Renato Zannon
Tech Lead at Creditas
São Paulo, Brazil
Summary
🤩
Rockstar🎓
Top SchoolRenato Zannon is a Tech Lead based in São Paulo with 15 years of experience building and modernizing large-scale web applications across the full stack, with deep expertise in Ruby on Rails. He has spent four years driving continuous refactoring and modernization of legacy codebases exceeding 200KLOC, reducing technical debt while preserving performance and reliability. At Creditas he progressed from software engineer to tech lead, guiding teams through cloud-ready architectures, multi-tenancy, and API design. An active open-source contributor, Renato has also patched and modernized core Rust and JavaScript libraries—work that kept projects like hyper and racer compatible with evolving compiler and language changes. He combines pragmatic engineering with attention to testing and deployment automation, and brings a background in computer science education and technical training to his leadership style.
15 years of coding experience
8 years of employment as a software developer
Bacharel em Ciência e Tecnologia, Ciências Exatas (Computação, Química, Física, Matemática e Biologia), Bacharel em Ciência e Tecnologia, Ciências Exatas (Computação, Química, Física, Matemática e Biologia) at Universidade Federal do ABCTécnico em Processamento de Dados, Programação de Computadores, Técnico em Processamento de Dados, Programação de Computadores at Escola Técnica Estadual Lauro Gomes
English, Portuguese
Stackoverflow
29,411reputation
1.5mreached
204answers
5questions
merge
top-1%
ruby
top-5%
rust
top-1%
jquery
top-5%
git
top-5%
javascript
top-1%
Github Skills (33)
asynchronous10
unit-testing10
javascript10
test-driven-design10
headers10
async10
es6-promise10
http10
refactor10
merge10
compatibility10
hyper10
parsing10
parse10
compile10
Programming languages (11)
Github contributions (5)
cujojs/when
Nov 2012 - Feb 2013
A solid, fast Promises/A+ and when() implementation, plus other async goodies.
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:70 commits in 3 months
Contributions summary:Renato primarily contributed to the core functionality and testing of the `when` library, focusing on asynchronous operations. They implemented and refined several functions, including `apply`, `call`, `bind`, and `compose`, adding features and improving their behavior. The user also added extensive tests for these functions, ensuring the reliability and correctness of the library's asynchronous promise-based operations. Furthermore, they addressed edge cases and potential performance bottlenecks within the code.
callbacksasync-awaitjavascriptpromisesasync
hyperium/hyper
Feb 2015 - Feb 2015
An HTTP library for Rust
Role in this project:Back-end Developer
Back-end DeveloperContributions:10 commits, 2 PRs, 8 comments in 2 days
Contributions summary:Renato primarily focused on fixing and updating code related to the hyper HTTP library for Rust. Their commits addressed issues in header parsing, authorization schemes, and request handling. They also updated the codebase to reflect changes in the Rust language and its associated tools, such as addressing the `rustup` changes. The user's work involved modifying core components, like headers and request/response structures, indicating a focus on improving the library's functionality and compatibility.
rustio-uringhttp-libraryhyper
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