Marek Rjelka

The procurement of raw materials and components in the aviation industry is often inefficient, non-transparent, and highly manual. Buyers need to identify suitable suppliers worldwide, solicit and compare quotes, and evaluate technical specifications across different standards. These processes are time-consuming, error-prone, and poorly scalable.

Solution

JULIE is an AI-powered sourcing platform that digitizes and automates the entire procurement process. It identifies suitable suppliers worldwide, creates and manages RFQs, analyzes quotes, assists in selecting optimal options, and identifies equivalent material alternatives across standards and countries.

Result

As a full-stack developer, I worked on both the Strapi/Node.js backend and the React frontend. My contributions include the entire reporting module (from filtering raw data and aggregation to visualization in charts), the supplier/material management system, and the bid comparison function. In collaboration with an international team, I followed consistent branching and merging processes, cleaned up the code, and fixed both functional errors and user experience issues.

The introduction of a new printing system in an existing manufacturing environment is more than just an installation project. Numerous tasks arise from the initial requirements analysis to ongoing operation, demanding technical understanding, customer proximity, and rapid response capabilities simultaneously. Without continuous, single-source support, friction arises between planning, implementation, and operation.

Solution

The project began with a joint requirements analysis and planning session with the customer: Which parts should be marked, which interfaces need to be operated, what are the local constraints? This was followed by the commissioning of the printing system directly on the production floor. Any problems that arose were analyzed and resolved on-site with the customer. After the initial installation, I took over further technical support, partly remotely, partly on-site, depending on the urgency and complexity. In parallel, customer-specific software extensions were implemented for the printing system, such as additional interfaces or customized workflows. Even after project completion, I ensured ongoing support within the framework of after-sales service: maintenance, support, and adjustments for changed requirements.

Result

A comprehensively supported printing system, from project initiation through commissioning to ongoing operation and beyond. The customer had a single point of contact for planning, technology, and support, which kept communication channels short and response times low.

The touch panel of the MPERIA printer controller (industrial printer from Matthews/Marking Systems) failed shortly before a customer demo. This rendered the only intended user interface, the local touch HMI, unusable. Print jobs could not be configured, messages could not be selected, print lines could not be started/stopped, and no backups could be created or restored. The printer was effectively inoperable.

Solution

Instead of repairing/replacing the touch panel, the existing TCP network interface (XML API) of the MPERIA controller was used. An MPERIA simulator runs on a PC, where the desired configuration is conveniently created. The configuration is then transferred as a backup file to the actual printer via the network. The reverse process (printer -> simulator) is also possible. Additionally, print lines can be triggered directly.

Result

The defective touchscreen is completely bypassed. The entire printer configuration is maintained remotely via the simulator on the PC and transferred via the network. The printer remains fully operational despite the hardware defect. The customer demo could be conducted, and the order secured!