Mathias Arens is a Senior Java Developer with over a decade of hands-on experience building agile e-commerce and banking systems, now driving Java and cloud initiatives at E.ON Digital Technology. He combines deep Spring and TDD expertise with practical cloud-native patterns honed across firms like Otto and JPMorgan Chase, consistently translating complex requirements into reliable production services. A trusted mentor, he focuses on developer enablement and stakeholder alignment to accelerate delivery without sacrificing quality. Mathias pairs strong academic credentials—a Diplom in Computer Science and an MBA—with a habitual curiosity for experimenting with new languages and frameworks on GitHub, which keeps his technical toolkit fresh.
12 years of coding experience
19 years of employment as a software developer
Diplom, Computer Science, 1.2, Diplom, Computer Science, 1.2 at Universität Dortmund
Master of Business Administration - MBA, Business Administration and Management, General, 1.82, Master of Business Administration - MBA, Business Administration and Management, General, 1.82 at University of Düsseldorf
Keeping track of your tenants' payments. Rent payment tracker with support for German banking accounts. Very similar logic to commercial offerings like vermietet.de or immo42.de
Contributions:321 commits, 297 pushes, 5 branches in 4 years
trackerecommercepayment-methodstenantsbanking
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Mathias Arens - Senior Java Developer at E.ON Digital Technology