Building a Java/Kafka/Spring pipeline that ingests logs, generates embeddings, and stores them in a vector database (Qdrant) for semantic search and RAG-based querying.

Event-driven ingestion via Apache Kafka; embedding generation and retrieval layer designed around Spring AI abstractions (VectorStore, EmbeddingModel) for provider portability.

Focus on the retrieval and relevance side: chunking strategy, metadata filtering, and search-quality measurement ? applying distributed-systems resilience patterns (retry, DLQ, idempotency) to LLM-integration workloads.

Daily hands-on use of agentic development tooling (Claude Code) as part of the build process.

• Architectural Leadership & Strategic Migration: Spearheading the migration of a large-scale Enterprise Legacy platform from Azure Services to AKS (Azure Kubernetes Service), ensuring high availability and seamless transition of critical logistics business logic.
• Event-Driven Architecture (Kafka): Designing and implementing high-throughput asynchronous communication using Apache Kafka.
• Kafka Streams: Leveraging Kafka Streams and event-sourcing patterns to ensure data consistency and decoupling of warehouse management modules.
• System Design (DDD & CQRS): Architecting complex domain models using DDD and CQRS, specifically focused on solving concurrency and scaling challenges in global logistics.
• Infrastructure & Cloud Automation (IaC): Leveraging Terraform and Helm charts to automate the provisioning and management of production-grade Kubernetes (AKS) environments, focusing on infrastructure stability, pod performance, and Kafka consumer group scaling.
• Technical Governance: Driving architectural consistency and mentoring the team in building robust, testable microservices (Java 21, Spring Boot 3.4).

• High-Throughput Event Processing: Engineered a system for processing events from TMS (Transport Management System) using Apache Kafka and Avro serialization, ensuring high data consistency and schema evolution safety.
• Resilience Engineering: Designed and implemented complex Kafka Retry Strategies (Retry/DQL topics) and Transactional Outbox patterns to guarantee message delivery and system reliability under heavy load.
• Performance Optimization & Load Testing: Conducted rigorous load testing and "to-the-bone" microservice optimization (Java 21, Spring Boot 3).
• Fine-tuning: Optimized JVM parameters and Kafka consumer configurations to achieve sub-second processing latency.
• Polyglot Persistence: Managed diverse data storage solutions, optimizing queries for MS SQL Server and MongoDB to support high-concurrency logistic workflows.

• Developing platform for bank institutions (Java 11, Spring Boot, PostgreSQL).
• Developing components in microservices architecture (REST API, gRPC API, RabbitMQ).
• Writing unit tests and integration tests (JUnit, Testcontainers).

• Developing and maintaining omni-channel platform for Vodafone/Ziggo (Magento, PHP 7.3, ReactJS)
• Integration with external services (REST API, SOAP, Redis Queue)

• Working with designers and project management staff to capture requirements for website with agile methodology (Symfony 2/3, PHP 7.x, MySQL, RabbitMQ).
• Working with Test Driven Development Methodology (PHPUnit).
• Working in developers team with Continuous Integration practices (Jenkins).

• Developing Magento web shop GH HEINEMANN in Backend team (Magento, SOLR, SAP integration, ActiveMQ).
• Building REST and SOAP APIs.
• Analysis and implementation of business requirements.

• Developing social network website seniorbook .de (Zend Framework, MongoDB, SOLR, jQuery)
• Working with Test Driven Development Methodology (PHPUnit)
• Working in developers team with Continuous Integration practices (Jenkins)

• Building PHP Web-Application for bank institution using PHP based frameworks (Zend, Symfony2, PostgreSQL, Oracle)
• Maintaining of existing web applications (SOAP)