"Lead Front" = abbreviation for "Lead Front End Developer"

the "Front End" being the part of the application that is "in front" of the users, also known as "user interface".

"... a strong background in UX ..."
http://www.deezer.com/company/key_people

see
Lead UI/UX Designer – Data Visualization
http://www.linkedin.com/jobs2/view/18322474

Web Developer with strong UX background (Partially remote)
http://www.linkedin.com/jobs2/view/16388113


http://poincare.matf.bg.ac.rs/~stasa/IS/seminarski.pdf

http://ms1pki.etf.rs/predavanja/PKI 01.pdf

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Note added at 22 hrs (2014-09-12 04:59:42 GMT)
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How To Get Started In UX Design
http://uxmastery.com/how-to-get-started-in-ux-design/


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Note added at 22 hrs (2014-09-12 05:02:59 GMT)
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Get Started in UX: the complete guide to launching a career in user experience
http://uxmastery.com/get-started-in-ux/

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Note added at 22 hrs (2014-09-12 05:08:46 GMT)
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"user experience" is a bit more elaborated way of looking at the interaction between the user and the application, so "korisnički interfejs" might be a little restrictive OTOH I don't know of any usual translation for "user experience" - i.e. how the user feels about using some software.

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Note added at 1 day2 hrs (2014-09-12 09:05:25 GMT)
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"... User experience
From Wikipedia, the free encyclopedia

User Experience (UX) involves a person's behaviors, attitudes, and emotions about using a particular product, system or service. User Experience includes the practical, experiential, affective, meaningful and valuable aspects of human-computer interaction and product ownership. Additionally, it includes a person’s perceptions of system aspects such as utility, ease of use and efficiency. User Experience may be considered subjective in nature to the degree that it is about individual perception and thought with respect to the system. User Experience is dynamic as it is constantly modified over time due to changing usage circumstances and changes to individual systems as well as the wider usage context in which they can be found. ..."

http://en.wikipedia.org/wiki/User_experience

User experience design

User experience design (UXD or UED) is the process of enhancing customer satisfaction and loyalty by improving the usability, ease of use, and pleasure provided in the interaction between the customer and the product. User experience design encompasses traditional human-computer interaction (HCI) design, and extends it by addressing all aspects of a product or service as perceived by users. User experience is any aspect of a person's interaction with a given IT system, including the interface, graphics, industrial design, physical interaction, and the manual.

http://en.wikipedia.org/wiki/User_experience_design