Juan-luis De Sousa-valadas Castaño
Senior Kubernetes Software Engineer at Mirantis
Zamora, Castile and León, Spain
Summary
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Rockstar🎓
Top SchoolJuan-luis De Sousa-valadas Castaño is a Senior Software Engineer with 11 years' experience specializing in Kubernetes and OpenShift, currently driving infrastructure at bunny.net after a senior role at Mirantis. He combines deep systems and networking knowledge with practical DevOps and back-end engineering, frequently diving into low-level details around storage, clusters, and reliability under pressure. A long-time OpenShift maintainer and trouble-shooter at Red Hat, he has resolved complex Kubernetes, etcd, and SDN issues across support and product teams. As an active contributor to the well-known k0s project, he has improved arm64 compatibility, backup/restore robustness, and core DNS and kube-router behaviors. Versatile and analytical, he pairs sysadmin instincts with software craftsmanship to ship resilient cloud-native systems. Based in Zamora, Spain, he brings a pragmatic, test-driven approach to distributed system hardening that’s informed by hands-on incident work.
11 years of coding experience
6 years of employment as a software developer
Desarrollo de aplicaciones multiplataforma, Programación informática, 7,8/10, Desarrollo de aplicaciones multiplataforma, Programación informática, 7,8/10 at IES. Claudio MoyanoCFGM Sistemas microinformaticos y redes, Computer/Information Technology Administration and Management, Final mark 10/10 with distinction Average mark 9,1/10, CFGM Sistemas microinformaticos y redes, Computer/Information Technology Administration and Management, Final mark 10/10 with distinction Average mark 9,1/10 at IES Los Sauces
Spanish, Portuguese, English
Github Skills (9)
kubernetes10
go10
kubernetes-pods10
dockers9
docker9
testing8
cicd8
etcd7
api-design7
Programming languages (9)
Github contributions (5)
k0sproject/k0s
Nov 2022 - Jan 2023
k0s - The Zero Friction Kubernetes
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:4 releases, 564 reviews, 52 commits in 2 months
Contributions summary:Juan-luis primarily contributed to the k0s project by fixing bugs and enhancing functionality related to Kubernetes management and deployment. They addressed issues like arm64 platform compatibility and added features such as configuring metricsBindAddress for kubeProxy and enabling hairpin mode for kube-router. Furthermore, the user implemented tests to reboot the cluster and improved the robustness of backup and restore operations. The user also made changes to the configuration and deployment of the core DNS and overall infrastructure.
zerofrictionk8skubernetesk0s
juanluisvaladas/sdn
Oct 2019 - Apr 2021
Contributions:157 pushes, 32 branches in 1 year 6 months
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