Younited
Mathieu Guillemain is a seasoned software developer with extensive experience in full-stack development and tech leadership. Currently serving as a Full-stack Developer at Younited since March 2025, Mathieu is focused on developing an earmarked loans API solution for partners. From July 2016 to July 2025, Mathieu held the position of Tech Lead at American Express Global Business Travel, where the work involved the Neo travel and expense SaaS application suite. Previous roles include Full-stack Developer at ITG, Lead Developer at PPG Industries, and Back-end Developer/Software Architect at Thales Services, contributing to significant projects such as equipment simulators for the French Ministry of Defense and a customer web platform for the Danish travel card system. Mathieu holds a Master's degree in computer science from ISTY.
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