Clients
I have been working as a freelancer since 2023. This is a list of selected clients I have been working for in the past.
To get a full list of projects with descriptions send me an e-mail.
2025
- RMS Radio Marketing Service GmbH & Co. KG
- Rightmart GmbH
- medienreich Training GmbH
- Hikari Data Solutions Ltd
- GFU Cyrus AG
2024
2023
Testimonials
Krzysztof Milczewksi, Head of Cyber Security Flight Ops @ Lufthansa AG
I had the pleasure of working with Orell as Lead Software Engineer on two complex projects.
[…]
Throughout both projects, Orell consistently exceeded expectations. His communication was clear and proactive, making collaboration effortless. He reliably honored all commitments, demonstrating exceptional professionalism and integrity. The code quality was outstanding: optimized, maintainable, and thoughtfully designed for future scalability.
His broad technical skill set, leadership, and problem-solving abilities make him a tremendous asset to any team. I was extremely satisfied with the service provided and would highly recommend Orell to any organization seeking a top-tier software engineer.
Frank Hundrieser, Tech Lead @ Lufthansa AG
I had the pleasure of Orell being contracted to support a software project at the Lufthansa Group.
[…]
His experience and ability to identify, address and resolve problems were evident in the development of the application. It was always a pleasure to discuss different solutions with someone at eye level.
Luca Zanna, CEO @ FinanceBI Sàrl
He not only delivered the solution but ensured it aligned with our requirements. It’s hard to find people who are good at both technical skills and communication, and Orell is one of the rare people.
Sascha Nitsch, CEO @ Sascha Nitsch Unternehmensberatung GmbH
Within these projects he has proven to be a very experienced software engineer. Due to his professional, transparent and fast communication the projects were completed smoothly.
If you are looking for an experienced C++ and Python developer we can highly recommend Orell.
Matthias Brzezinski, Freelancer
Orell always handles unexpected problems with a clear head and effective solutions. His reliability and professionalism have made our collaboration not only efficient but also pleasant.
(Translated from German)
