Juan Lopes
Staff Software Engineer at Uber
Rio de Janeiro, Brazil
Summary
👤
Senior🎓
Top SchoolJuan Lopes is a Senior Staff Software Engineer based in Rio de Janeiro with 17+ years of hands-on experience building high-performance, scalable systems. At Zwift he engineered spatial partitioning and custom data structures that enabled servers to handle hundreds of thousands of concurrent players and increased game-server capacity by 500%, while also delivering company-wide debugging and test automation used by 100+ engineers. Previously a lead R&D engineer at Intelie, he designed a DSL for distributed event processing and drove core platform capabilities, and earlier built a custom web framework in production. Academically grounded with advanced graduate study in systems engineering and computational sciences, he blends deep algorithmic expertise—demonstrated in open-source algorithm implementations and optimizations—with pragmatic leadership in production systems. An unexpected detail: he applied tail-call optimization and added a Fenwick tree implementation to a public algorithms JS repo, showing both low-level algorithmic care and a commitment to community tooling.
17 years of coding experience
18 years of employment as a software developer
Ph.D. (incomplete, ABD), Systems Engineering, Ph.D. (incomplete, ABD), Systems Engineering at Federal University of Rio de JaneiroM.Sc., Computational Sciences, M.Sc., Computational Sciences at UERJ
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 (18)
algorithm10
algorithms10
javascript10
math10
data-structure10
data-structures10
database10
sorting-algorithms10
lookup9
java9
big-o9
sorting9
time-complexity9
dynamic-programming6
hyperloglog6
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.
data-structuredata-structuresjavascriptbinary-treesgraph
intelie/pipes-docs
Apr 2014 - Apr 2020
Contributions:112 commits, 54 pushes in 6 years 1 month
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