João Palmeiro
Data Visualization Engineer
Lisbon, Lisbon, Portugal
Summary
👤
Senior🎓
Top SchoolJoão Palmeiro is a Data Visualization Engineer with eight years of experience designing and implementing visual analytics for financial crime detection and model investigation. Based in Lisbon and currently at Feedzai, he blends front-end craftsmanship with data-science sensibilities—authoring papers and blog posts on data drift visualization and maintaining a themed Altair charting approach. He contributed UI and theming improvements to the widely used JupyterLab project, showing attention to polish and developer UX. João’s background spans full‑stack roles, research internships (including a master’s thesis tool for ML evaluation), and leadership in student organizations, reflecting strong communication and cross-disciplinary collaboration. He combines a formal MSc in Big Data with practical design training and photography interests that inform his emphasis on clear, well-styled visualizations.
8 years of coding experience
4 years of employment as a software developer
MSc, Analysis and Engineering of Big Data, 17/20, MSc, Analysis and Engineering of Big Data, 17/20 at Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa - FCT NOVAUser Experience & User Interface Design, 19/20, User Experience & User Interface Design, 19/20 at EDIT. - Disruptive Digital EducationWorkshop de Adobe Lightroom/Adobe Lightroom Workshop (24h), Workshop de Adobe Lightroom/Adobe Lightroom Workshop (24h) at Instituto Português de FotografiaNew Year’s Course (25h), Introduction to Data Journalism, 20/20, New Year’s Course (25h), Introduction to Data Journalism, 20/20 at NOVA FCSHMinor, History and Philosophy of Science, 18/20, Minor, History and Philosophy of Science, 18/20 at Faculdade de Ciências da Universidade de LisboaBSc, Information Systems and Computer Engineering, 13/20, BSc, Information Systems and Computer Engineering, 13/20 at Instituto Superior TécnicoBasic (2º and 3º cycle) and Secondary Education, Sciences and Technologies, Basic (2º and 3º cycle) and Secondary Education, Sciences and Technologies at Escola Básica e Secundária Dr. Hernâni Cidade
Portuguese, English
Github Skills (10)
customizer10
css10
uid10
javascript10
custom-theme10
front-end-development10
ui-design10
customisation10
jupyterlab10
ui-components9
Programming languages (15)
Github contributions (5)
jupyterlab/jupyterlab
Dec 2022 - Dec 2022
JupyterLab computational environment.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:21 reviews, 1 commit, 22 PRs in 1 day
Contributions summary:João's contributions primarily involve enhancing the user interface and visual presentation of JupyterLab. Their work includes adopting theme CSS variables for various UI components, such as input fields, go-to-line input, and the "expand a collapsed cell" button, improving the application's theming consistency. The user also standardized placeholder content and button labeling, resulting in a more cohesive user experience. The user also focused on the addition and modification of icons, updating the copyright year, and adjusting alignment and cursor for running session icons.
jupyterlab-extensionjupyterlabjupyter-widgetjupytercomputational
feedzai/feedzai-altair-theme
Apr 2022 - Jan 2023
Feedzai's theme for Altair charts.
Contributions:2 reviews, 28 commits, 6 PRs in 8 months
chartspythonaltair-themesfeedzaidata-visualization
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.