Designed and developed an internal core service that is used to store dynamically defined object and asset data. The service is flexible to allow asset definitions for various use-cases and needs and allows modeling of various flexible relationships. This is built on top of a graph database. This replaced an older, less flexible system. The service was a main dependency for dozens of other services and had to be replaced in production with minimal downtime, which was a big challenge but ultimately was done without any issues.

Additionally, a knowledge storage service was added as an add-on that allows to gather and link various problems, causes and solutions and allows quick and easy lookups utilizing sophisticated search- and scoring algorithms as well as AI enabled look-ups including an integration into a chatbot.

Responsibilities: I was the main technically responsible person, who designed the architecture, did the necessary research and comparison of dependencies, designed the APIs and the general approaches. Main implementation and leading a team of 3 while ensuring best practices regarding clean code, maintainability, stability and extensibility as well as as easy as possible adaptation by other teams by maintaining an up-to date documentation which inspired other app-teams to adopt similar practices.

Moved and adapted the existing tech stack to a hybrid cloud platform. This involved implementing comprehensive DevOps practices, GitLab CI/CD pipelines, Kubernetes orchestration, and monitoring solutions. Developed new applications and micro services, software development of new applications. Adaptations and extensions of existing applications, system integrations and setup and enablement of running distributed systems. Operating a stack of over 150 different services in various on-prem environments. Implementing and ensuring best practices across various teams.

Consulting on tourplanning application development with focus on algorithmic approaches and common implementation challenges.

Responsibilities: Providing expert guidance on tourplanning application development with focus on algorithmic approaches and implementation challenges. I designed and facilitated the workshop.

Developing a mobile app including peer-to-peer video calling and educational games for children.

Responsibilities: I was the technical lead here, set up the project, built the proof of concept (android app / azure backend), did the requirements engineering and created the architectural layout.

Development of a web-based tool for creating, annotating and managing maps for autonomous vehicles in global scale. The tool is based on a cloud native architecture on AWS and a SPA frontend written in ReactJS.

Responsibilities: As a lead developer I collaborated closely with the client for finding the technical approaches to solve the given problems. I set up the basic skeleton and a first proof of concept of the tool as a common ground to start working with. I designed the cloud native architecture of the backend services to process and serve the vast amount of data for the maps. I also did most of the backend implementation regarding this point and a lot of performance and stability improvements. I did code reviews for the frontend and introduced new design patterns or did code-refactorings when needed to improve quality and ensure a good maintainability.