Product Owner & Solution Architect & Coach

1/2020 – 12/2021

found in reference description 7
Deutsche Telekom logo
Solution Architect & Team Lead
Solution Architect & Team Lead
Deutsche Telekom · FreelanceDeutsche Telekom · Freelance
2020 - 2021 · 1 yr2020 to 2021 · 1 yr
RemoteRemote
? Self-Maintaining SDN for Scalable Fiber Network Connectivity

? Challenge:
Develop a self-maintaining Software-Defined Network (SDN) to manage fiber connections (FTTH, FTTB, etc.), enabling high-speed internet access for millions of consumers. The solution needed to seamlessly control fiber hardware, offer plug-and-play onboarding, and drastically reduce operational costs—all while running in a hybrid cloud and on-edge environment orchestrated by Kubernetes.

? Solution & Impact:
✔ Autonomous Network Management: Designed an SDN-driven system that automates fiber network operations, minimizing manual intervention.
✔ On-Edge & Cloud-Orchestrated Architecture: Built a hybrid setup, deploying on-edge services for low-latency operations and cloud-based orchestration for scalability.
✔ High-Performance Microservices: Developed a multi-language service stack, using Java, Go, and Rust, ensuring efficient, real-time fiber hardware control.
✔ Plug & Play Onboarding: Engineered a seamless onboarding process, allowing new network hardware to be detected and configured automatically.
✔ Massive Cost Optimization: Reduced operational costs by a factor of 100 through a microservices-driven architecture, replacing monolithic legacy solutions.

? Results:
? Enabled high-speed internet access for millions of consumers through automated fiber management.
⚡ Self-maintaining SDN reduced operational complexity and improved efficiency.
? Achieved 100x cost reduction by optimizing network orchestration with microservices.

Cloud Spezialist, DevOps, Teamleiter IT, Projektmanagement (IT), Solution Architekt

1/2019 – 12/2019

? Building a Seamless User Experience for an AI-Based Onboarding Platform

? Challenge:
Support a startup (formerly SoundReply) in bringing their vision to life by developing an interactive backend for an AI-powered onboarding platform. The solution aimed to help employees get up to speed faster using natural language processing (NLP) and AI-driven interactions. The project required a scalable architecture in Google Cloud, using TypeScript and Rust, as part of a Flutter/Firebase application, later transitioning to AWS.

? Solution & Impact:
✔ AI-Powered Onboarding Platform: Developed an intelligent system that accelerates employee learning and adaptation using AI and NLP-driven interactions.
✔ Scalable & Interactive Backend: Designed a high-performance, responsive backend to support real-time AI-driven user interactions.
✔ Cloud Migration: Initially deployed on Google Cloud, later assisting in a seamless transition to AWS for enhanced scalability and flexibility.
✔ Optimized ML/NLP Workflows: Enabled efficient natural language processing, improving response times and overall user experience.
✔ Cross-Platform Integration: Ensured smooth interaction between Flutter frontends, Firebase services, and backend APIs.

? Results:
? Accelerated employee onboarding, reducing time-to-productivity through AI-driven guidance
?️ Enhanced AI-driven user experience with real-time interactions
☁️ Successful cloud transition, ensuring scalability & flexibility
? Empowered a startup to bring their vision to market

Cloud Spezialist, Cloud Computing, Google Cloud, Solution Architekt, Amazon Web Services (AWS)

1/2018 – 12/2020

? Modernizing a Global eCommerce Platform with SOA

? Challenge:
Transform the monolithic architecture of a leading international online pharmacy into a scalable, service-oriented architecture (SOA) using TypeScript, Go, and Spring Boot for the backend and ESNext with React for the frontend. The services were deployed in Google Kubernetes Engine (GKE) and Azure, secured by Istio Service Mesh, with a focus on SEO, cybersecurity, and automation.

? Solution & Impact:
✔ SOA Migration: Decomposed the monolith into scalable microservices for better performance and maintainability.
✔ Cloud-Native Deployment: Hosted services as Kubernetes Docker containers on GKE + Azure with Istio security.
✔ Full-Stack Optimization: Enhanced the frontend with React (ESNext) & Server-Side Rendering (SSR) for SEO and speed.
✔ Automated CI/CD: Set up build & testing automation, reducing deployment time and improving reliability.
✔ Team Enablement: Led a 6-week workshop to onboard teams in modern technologies, driving innovation.
✔ Cybersecurity Enhancements: Strengthened security with API gateways, authentication, and infrastructure hardening.

? Results:
?️ Faster, scalable, and secure eCommerce experience
? Improved SEO & site performance with SSR
? Stronger security & efficient cloud operations

Cloud Spezialist, Teamleiter IT, Google Cloud, Solution Architekt

1/2017 – 12/2018

? Building a Scalable & High-Performance eCommerce Platform

? Challenge:
Help Rose Bikes, a leading German bike manufacturer and retailer, scale their eCommerce platform while ensuring high availability, performance, and observability. The project required robust cloud architecture, centralized logging, and application performance monitoring to support rapid growth—all running on an on-premises Kubernetes cluster for full control over infrastructure.

? Solution & Impact:
✔ On-Prem Kubernetes Deployment: Designed, set up, and managed a self-hosted Kubernetes cluster to support the entire eCommerce ecosystem.
✔ Scalable eCommerce Architecture: Built a high-performance platform capable of handling increasing traffic and transactions.
✔ Performance Optimization: Implemented Application Performance Monitoring (APM) to enhance system reliability and response times.
✔ Centralized Logging: Developed a real-time logging infrastructure for improved troubleshooting and observability.
✔ Cloud & DevOps Strategy: Established CI/CD pipelines, automated deployments, and optimized Kubernetes infrastructure for scalability.

? Results:
?️ Robust eCommerce platform handling high-volume traffic and transactions
? Improved system observability with real-time performance monitoring & logging
⚡ Highly available on-prem Kubernetes cluster, ensuring full control & flexibility
? Enhanced scalability & reliability, supporting business growth

Cloud Spezialist, Lead Developer, Solution Architekt

1/2017 – 12/2017

? Architecting a Smart & Secure Internal Search Platform

? Challenge:
Enable ARAG SE employees to quickly and securely find relevant product, people, and internal information by designing a role-based search engine. The platform needed to support big data document storage, integrate with existing enterprise tools, and ensure secure access control across the organization.

? Solution & Impact:
✔ Role-Based Search Engine: Developed a robust search platform ensuring employees could only access documents and data based on their permissions.
✔ Enterprise-Wide Knowledge Hub: Created an intuitive portal that streamlined information retrieval across departments.
✔ Big Data Document Storage: Designed a scalable document storage solution to handle vast amounts of internal data efficiently.
✔ Seamless Integrations: Connected the search engine with SharePoint, Salesforce, Confluence, and Jira, enabling a unified search experience across all major company platforms.
✔ High-Performance Architecture: Built a resilient, fast, and responsive search experience tailored for enterprise needs.

? Results:
? Fast & secure access to critical product, people, and company information
? Role-based security model, ensuring controlled and compliant document access
? Integrated enterprise tools, making SharePoint, Salesforce, Confluence, and Jira content easily searchable
? Improved productivity by reducing search time for internal knowledge
? Scalable document storage, enabling efficient handling of enterprise big data

Big Data, Lead Developer, Teamleiter IT, Solution Architekt

1/2012 – 12/2015

Deutsche Bahn logo
Solution Architect & Lead Developer
Solution Architect & Lead Developer
Deutsche Bahn · ContractDeutsche Bahn · Contract
Jan 2012 - Dec 2015 · 4 yrsJan 2012 to Dec 2015 · 4 yrs
Germany · HybridGermany · Hybrid
? Optimizing Procurement with a High-Performance Buyer Portal

? Challenge:
Support Deutsche Bahn AG, Germany’s largest railway company, in optimizing their internal procurement process by developing a high-performance buyer portal. The system needed to handle business-critical changes in real time, incorporate role-based access control, and significantly reduce operational costs.

? Solution & Impact:
✔ Role-Based Search Engine: Built an advanced search platform ensuring employees accessed only relevant procurement data based on their permissions.
✔ High-Performance Indexing: Developed an efficient indexing logic to track and process business-critical updates in real time.
✔ Cost-Effective Procurement: Streamlined the internal buying process, drastically reducing additional costs per order.
✔ Scalable & Secure Architecture: Designed a robust system capable of handling large-scale procurement operations reliably.

? Results:
? Reduced procurement costs from €80 per order to just €5
? Faster & more efficient internal buying process
? Secure & role-based access, ensuring compliance and data protection
? High-performance indexing, enabling real-time business-critical updates

Lead Developer, Solution Architekt

1/2010 – 12/2017

? Engineering a Specialized & Highly Customizable Search Portal

? Challenge:
Develop a powerful and flexible search portal for Bosch GmbH, a leading German engineering company. The system needed to support a highly specialized wildcard logic for searching product numbers, where each number carried a unique meaning. The search engine had to cater to power users with advanced search capabilities while remaining accessible to other employees.

? Solution & Impact:
✔ Specialized Search Logic: Designed a custom wildcard search system tailored to Bosch’s complex product number structures.
✔ Power User Optimization: Developed an advanced query interface for experienced users while maintaining usability for general employees.
✔ Highly Customizable Architecture: Built a modular and adaptable search engine that could evolve with business needs.
✔ Fast & Scalable Performance: Engineered a high-speed indexing system to ensure real-time and accurate search results.

? Results:
? Efficient wildcard search tailored to Bosch’s unique product numbering system
? Optimized for power users, enabling fast and precise data retrieval
? User-friendly design, making advanced search accessible to all employees
? Scalable & future-proof, allowing continuous customization and growth

Lead Developer, Teamleiter IT, Solution Architekt

1/2010 – 12/2014

? Optimizing Procurement with a High-Performance Buyer Portal

? Challenge:
Support Deutsche Telekom AG, one of Germany’s largest telecommunications companies, in optimizing its internal procurement process by developing a high-performance buyer portal. The system needed to handle ~3 million products, process business-critical changes in real time, incorporate role-based access control, and significantly reduce operational costs.

? Solution & Impact:
✔ Role-Based Search Engine: Built an advanced search platform ensuring employees accessed only relevant procurement data based on their permissions.
✔ High-Performance Indexing: Developed an efficient indexing logic to track and process business-critical updates in real time across millions of products.
✔ Cost-Effective Procurement: Streamlined the internal buying process, drastically reducing additional costs per order.
✔ Scalable & Secure Architecture: Designed a robust system capable of handling large-scale procurement operations reliably.

? Results:
? Optimized procurement handling for ~3 million products
? Faster & more efficient internal buying process
? Secure & role-based access, ensuring compliance and data protection
? High-performance indexing, enabling real-time business-critical updates

Lead Developer, Solution Architekt, Teamleiter