Mario Fernandez
Staff Software Engineer at Meta
Greater Munich Metropolitan Area Germany
Summary
🤩
Rockstar🎓
Top SchoolMario Fernandez is a Staff Software Engineer with 16 years of experience building resilient, full-stack systems and shaping delivery practices across large organisations. Based in the Greater Munich area, he has led engineering teams at Meta, Wayfair, ThoughtWorks and XING, driving architecture, continuous delivery, TDD and platform work that reduced error rates and sped up releases. He combines front-end expertise (React, TypeScript, module federation) with backend and infrastructure skills (Java/SpringBoot, Kubernetes, Terraform) to turn monoliths into decoupled, observable systems. At Wayfair he architected a remote-navigation solution and automated burn-rate SLOs that cut error rates by orders of magnitude; at Meta he focused on integrity flows to prevent account compromise. A regular speaker and writer, he also contributes to open-source tooling—having added Emacs package recipes and integrations—reflecting a hands-on curiosity that often keeps him thinking about software after hours.
16 years of coding experience
13 years of employment as a software developer
Ingeniero, Informática, Ingeniero, Informática at Universidad Autónoma de MadridMSc with honors, Software Engineering, MSc with honors, Software Engineering at Technical University of Munich
German, English, Spanish
Stackoverflow
46,379reputation
2.4mreached
106answers
8questions
data-structures
top-1%
dictionary
top-1%
generics
top-5%
python
top-1%
java
top-5%
sorting
top-1%
Github Skills (22)
bit-manipulation10
package-management10
python10
emacs-lisp10
dictionary10
data-structures10
sorting10
java9
github9
ienumerable9
fileio9
generics9
version-control6
zsh6
react6
Programming languages (16)
Github contributions (5)
dimitri/el-get
Sep 2011 - May 2013
Manage the external elisp bits and pieces upon which you depend!
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:7 commits in 1 year 7 months
Contributions summary:Mario contributed to the `el-get` repository by adding and modifying recipes for various Emacs packages. They implemented recipes for new packages like `css-mode` and `revbufs`, and also updated existing recipes like `flycheck` to use GitHub directly. Their work primarily involved modifying Emacs Lisp code and package definitions related to managing external Emacs packages and dependencies. This involved directly integrating and managing external Emacs packages.
elisp
sirech/cookery2-frontend
Aug 2019 - Jan 2023
yet another cookery frontend
Contributions:1 review, 186 commits, 41 PRs in 3 years 5 months
frontend
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