Mario Fernandez
Software Engineer at Red Hat
Spain
Summary
🤩
Rockstar🎓
Top SchoolMario Fernandez is a software engineer based in Spain with a decade-long focus on clean code, observability, low-latency systems and real-time infrastructure across cloud-native and embedded domains. He brings hands-on experience in Go, C/C++ and Python, shipping monitoring and networking solutions at Red Hat and Ericsson for Kubernetes, OpenShift and 5G packet core environments. Mario has contributed to the widely used prometheus-operator project—improving status handling and controller safety for multi-operator deployments—demonstrating practical DevOps and observability expertise in production systems. His background in embedded Linux, security, and performance tuning (including core-dump analysis and DPI) gives him an unusual cross-stack perspective that helps bridge low-level optimization with scalable cloud services.
4 years of coding experience
7 years of employment as a software developer
Erasmus + Bachelor's Project, Erasmus + Bachelor's Project at Politecnico di TorinoMaster of Science in Telecommunications Engineering, Master of Science in Telecommunications Engineering at Universidad de CantabriaSecure WEB Applications, Secure WEB Applications at University of South WalesBachelor of Science in Telecommunications Engineering, Electronics Systems, Bachelor of Science in Telecommunications Engineering, Electronics Systems at University of CantabriaScholarship + Master's Project, Scholarship + Master's Project at Universidade Federal FluminenseMaster Software Craftsmanship Module I - Expert in architecture and software development, Master Software Craftsmanship Module I - Expert in architecture and software development at Universidad Politécnica de Madrid
Spanish, English, Italian, Portuguese
Github Skills (8)
monitoring10
kubernetes10
go10
prometheus10
devops10
kubernetes-pods10
api-design9
back-end-development9
Programming languages (4)
Github contributions (5)
prometheus-operator/prometheus-operator
Jan 2023 - Mar 2024
Prometheus Operator creates/configures/manages Prometheus clusters atop Kubernetes
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:23 reviews, 6 PRs, 29 comments in 1 year 2 months
Contributions summary:Mario primarily contributed to improving the Prometheus Operator's code. Their work involved refactoring the code to utilize `ApplyStatus` instead of `UpdateStatus` to avoid informer errors, focusing on Alertmanager, ThanosRuler, and Prometheus components. They also fixed a typo and implemented a controller ID to prevent errors with multiple operators, and improved documentation.
clustersoperatorprometheus-operatorkubernetesatop
marioferh/performance-addon-operators
Nov 2021 - Nov 2022
Operators related to optimizing OpenShift clusters for applications sensitive to cpu and network latency
Contributions:76 pushes, 30 branches in 11 months
cpunetwork-latencyclusterslatencyopenshift
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