Sergio Leiva

Pozuelo de Alarcón, Community of Madrid, Spain

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Summary

🤩

Rockstar

🎓

Top School

Sergio Leiva is a product and design-driven technology leader with 15 years of experience founding and scaling data-focused companies, including co-founding CARTO and Vizzuality where he built product and design teams of 40+ and 20+ respectively. He blends hands-on front-end craftsmanship—demonstrated by contributions to notable open-source projects like carto.js and improvements to CartoDB's UI and formatting—with strategic product leadership as CPO, board member, and current VC and product advisor. His work sits at the intersection of location intelligence, data visualization and conservation, having delivered products and projects for organizations such as NASA, Google and the World Resources Institute. Comfortable shifting between code, design and strategy, he has a track record of turning complex geospatial data into usable, decision-driving products. Based in Madrid, he also teaches and advises, bringing a mix of academic grounding in computer science and practical HCI expertise to mentoring the next generation of designers and founders. A less obvious strength is his longevity in both building engineering teams and contributing code-level UX fixes, signaling rare fluency across execution layers from CSS tweaks to product-market fit.

15 years of coding experience

11 years of employment as a software developer

Master, HCI & Interaction Design, Master, HCI & Interaction Design at Programa Vostok II

Computer Science, Computer Science at Universidad Rey Juan Carlos

English

Github Skills (10)

html10

css10

javascript10

front-end-development10

d3js9

ui-design9

testing8

geolocation7

geospatial6

cartodb5

Programming languages (7)

TypeScriptShellCSSPLpgSQLJavaScriptHTMLPython

Github contributions (5)

CartoDB/cartodb

Mar 2011 - Jul 2016

Location Intelligence & Data Visualization tool

Role in this project:

Front-end Developer

Contributions:215 commits, 46 PRs, 51 pushes in 5 years 4 months

Contributions summary:Sergio primarily focused on improving the formatting of numbers within the `cartodb` project. They made several changes to `src/formatter.js` to handle precision for small and negative values, and also added and updated unit tests in `spec/formatter.spec.js` to ensure the correct formatting. Further modifications involved fixing linting issues and making adjustments to the user interface, specifically in the search paginator, to show points only when needed.

visualizationgeospatialgeofencinggeographyh3

CartoDB/carto.js

Jul 2012 - Jul 2015

CartoDB javascript library

Role in this project:

Front-end Developer

Contributions:11 commits, 1 PR, 4 pushes in 3 years

Contributions summary:Sergio primarily contributed to the front-end aspects of the `carto.js` library. They fixed an issue related to template rendering, adding an error message when a template is missing. Other commits demonstrate work on the example applications, including adding and improving the UI, style fixes, and improving the bounding box example and cursor interaction example. This indicates the user's focus on improving the user experience and functionality through front-end modifications and example implementations.

javascriptnodejsjavascript-librarycartodb

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