Francisco Jiménez is an experienced engineering manager based in London with 15 years leading mobile and web engineering teams at companies including Facebook, Deliveroo, Mozilla and Yahoo. He combines hands-on front-end expertise—evidenced by contributions to Mozilla’s Gaia dialer UI—with a track record of building and scaling product-focused teams across consumer mobile, connected devices and platform initiatives. At Mozilla he led efforts on Firefox OS and Connected Devices, exploring voice, computer vision, sensors and the Physical Web, and at Telefónica and INQ he drove mobile client development for emerging phone experiences. Known as an open source advocate and former Yahoo and Mozilla engineer, he balances technical depth with people leadership to ship user-facing systems. Not obvious from his headline: he has repeatedly bridged researchy, experimental projects and production delivery, making him adept at turning prototypes into shipped products.
DEPRECATED - Gaia is a HTML5-based Phone UI for the Boot 2 Gecko Project. NOTE: For details of what branches are used for what releases, see
Role in this project:
Front-end Developer
Contributions:844 commits, 167 PRs, 118 pushes in 3 years 7 months
Contributions summary:Francisco primarily worked on the user interface of the dialer application, focusing on the HTML and JavaScript code. They fixed bugs related to drag-and-drop functionality within the dialer keypad, ensuring the user's interaction with the number input was improved. Further contributions involved updating the visual layout and text in the dialer interface, by correcting call duration formatting, and adjusting for RTL layouts and improved scrolling. This work is evident from the code changes to HTML, JavaScript, and CSS files related to the dialer app.
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Francisco Jiménez - Engineering Manager at Facebook