Nils Rommelfanger

Maintenance and feature development of the backend for the social casino on the Spring Boot stack with Redis as cache and JPA/MySQL/Liquibase as persistence. Refactored the codebase to remove unneeded features and reduce the maintenance overhead. Implemented a new reusable feature, that allows the definition of arbitrary streaks with missions and rewards to increase the user engangement/retention.

Developed the navigation algorithm (adapted A*) for AGV from scratch with Spring Boot, Kotlin and MQTT deployed on a Raspberry Pi with AWS Greengrass. The algorithm solved the requirements of planing hundreds of robots on a 3D storage space with a storage density >99% online and in parallel.

I tested the performance with up to 10,000 robots and asserted that the calculation for a single route kept below 2 seconds. Continous Delivery. By testing the important aspects of the algorithm with JUnit and Mockito I ensured, that the software is always in a releasable state.

I implemented a basic deployment pipeline with Github Actions to build and test every commit in order to get fast feedback if a bug slipped through the local tests.

- Backend development of the micro service architecture based on Kotlin, Spring

Boot. With Kafka as message broker and Mongo DB as persistence, deployed on

a Kubernetes cluster in AWS.

- Designed and implemented multi tenancy support for the platform

- Improved the test coverage by adding tests with JUnit / Mockito

- Improved the observability by adding Logging and Tracing with Open Telemetry

- Held a one hour knowledge nugget about application logging and got very good

feedback

- Provided mentorship for the junior developers.

- Contributed to architecture decisions in the architecture com