Joao Sa
Staff Software Engineer at Zepz
Paris, Ile-de-France
Summary
👤
Senior🎓
Top SchoolJoao Sa is a Staff Software Engineer with 13 years building resilient, data-driven systems across fintech, government, and startup environments, currently leading AML and financial crime engineering in Paris. He combines hands-on full-stack skills (Python, Java, Postgres, Kubernetes, Spark) with cloud and DevOps experience to replatform legacy services, reduce costs, and improve operational detection and reporting. At Sendwave and Zepz he drove fraud and AML initiatives, architecting customer risk rating and alerting systems that bridge ML, data engineering, and compliance workflows. As a consultant he led large-scale record linkage projects (70M records) using Spark and ML, demonstrating unusual expertise in de-duplication at national scale. An active open-source contributor, he has improved UX and tag handling for the popular orgmode Neovim plugin and stabilized cross-platform test suites for Tridactyl. Fluent in English after eight years in the US, he blogs occasionally at joaomsa.com and blends pragmatic engineering with regulatory-minded product delivery.
13 years of coding experience
12 years of employment as a software developer
Bachelor's degree Computer Science, Bachelor's degree Computer Science at Pontifícia Universidade Católica do Rio Grande do Sul
English, Portuguese, French
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (16)
neovim10
lua10
javascript10
tree-sitter10
selenium-ide10
webdriver10
selenium10
org-mode10
test-automation10
testing10
vim9
windows9
nvim-cmp7
firefox5
git5
Programming languages (9)
Github contributions (5)
nvim-orgmode/orgmode
Apr 2022 - Nov 2022
Orgmode clone written in Lua for Neovim 0.10.0+.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:6 commits, 5 PRs, 4 comments in 7 months
Contributions summary:Joao primarily contributed to the `orgmode` Neovim plugin by implementing features related to tag manipulation and the user interface. Their work includes adding a configurable tags column, utilizing tree-sitter for tag handling, and enhancing headline functionalities with level and archived status. They also made adjustments to the display of markup and resolved issues related to the todo keyword highlights, improving the overall functionality and user experience of the plugin.
luacoc-nvimneovim-luanvim-cmpvim
tridactyl/tridactyl
Sep 2018 - Jun 2019
A Vim-like interface for Firefox, inspired by Vimperator/Pentadactyl.
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:7 commits, 4 PRs, 4 comments in 8 months
Contributions summary:Joao primarily focused on improving the project's test suite and ensuring its reliability. This included fixing end-to-end tests, particularly on the Windows platform, and addressing issues related to timing and configuration. The commits also involved modifications to test scripts and adjustments to wait times, indicating an effort to stabilize the testing environment. Overall, the contributions focused on maintaining and enhancing the automated testing infrastructure.
firefoxvim-likevimvimperatorwebextension
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