DevSecOps & Kubernetes Architekt • 20+ Jahre Banking, Energy, Public Sector • OnPrem & Cloud

I was part of the “Tiger Team” or more meaningful: “Performance Team”.
Our customers in the public sector lacked knowledge and visibility into a complex IT landscape.
The Tiger Team created insights, led workshops and provided custom tooling (e.g. Grafana Dashboards) incl. data aggregation and transformation.

Core Responsibilities
• Facilitating communication between development teams and the public-sector client (serving as primary point of contact)
• Designing and implementing a modern observability solution based on Instana
• Modernizing the technology stack within the SDLC (GitLab, DevSecOps)
• Stakeholder management across various public-sector end clients
• Standardizing communication and documentation of business processes (BPMN, DMN)

Key Achievements
• Established a new performance team bridging the gap between customer and public-sector client
• Rolled out APM solutions including Instana, Prometheus, and Grafana within the public-sector organization
• Led workshops on observability topics (situational awareness and alerting systems)

Tools and Technologies
OpenShift, APM Instana, Alfresco, Java 11, Weblogic, Python3, Streamlit, Instana (OSGi, Karaf), Prometheus, Grafana, ULS, CheckMK, REST,  gRPC, SOAP, TimescaleDB, Issuemanagement mit Jira, RTC, Eclipse RPC (OSGi), Gitlab Pipelines, GIT, CI/CD, Deployment Automation

Core Responsibilities
• Acting as the primary point of contact between development teams and the offshore infrastructure team
• Building the team (recruiting, onboarding, defining team topology)
• Conducting technical due diligence
• Designing and developing a modern data platform in the Azure Cloud

Key Achievements
• Successfully took a modern platform (NDA) from proof of concept to production in under 18 months with a small but highly motivated core team
• Seamless handover to internal development teams, supported by comprehensive workshops and tutorials



Tools and Technologies
Java 11 & 17, Kubernetes (AKS), Microservices with Quarkus & Spring Boot, Elasticsearch, PostgreSQL, MongoDB, Azure Pipelines, Azure Insights, Velero, MinIO (S3), Prometheus & Grafana Stack

For Postbank Systems, a modern (micro-)service-oriented solution was initially developed for a specific requirement (integration architecture into existing, complex system landscape).
In the second phase, a modern CI/CD pipeline was created to match the microservice approach (Git Feature Branch Model, Bamboo release builds, deployment via Nexus).
In the final phase, integration into a Postbank-internal cloud solution based on OpenShift was implemented.

Throughout this process, internal employees were comprehensively advised and trained on all technical innovations, including through demo projects, technical spikes, and presentations."
This appears to be describing a three-phase modernization project involving microservices architecture, CI/CD pipeline implementation, and cloud migration with accompanying staff training and knowledge transfer.

Tools and Technologies
Google Cloud Platfrom (GCP), Cloud Run (KNative), Hosted Kubernetes, Java 8 & Java 11, Redhat OpenShift, Kubernetes, Docker, Spring Boot (Microservices, 12-factor applications), SonarQube, Spring Data mit PostgreSQL , Apache Camel, Apache Karaf (OSGi), REST, SOAP Webservices (SAP PS), IBM MQ, Jira/Confluence/Bamboo, Apache Maven, CI/CD Pipeline auf Kubernetes mit Jenkins, SVN & Git, Selenium

In this probably most progressive tech organization within all of Volkswagen I was hired by the CTO of MOIA to provide an early Integration for remote vehicle controls under extreme time pressure.


Core Responsibilities
• Acting as the primary point of contact between development teams and the offshore infrastructure team
• Building the team (recruiting, onboarding, defining team topology)
• Conducting technical due diligence
• Designing and developing a modern data platform in the Azure Cloud

Key Achievements
• Successfully took a modern platform (NDA) from proof of concept to production in under 18 months with a small but highly motivated core team
• Seamless handover to internal development teams, supported by comprehensive workshops and tutorials



Tools and Technologies
Java 8, Kotlin,REST, Webservices, AWS (Amazon Web Services) Stack (u.a. AWS Lambda, AWS SQS, AWS Kinesis, AWS Redshift - SQL - etc.), Gradle, Python, Serverless Framework, Jira, Confluence, Github

Core Responsibilities:
• Building and leading a development team (Core), architecture, test system setup, automation / BDD, platform development including proactive dependency management (repository setup, upstream/downstream management & automation for OSGi bundles)
• A (PCI-compliant) payment gateway was to be refactored from an extremely non-performant microservice-oriented architecture into a more homogeneous OSGi-based solution. The microservices deployment implemented by the client proved to be very ineffective in this project, as features could be quickly developed as "microservices," but among other issues, the overall quality of the integrated (production) system was insufficient, meaningful data models were practically non-existent, and technically simple business cases became technically more complicated.
• As a solution, and in this refactoring team TM was significantly involved as team lead, approximately 30 individual systems were integrated into a Karaf-based platform, whose modularity was ensured through bundles (OSGi), features (Karaf), and OSGi services. This represents a migration from Spring Boot to Karaf (purely technical) while simultaneously consolidating and reorganizing the data model.
• Great emphasis was placed on the testability of this system, as such a migration was technically very demanding, and functional teams had no or limited deep OSGi knowledge. Through custom test APIs, all business and technical components can be easily, quickly, and efficiently configured, instantiated, and debugged in the test context as desired. Without OSGi knowledge.
• In the second step, a redesign of the RDBMS-based data storage was undertaken. First, an event system was introduced, which enabled new functionalities after the purely technical refactoring: including historization, audit trail, full-text search (read models). The step toward complete decoupling of read and write operations according to CQRS was also designed. However, this was not rolled out to production, as there was strong interest from the client side in traditional APIs (classic Java Bean Model vs. Commands).
• In this final step, a variant of the serverless paradigm was implemented: business functionality was freed from deployment details, so that developers could transparently deploy individual components locally & in the cloud. For this purpose, a CLI was developed that completely handles build, verification, packaging (ZIP, Docker image), and deployment (local, docker, k8s).
• Finally, Toni worked with primary responsibility on the integration of the graph database JanusGraph (formerly Titan). This also involves APIs around Gremlin, Tinkerpop, Cassandra (storage), and Elasticsearch. The goal is to provide a technology-neutral abstraction (API) in Java that can be used by business components. Beyond pure abstraction (object to graph), this also involved developing a Software Development Kit (SDK) including test harness, deployment shell for local vs. cloud deployments, validation, bootstrapping, and help system.

Tools and Technologies
Kotlin & Java 8, Microservices, Spring Boot, Kubernetes, Docker, Terraform, Hibernate ORM, RDBMS (PostgreSQL), Elasticsearch, Kibana (ELK Stack), OSGi, Apache Felix & Eclipse Equinox (Varianten & Testing), Karaf, Gradle, REST Api Design (Swagger/Open API),div. Testframeworks u.a. JUnit5, BDD via Cucumber, Graphtechnologien: JanusGraph, Gremlin/Tinkerpop, Git, Github, SonarQube
Paradigms: EventSourcing, Design CQRS, DevOps, Infrastructure as Code,  Python, Numpy, Robotframework, PyTorch, Agiles Software Development

Toni was personally recruited by "OSGi father" Peter Kriens as the preferred candidate for this project. The task was to support a 12-member development team as an OSGi coach over approximately 15 months and, as part of the architecture team, prepare the platform for the coming years. TM developed a customized Eclipse IDE (called Iguana Studio) to provide the newly formed team with a productive environment right from the start (plugins, configuration, updates, code style, governance). TM trained the team (later two separate teams) in weekly workshops on topics including Java 8, OSGi, unit/integration/system testing, BDD, performance testing, build systems, and best practices. TM was available on-site and remotely for the teams to address technical and business problems at any time.

Tools and Technologies
Java, Classloading, Java Modularity, OSGi, BndTools, Gradle, Apache Felix, Enroute, Low level multithreaded application, reactive programming model, DerbyDB SQL.

As part of a technical development team, TM worked on a new portfolio simulation based on the Spring platform. Special focus was placed on so-called staging, i.e., the preparation of large data volumes. TM implemented a suitable build pipeline including artifact governance in a demanding infrastructure with Nexus, Maven, Jenkins, among others. TM introduced a rule-based expert system based on Drools (proof of concept implementation).

Tools and Technologies
Java, Hibernate ORM (SQL), Junit, Sybase, FlywayDB, Drools, Maven, Maven Plugin Development

Within the scope of a Deutsche Bank group-wide migration project, responsible for the analysis platform for risk assessment, among other things. Building and leading a development team for implementing a Rich Client Application (RCP) with OSGi backend (3-tier). Responsible for Scrum process, release management, system architecture. Selection and evaluation of new team members.

In the second part of the assignment, Toni dealt with the next generation of this platform based on Big Data concepts. Technologically, Apache Storm, Apache Kafka with a Cassandra cluster are used here. Solutions based on Event Sourcing and the so-called Lambda Architecture (batch processing with Hadoop, real-time processing with Apache Storm) were evaluated, among others.


Tools and Technologies
Java, Eclipse RCP, GIT, Bitbucket, Junit, OSGi, JPA, JDO, Enterprise Architect,UML,Tycho, Apache Storm, Apache Kafka, Hadoop, Cassandra

Provide consulting and feedback on the design of OGEMA interfaces based on state-of-the-art Java technology and conventions

• Consulting and feedback on the use of available open source tools for OGEMA in the areas of web frameworks, build tools, etc.
• Consulting regarding the development of an open source community and positioning of the project in the open source space
• Coaching: Apache Maven

Tools and Technologies
Java, OSGi, Eclipse, Ant, Android

Development, definition, and execution of tests to comply with quality standards, coaching of development teams in the aforementioned topics. Building a continuous build and deployment pipeline using Maven, Jenkins/Hudson, & Nexus, various plugins (including plugin development). For this purpose, TM trained several development teams, provided support, and drove architecture decisions. The goal is to be able to create release-ready software distributions with a high degree of automation at any point in time (Lean Software Development, pull-based automation). This includes: automated versioning, release management, test environment management, virtualization solutions, continuous deployment.

Tools and Technologies
Java SE6, Maven, Jenkins, Sonar

First assignment:
Development, definition, and execution of tests to comply with quality standards, coaching of development teams in the aforementioned topics. Building a continuous build and deployment pipeline using Maven, Jenkins/Hudson, & Nexus, various plugins (including plugin development). For this purpose, TM trained several development teams, provided support, and drove architecture decisions. The goal is to be able to create release-ready software distributions with a high degree of automation at any point in time (Lean Software Development, pull-based automation). This includes: automated versioning, release management, test environment management, virtualization solutions, continuous deployment.

In another assignment the role was to advise, lead, and coach an existing development team in the areas of:

• Modular development (use of Dependency Injection, better use of Maven and Jenkins tools)
• Test-driven development (use of Selenium and Fitnesse. Generally: development of testable software)
• Team organization and communication in a decentralized environment

Tools and Technologies
Java, JEE, Spring, Maven, Jenkins/Hudson, JBehave, Selenium, TestNG, div. Mock Frameworks, Checkstyle, PMD, Sonar, Cucumber, Fitnesse, Nexus, Chef, Ruby, Vagrant, VMWare, Apache CXF, Hibernate, Fitnesse, Cucumber

1st Project Implementation of an OSGi-based runtime for an existing Java server application. Creation of an integration test architecture for OSGi components (bundles) based on Pax Exam. Target audience are distributed development teams (London, Shanghai) with whom requirements are coordinated. Building a continuous build and deployment pipeline using Maven, Jenkins/Hudson, & Nexus, various plugins (including plugin development).
2nd Project Technology research & consulting in the Big Data area, performance test framework based on Scala + Akka.
The goal is to prepare the internal infrastructure for new requirements. Within this scope, several prototypes for various concepts were implemented and evaluated. Through short iterations, valuable information could be gathered that flowed into architecture decisions. This leads to project risk reduction (template: Lean Manufacturing).

Tools and Technologies
Java, Git, OSGi, Qi4J/Apache Zest, DDD, Perforce, Gradle, DB2, Ant , Scala, KDB, Neo4j, Apache Cassandra, Akka. Technology Research: BigTable & Amazon’s Dynamo

Architecture and code reviews of an existing software platform

• Conducting quality audits
• Process management of test scenarios and system environments
• Build configuration management with Subversion, Maven, Hudson, Nexus, and Sonar including test tools.

Tools and Technologies
Java, JEE,JS,IBM  JSF, ICEfaces, Websphere, Seam, Hibernate, Eclipse, Architekturrviews, Hudson, Maven

Building a build street (development, IDE integration, various test stages, release management)

• Conception and implementation of a new, OSGi-based architecture (backend)
• Integration into an existing product landscape
• Development of test concepts: unit test, integration test, system test, UI test, continuous integration builds

• Mentoring Agile Software Development

Tools and Technologies
Java, J2EE, JSF, JAAS, Wicket, OSGi, Ant, Scrum