The goal of the internal project was to build an IoT architecture that utilizes the Azure IoT Hub. For this, I analyzed various message formats and set up test devices that were provisioned with their own Linux image. This was built with Yocto and orchestrated with Mender. Among other tasks, I wrote the firmware for the ESP32 devices and set up the certificate-based communication of the devices with the IoT Hub. Additionally, I set up Hashicorp Vault and my own CA. I also developed a concept for device provisioning with the certificates as well as the ability to do Over-the-air updates.

In this project for a client in the financial sector, the primary focus was on replacing the existing core software that processed a high volume of transactions and documents. This software plays a key role in the client's day-to-day operations, in document regulation, and due date determination – essential processes in the exchange between industry and trade. Additionally, payment transactions needed to be processed, necessitating strict compliance with compliance requirements.

The technology stack consisted of Kotlin/Java and Spring Boot, leveraging Kubernetes and the Azure Cloud as the platform. One aspect of the project, besides implementation, was the creation of architectural concepts that ensure scalability and robustness.

Furthermore, it was crucial to ensure compliance with complex tax and legal requirements, necessitating the development of efficient mechanisms for the creation and management of report documents. Moreover, comprehensive modernization and optimization of the existing code were advanced.