture

6/2012 – 1/2016

- Responsibility for the hole life cycle of components from design to deployment.
- Create prototypes to prove technical feasibility or to evaluate new development tools.
- Organize communities of practice.
- Evangelist for micro services and and modern software development methods.
- 3rd level support for components.

Identity Management
- Design and implementation of a distributed and horizontal scalable Identity Management System.
- Implementation of OAuth 2.0, OpenID Connect, OpenID 2.0 in a Scrum Team.
- IETF participation and standardization in regards of OAuth 2.0.
- Security Review of critical components of other teams.

Customer In-signs
- Design and implement components in the context of customer self care and contract management in a scrum team.

Used technologies:
- Protocols/ Standards: (REST, SOAP, OAuth 2.0, OpenID Connect, OpenID 2.0, JSON, JMS, JWT, JWS, RSA)
- Technologies: (Spring, Java EE, Velocity, OSGI, JUnit, Selenium, Hibernate, Mockit, EasyMock, Spock)
- Operating Systems: (Red Hat, Debian, Ubuntu)
- Databases: (MySql, PostgreSQL, Cassandra)

Identitätsmanagement, Java (allg.), Red Hat Enterprise Linux (RHEL), Software Architecture

2/2011 – 6/2012

- Manage System Architecture for convergent TV use cases.
- Create solution architecture for development teams with text context convergent TV use cases.
- Create architectural guidelines.
- Check and balance the implementation of development teams.

Used technologies:
- Protocols: (REST, SOAP)
- Standards: (H264)
- Technologies: (Android, IOS, JMS, JUnit, Video and Audio DRM, Apache Lucene, Hadoop, HFS)
- Applicaitons: (Enterprise Architect, SVN)

Software Architecture, Supplier Relationship Management (SRM)