Jürgen Fey

As a Project Lead, Lead Architect, CTO and Innovation Architect, I specialize in designing and implementing (hands-on) complex systems across a variety of domains including embedded, edge computing, IoT, backend development, machine learning and mobile. My technical expertise spans a range of programming languages and frameworks/technologies, including Golang, Java, Quarkus, Node.js (NestJS), Python for machine learning and Angular for web development, Android and Ionic for mobile applications. I am also working with IoT/Embedded and edge devices, sensors and have a complete hardware lab at my location available.

Since 2023 I am working with LLMs and tools like ChatGPT, Claude AI, various open source LLM models for local solutions, the LangChain/LangGraph tool family, Ollama and LM Studio, Cursor, Windsurf and various vector databases. I am using local LLMs for privacy-focused use cases. I am proficient implementing Agents, different RAG solutions and integrating content ingesters including multi-modal environments. Currently I focus on the implementation and concepts related to MCP- and A2A-Agent use cases. I worked with tools like Supervision for AI-assisted video analysis (Traffic, Production etc.). I built up a set of tools for LLM use cases. Constantly checking the open source and closed source tool offerings.

I have a deep background in video streaming technologies such as WebRTC - in specific PION and LiveKit - and machine learning frameworks including OpenCV, PyTorch, and TensorFlow. In nearly all my recent projects I introduced "Observability" solutions based on OpenTelemetry (OTel), Prometheus, Grafana, Jaeger, fluent-bit. I often introduce topics like application KPIs, metrics and then help the teams to implement respective code.

As a Senior/Lead System Architect for companies like Telekom, Siemens ITS, Siemens Mobility, Allianz, Arvato, Lufthansa Industry or BSH, I successfully achieved my tasks analyzing complex systems, identifying both explicit and implicit requirements, and delivering solutions that align with all stakeholders' expectations. My role has often involved acting as a senior technical liaison for both local and offshore development teams, notably establishing successful collaborations with teams in India - including on-site visits in India.

My expertise extends to UX/UI design, where I have developed a focus since my time as UI Specialist at Vodafone Global. I offer services from analysis and integration of standards to wireframe creation and briefing visual designers. In addition I implement UI using Angular and Ionic. My services include designing interfaces for embedded/edge systems, mobile solutions, and multimodal UIs, with a particular emphasis on integrating speech dialog systems and developing NLP and LLM-related solutions for edge devices.

In the realm of big data and data space systems, I am experienced in building scalable architectures using Kafka, TimescaleDB, Presto, Pig, S3 and Hive. Another focus includes exploring Iceberg for structured big data management. My primary goal is to help customers identify and implement optimal solutions by thoroughly understanding their requirements and acting as a strategic sparring partner to refine and enhance project scopes. I work with on-premise hardware, cloud systems (AWS, Azure, GCP) and various custom IoT devices – a dedicated hardware lab is part of my environment.

I also consider workshops and technical consulting for companies and teams for topics like Kafka, TimescaleDB, LLMs, GenAI, complex backends, Microservices etc. These are usually short-term projects and are not listed in my history.