Willian Kumatsu
Senior Software Engineer at Xentral ERP Software
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolWillian Kumatsu is a Senior Software Engineer with 14 years of experience building resilient e-commerce and payments systems across Golang, Python and PHP, currently shaping strategic data pipelines at Xentral ERP in Berlin. He has repeatedly delivered high-throughput microservices—most notably an order creation pipeline handling 200+ requests/sec with async integrations—and introduced observability with OpenTelemetry into critical flows. His background spans payment gateway integrations (Adyen, Klarna, P24) and platform migrations, combining hands-on API design with pragmatic operational practices. Comfortable in both startup and enterprise settings, he brings deep domain knowledge in checkout, routing and transactional systems and a track record of turning complex integrations into reliable production services.
15 years of coding experience
13 years of employment as a software developer
Bachelor of Technology (B.Tech.) Information Technology, Bachelor of Technology (B.Tech.) Information Technology at Faculdade de Tecnologia de São Paulo - Ourinhos
Portuguese, English, French, Spanish, Japanese, German
Github Skills (21)
jquery9
sprint7
java3
docker2
golang2
profiling2
sdk2
kubectl1
virtual-machine1
vim-plugin1
commercetools1
kubernetes1
fuzzy-search1
ecommerce1
testing1
Programming languages (5)
Github contributions (5)
willianmk/myenv
Oct 2016 - Feb 2025
Contributions:8 pushes in 8 years 5 months
willianmk/magento-config-xsd
Jan 2012 - May 2015
Contributions:25 commits, 1 PR, 1 push in 3 years 4 months
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