Java Experts in Essen

• Operation and further development of the network and security infrastructure.

• Monitoring, analysis and resolution of network and security incidents.

• Cross-departmental collaboration with other teams on operations and further development, and reporting.

• Firewall vulnerability analysis.

• Firewall access requests.

• Troubleshooting IP communication issues on network and firewall infrastructure.

• Security-critical IT infrastructure, processing of personal data, compliance with legal requirements.

• Products: Palo Alto Networks Firewalls, Cisco ACI, Checkpoint Firewalls, F5

• Technologies: SDN, SDWAN, Cisco EPIC, Cisco ACI

• Established a cyber resilience framework for AI-accelerated threats in the Frontier AI Threat Endurance (FATE) program: capability assessments, maturity assessments and gap analyses covering cyber security, operational resilience, incident response, recovery and governance, followed by target concepts and improvement measures
• Supported action owners from specification through implementation: implementation roadmaps, decision papers, management presentations and governance reporting, as well as audit- and supervision-ready documentation; managed stakeholders from IT, Information Security, Risk Management, Operational Resilience, Business Continuity and the business units

Fashion Genius was building an AI fashion advisor for online shops. As fractional CTO I:

• Worked with the founder on product and AI strategy
• Found and managed the development company
• Led the build of a Shopify plugin: a chat assistant that looks at a customer's item, gives fashion advice, and recommends matching products from the shop's catalogue
• Designed it as a structured AI workflow, which kept it controllable, fast, and affordable to run

• Setting architectural standards for Informatica Power Center development teams
• Maintenance-performance-health for DWH (Exadata) environments
• Qlik Sense / BO reports architectural standards
• Implementing best practices in ETL tasks
• Documentation ETL standards on Confluence
• Dynamic Data Masking rules for GDPR/KVKK regulations by using Informatica DDM tool
• DWH Data model Power Designer
• Upgrade Qlik Sense versions
• Merge all Informatica server's repository databases on one Oracle DB

• Training AI models, evaluating images and text UI/UX, turning the provided data into insights through OpenAI Feather as part of the machine learning workflow

Technologies: OpenAI Feather

Tools: Fabric, AWS, dbt, Power BI, SQL, DWH, R, Python

• Supported customers in implementing an architecture design for extracting and preparing data
• Planned the design and implementation of the BI and DWH platform
• Ensured the scalability and performance of the data platform

• Delivered MVP-focused full-stack architecture for a health-sector client: Vite/React frontend, backend services on Google Cloud Run, and Supabase for database plus IAM/authentication.
• Supported product requirements engineering and prioritized cost-aware workload placement, implementing browser-side/edge computation where feasible before moving logic to backend services.

• Development of Power BI reports, measures, and KPIs for sales, purchasing, materials management, warehousing, and production
• Analysis of the proALPHA database (Progress OpenEdge) and high-performance SQL queries for extraction and transformation
• Data models, ETL processes, and pipelines including automated refresh via Power BI Service and Data Gateway
• Gathering requirements and implementation in close coordination with the specialist departments

Selected projects:

• Sales report: revenue, incoming orders, and order status
• Purchasing report with automated purchase suggestions (Power Automate)
• Monitoring of missing parts for production and materials management
• Production bills of materials on Microsoft Fabric including deployment pipeline (Dev → Prod)
• Forecast comparison report
• Central Power BI apps that bundle all reports by department

Technologies: Power BI, DAX, Power Query (M), SQL, proALPHA, Progress OpenEdge, Microsoft Fabric, Power Automate, Python

• Title: Enhancing Syntactic Awareness in Transformer Language Models for Hindi Dependency Parsing
• Investigated syntactic knowledge captured by transformer language models (RoBERTa, XLM-RoBERTa) for Hindi dependency parsing, a morphologically rich and low-resource language.
• Developed structure-aware model variants (Struct_Roberta_hi, Struct_XLMR) by integrating a CNN-based parser network between transformer layers, inspired by the StructFormer architecture.
• Conducted extensive error analysis including label-wise, distance-based, direction-based, sentence length-based, and LVC/Non-LVC evaluations.
• Evaluated models on downstream NLP tasks (NER, POS tagging) using the IndicXTREME benchmark.

(Maternity/Parental Leave: July 2023 – Aug 2024)

• Domain: Payment Domain | Client: Telefonica Germany
• Project: General Payment Service

The General Payment Service is responsible for processing of online payments via external payment service provider like Safer pay and PayPal

• Developed Design of Use (DOU) and interface contract documentation, ensuring clarity and compliance across system integrations
• Designed and delivered REST/SOAP web services with Spring Boot and Spring Data JPA, publishing Swagger contracts through WSO2 API Gateway to improve accessibility and governance.
• Spearheaded the on-premises to AWS Cloud migration, re-platforming from Oracle to PostgreSQL on AWS RDS and deploying services on EC2, improving scalability and cost efficiency.
• Containerized microservices using Docker and orchestrated deployments with Kubernetes, streamlining deployment pipelines and improving system reliability.
• Implemented proactive monitoring and logging via AWS CloudWatch and Kibana, ensuring stability and performance during cutover.
• Enhanced collaboration through code reviews and peer reviews, promoting maintainability and clean coding standards.
• Strengthened quality by writing comprehensive JUnit tests and preparing detailed test cases enabling early defect detection
• Delivered automated API testing with Ready API, Postman, and SOAPUI, and conducted performance testing with JMeter, ensuring reliability in high-transaction environments.

• Requirements analysis
• Provisioning of SharePoint sites and permissions
• Provisioning of SharePoint libraries and lists as data repositories
• Development of the UI with Power Apps
• Development of automations with Power Automate to transfer data from Power Apps using Dataverse connectors
• Creation, customization and management of Power Platform security roles
• Creation and management of Power Platform Pipelines
• Development of a UX design with Power Apps

• Frontend development
• Spring Boot
• Swagger
• Git
• GitLab
• SonarQube
• Docker
• Maven
• Java
• Angular

• Company FROX (Schweiz), end customer: Bundesamt für Informatik und Telekommunikation.
• Consulting and development. ITSM Suite, development of a semi-generic REST API interface solution. Performance tuning.

• Evaluation and further development of Engineering Excellence initiatives as part of the “Digital First” program
• Validation of efficiency, productivity, and cost-saving potential in the Software Development Lifecycle (SDLC)
• Organization-wide analysis of the use of Generative AI in the Software Development Lifecycle (SDLC)
• Evaluation of optimization measures in the areas of product management, delivery, developer experience, metrics, and quality assurance
• Alignment of the “Next Level Architecture (NLA)” target vision with regard to organizational design, governance model, and scalability
• Identification of structural bottlenecks in the delivery organization and development of alternative optimization approaches
• Preparation of decision-making and management documents for department management and the Executive Board to evaluate efficiency potential and transformation measures

Skillset: Engineering Excellence, Operating Model Design, Generative AI, AI in SDLC, SAFe, DevOps, Software Delivery Metrics, Value Streams, Team Topologies, Domain Driven Design, Azure DevOps, Jira, Confluence, Management Reporting, Business Case Assessment