Theonas Chartomatzis is a Principal Software Engineer at OnGen Ltd. They is proficient in English. Colleagues describe them as "Theo joined our organisation as a Senior Engineer and quickly progressed through the ranks to become a Principal Engineering. He has led one of the most foundational and impactful initiatives as part of our new SaaS platform. Not only is he a great engineer he is an incredibly humble individual who thrives in challenging environments with a calmness that keeps his team delivering high-quality work whilst also having fun. I would not hesitate to recommend Theo and I hope our working relationship continues for a number of years to come!" and "I really enjoyed working with Theo during my time at Craneware. He was extremely professional and completed his work to the highest of standards. Theo was always happy to assist in helping me improve my coding abilities and to answer fellow colleagues' questions. He continually pushed himself to learn new tech or improve his existing knowledge to the benefit of his team and to Craneware. "