Juan Lopes
Senior Staff Software Engineer at Zwift
Rio de Janeiro, Brazil
Summary
👤
Senior🎓
Top SchoolJuan Lopes is a senior software engineer with 17+ years of experience, currently driving scalable systems at Zwift as Senior Staff Software Engineer in Rio de Janeiro. He combines systems engineering, optimization, and data structures, with depth in algorithms, compilers, and performance tuning. He has led R&D at INTELIE by Viasat and has a track record at Zwift of boosting Game Server capacity by over 500% and building test automation tools used by 100+ engineers. He contributed to open-source projects, including felipernb/algorithms.js, implementing Fenwick trees, refactoring code, and applying tail-call optimization to quicksort, showcasing practical algorithm engineering. He has advanced academic training with MSc in Computational Sciences and ongoing PhD work in Systems Engineering and CS, reflecting a strong theoretical foundation complementing production impact. Based in Rio de Janeiro, he bridges research, design, and delivery to scale real-time multiplayer systems.
17 years of coding experience
16 years of employment as a software developer
Ph.D. (incomplete, ABD), Systems Engineering and Computer Science, Ph.D. (incomplete, ABD), Systems Engineering and Computer Science at Federal University of Rio de JaneiroB.Sc., Informatics and Information Technology, B.Sc., Informatics and Information Technology at Universidade do Estado do Rio de Janeiro
Portuguese, English
Stackoverflow
10,222reputation
805kreached
262answers
6questions
database
top-1%
data-structures
top-1%
big-o
top-5%
sorting
top-5%
time-complexity
top-5%
java
top-5%
Github Skills (20)
algorithm10
algorithms10
javascript10
math10
data-structure10
sorting-algorithm10
javascripts10
data-structures10
database10
sorting-algorithms10
lookup9
java9
big-o9
sorting9
time-complexity9
Programming languages (11)
Github contributions (5)
felipernb/algorithms.js
Feb 2015 - Feb 2015
Atwood's Law applied to CS101 - Classic algorithms and data structures implemented in JavaScript
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 commits, 2 PRs, 7 comments in 7 days
Contributions summary:Juan primarily focused on implementing and refining data structures and algorithms within the repository. They added a Fenwick tree implementation, including both the core data structure and associated tests. Furthermore, the user refactored and improved existing code by fixing spacing and adding comments. Finally, the user applied a tail call optimization to a quicksort implementation.
lawjavascriptalgorithms-and-data-structuresbinary-treesgraph
intelie/pipes-docs
Apr 2014 - Apr 2020
Contributions:112 commits, 54 pushes in 6 years 1 month
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