Developing and maintaining (new) APIs and data processing applications for high-profile clients. Working together with multidisciplinary / multinational teams in an Agile, ISO-certified environment.

• Architected a high-concurrency middleware API from scratch, facilitating real-time data synchronisation between external vendor portals and ERPs.
• Optimised data transformation logic to maintain high conversion across endpoints.

Developing and maintaining the Bundeling communications platform.

• Led the architectural redesign and development of the Social Connect plug-in. Migrated the legacy stack to Go and Tailwind, transforming it into a high-performance, maintainable micro-component
• Delivered a lightning-fast user experience by optimising backend logic in Go, significantly reducing latency compared to previous iterations
• Developed and integrated core components for the Bundeling mobile and web ecosystem, focusing on code reusability and scalability

Engineered a comprehensive architectural overhaul of the core e-commerce platform and internal CRM/logistics tools, focusing on performance and scalability.

• Executed a full front-end refactoring and JS footprint reduction, skyrocketing Lighthouse scores from 25 to 90+
• Re-engineered a fragmented multi-tiered API into a unified high-performance layer, significantly reducing latency and server overhead
• Implement redesigned product pages to enhance consumer navigation flow and accessibility, contributing to higher conversion potential and user retention
• Authored and initiated a long-term architectural roadmap to modernise legacy systems, reducing technical debt and long-term (infrastructure) costs

Architecting secure, scalable micro-services by implementing Zero Trust principles within a Zero Trust environment.

• Engineered a foundational Zero Trust Mesh API Server in Go, establishing the standard for all internal micro-services by integrating JWT-based authorisation, high-performance routing, and automated rendering
• Architected and scaled a distributed messaging backbone using NATS/STAN to handle asynchronous pub-sub notification services across the ecosystem
• Built and maintained the Client Portal backend, delivering customer-facing threat management APIs for real-time firewall configuration, threat analytics, and business-core modules (CRM/Finance)
• Standardised organisational technical debt by formalising internal documentation, asset assembly pipelines, and architectural blueprints for rapid service deployment

Back-end web development for high traffic applications (shops, portals & APIs) in B2C market.

• Co-authored and implemented backend architecture for high-traffic B2C portals and APIs, ensuring stability for major telecom retailers including Vodafone and Media Markt
• Developed complex web applications and shops for Phone House and Typhone, focusing on seamless API integrations and performance optimisation
• Pursued clean code and sustainable design patterns across diverse projects, ranging from large-scale telecom systems to specialised e-commerce platforms like Designtegels

Fullstack (interative) development of corporate website and custom CMS

• Ground-up development and maintenance of multilingual CMS (see project page).
• Design of product labels, catalogues and ads.
• Developed several tools to gain semi-automatic printing of multilingual product labels etc. using combinations of rudimentary office-technology.

• Hosting & maintaining website for fundraising organisation
• Orchestrated a complete technical overhaul of the platform, modernising the stack to improve donor engagement and system reliability
• Pro-bono management of hosting and security, ensuring 100% uptime for critical fundraising campaigns