Alex Fernández
Head Of Engineering at Full Circle_Digital Experts
Madrid, Community of Madrid, Spain
Summary
🤩
Rockstar🎓
Top SchoolAlex Fernández is a seasoned engineering leader and ex-CTO with 17 years of hands-on experience building highly scalable backend systems and leading cross-functional teams from Madrid. Currently Head of Engineering at Full Circle_Digital Experts, he has driven high-throughput data ingestion and performance work (e.g., systems ingesting millions of events per second at Devo) and modernized architectures across startups and enterprises. A pragmatic Python advocate who codes in JavaScript by choice, he contributes to practical open-source tooling like a load-testing engine that he migrated to ES6 and refactored for accurate latency measurement. His background ranges from fintech and ad tech to influencer marketing and energy billing, where he once cut invoice generation from a week to four hours by migrating to Node.js. Comfortable toggling between CTO-level strategy and core engineering, he brings a physics-trained analytical mindset to solving performance and reliability challenges.
17 years of coding experience
20 years of employment as a software developer
Bachelor's degree Physics, Bachelor's degree Physics at Universidad Autónoma de Madrid
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (9)
nodejs10
javascript10
performance-monitor10
performance-analysis10
mstest10
teste10
ui-testing10
testing9
refactoring9
Programming languages (14)
Github contributions (5)
alexfernandez/loadtest
Jun 2013 - Nov 2020
Runs a load test on the selected URL. Fast and easy to use. Can be integrated in your own workflow using the API.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:11 reviews, 66 commits, 73 PRs in 7 years 6 months
Contributions summary:Alex primarily focused on improving the load test functionality and its codebase. Key contributions include migrating the project to ES6, refactoring the timing and latency measurement, incorporating error code handling, and fixing keep-alive connections. They addressed a reported bug related to URL replacement and implemented the core logic for the load test engine. The user also refactored parts of the code and separated timing logic into latency and hrtimer modules.
loadtestloadtestingnodejsperformancetesting-tools
alexfernandez/librecounter
Oct 2023 - May 2026
Free and open website statistics
Contributions:1 review, 49 PRs, 171 pushes in 2 years 7 months
statistics
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