
Greg J.
Senior Front-End Developer | UX/UI Designer
Salaire / Taux journalier
Paris, France
Freelance
Peut venir sur site
Expertises
Langues
À propos
Introduction
Senior front-end developer & UX/UI designer with 15+ years creating scalable web applications for major brands like Société Générale, Le Point, and Coface. Expert in React, Angular, design systems, and full project lifecycle from wireframes to deployment. Delivering pixel-perfect, performance-optimized solutions that drive user engagement and business growth.
Expérience de travail
Front-end dev & UX/UI designer
COFACEFreelance
juin 2021 - Présent
5 ans 5 mois
92270 Bois-Colombes, France
Coface is one of the leading credit insurance companies in France, supporting medium-sized and large enterprises. I joined their teams as a Lead UX/UI Designer and Front-End Developer, helping them optimize the user experience and improve the visual impact of several projects, such as Cofanet, Easy-liner, and Broker-portal... In addition to supporting them in the creation of new projects, such as Customer-portal, Showcase, and Partner-connect... 1/ Optimization, Research, and UX Design Writing audits, requirement gathering, specifications Conducting interviews, defining personas, running A/B testing campaigns Creating wireframes in Balsamiq and Figma 2/ Optimization, Research, and UI Design Standardizing projects with the group’s visual identity Creating/managing a design system in Figma Designing templates/mockups in Figma and Adobe XD 3/ Front-End Development and Integration Using native HTML5, PHP, JS and jQuery, Stylus, Sass, Less Twig and Angular templating Working in environments with Yarn, Gulp, Npm, Citrix, and versioning with Git 4/ Browser and Device Testing / Web Performance RWD pages, mobile testing for iOS + Android Resource optimization (JS, CSS, Images, etc.) / Monitoring web performance 5/ Project and Team Management Defining roadmaps, managing stories (Jira, Confluence...) in Agile (Kanban) mode Interviews/recruitment, team management (task allocation, training, reviews, etc.)
Co-founder & Front dev & UX/UI designer
BABYPOOMFreelance
nov. 2016 - sept. 2025
8 ans 11 mois
Paris, France
Babypoom is a company founded at the end of 2016, by 2 partners and myself. This is an application with a unique concept, allowing future parents to create interactive “gamified” announcements. The application is still under development, but is already experiencing growing success. The team is made up of: a CTO (who is in Martinique), from a full-stack developer (who is in San-Francisco) and an artistic director and dev. front (which is in France). In this company, I have the following responsibilities: 1/ Artistic direction Graphic identity, illustrations, animations, models (mobile/desktop), print media - Illustrator, Photoshop, After-effects 2/ UX / UI designer Creation of wireframes/mockups based on tests and user feedback Implementation of the entire design system - Balsamiq, Axure, Adobe XD (with Zero-height and In-vision) 3/ Front developer - (x)html/html5, css/css3/Sass, native JS/Jquery, React, Rails - Use of Webflow for site design - Use of Onsen (with Angular)
Front-end developer
ALTAYSFreelance
févr. 2023 - juil. 2023
6 mois
Paris, France
Altays is a French software publisher, autonomous and self-financed since its launch in 1997, committed to the digital transformation of the Human Resources function, designing solutions adapted to practices, and counting more than 500 customers, such as EDF, SNCF, LVMH , Enedis, Credit Agricole... I joined their team, as part of the redesign of their Wordpress site, as a front-end developer and, occasionally, as a UX/UI designer for certain pages. During this mission, I had the following responsibilities: 1/ Front end development and integration - Use of HTML5, PHP, native JS and Jquery - WordPress Architecture - Environments under Yarn - Use of Mailjet to set up Newsletter templates 2/ Testing and adapting to browser and device constraints - RWD Pages (Responsive) - SEO optimization (fixed markup and attributes) - Browser and device testing - Resource management optimizations (JS, CSS, Images, etc...) 3/ UX/UI design - Creation and use of models in Adobe XD - Graphic work with Adobe Photoshop and Illustrator 4/ Project management - Definition of the road-map of projects and breakdowns / estimation of tasks - Remote work task management (Google-meet) in Agile mode (kanban and Lean)
Front-end developer & Web-project manager
LE-POINTFreelance
sept. 2020 - juil. 2021
11 mois
Paris, France
Le point is a historic media in press and web format (21st most visited news sites, in 2021). I joined their teams, as a front-end developer and project manager across all environments (main site, online store, back-office, etc.). I also accompanied them in the evolution of their technical stack and the adoption of Agile methodologies. During this mission, I had the following responsibilities: 1/ Front development and integration - Use of HTML5, PHP, native JS and Jquery - Templating Twig and Smarty - Environments under Gulp, Npm, Docker, and versioning under Git 2/ Testing and adapting to browser and device constraints - Creation and management of AMP pages - RWD Pages, Mobile Tests for IOS + Android 3/ Advertising and tracking - Setting up / tracking placements (Taboola, Google Ad-manager, Hubvisor and Criteo) - Implementation / optimization of user journeys (Contentsquare, Pool, Adobe Target) - Implementation / monitoring of audience measurement tags (AT-internet / Xiti and Tag-commander) 4/ Web-performance - Monitoring of web performance with Google insights, GT metrix and Tableau - Follow-up of perfs and errors in the Google Search console (AMP, web pages...) - Resource management optimizations (JS, CSS, Images, etc...) 5/ Project management - Definition of the road-map of projects and breakdowns / estimation of tasks - Management of stories in telework (Jira, Slack, Google-meet, Miro) in Agile mode (kanban)
Front-end developer
20-MINUTESFreelance
nov. 2019 - oct. 2020
1 an
Paris, France
20-minutes is an information daily, available in press and online format. I joined the team of developers, to intervene on the front side of the different environments (information site, journalists' administration site, etc.), as well as the implementation of several technical development projects. During this mission, I was able to work, in particular, on the following projects: - Maintenance and evolution of the information site 20minutes.fr - Maintenance and evolution of the Colette design-system - Implementation and maintenance of Dark mode - Maintenance and evolution of the Member parts, Contribution, Comments, Newsletter... During this mission, I had the following responsibilities: 1/ Front development and integration - Use of HTML5, Stylus, native JS (ES6+, Ajax...), React - Templating under Symfony and Twig - Environments under Webpack, Gulp, Yarn, Npm, Docker, Ubuntu 2/ Testing and adapting to browser and device constraints - Creation and management of AMP pages - RWD pages, Mobile first, Edge+ backward compatibility, Mobile tests for IOS + Android 3/ Process, versioning and testing - Use of Git and Github + Creation of PRs for adding features - Implementation and maintenance of PHP tests with Travis 4/ Methodology - Stories management (with Zube) in Agile mode (kanban) - Management of teleworking tasks (with Slack, Google-meet)
Front-end developer & UX/UI Designer
Société GénéraleFreelance
déc. 2016 - déc. 2019
3 ans 1 mois
La défense
The Société Générale bank has set up an entity bringing together service providers with expertise in development, UX, UI, etc. responsible for maintaining and developing front-end environments. During this mission, I have the following responsibilities: 1/ Front development and integration - (x)html/html5, css/css3/Sass and native JS/Jquery - Use of Angular 1, React, and Vue.js - RWD pages, IE7 backward compatibility, addition and management of tracking tags 2/ Resources and development - Development of POC in JS, PHP, Creation of animations (JS/CSS/SVG, Canvas...) - Optimization of internal process tools (PHP, JS, JSON...) and docs (under Confluence) 3/ Methodology and maintenance - Story management (with Jira) in Agile (kanban) and Scrum mode - Getting started with internal CMS (based on Open-text) for content management
Front-end developer & Art director
pepites-design.frFreelance
janv. 2015 - déc. 2016
2 ans
78580
Pepites-design.fr is a company dedicated to web development and graphic design, which I created in 2015. I offer services in the following areas of expertise: 1/ Front-end development - Development of projects with CMS (Wordpress, Drupal and Pretashop) and "from scratch" - Responsive projects, W3C compliant and SEO standards, and compatible with all browsers 2/ Back-end development - Development (PHP) of Wordpress and Drupal themes - Development and implementation of personalized back-offices - Optimization of site performance and security (cache, CDN, HTTP headers, etc.) 3/ Graphics and web design - Web and print artistic directions (logos, illustrations and animations) 4/ Project management - Advice, customer support and project monitoring - Monitoring and implementation of technical frameworks (hosting, DNS, etc.) - Drafting of documents (specifications, documentation, etc.) Examples of projects: lacliniquedutapis, icietlavillas, terroir-nova, makila, nerd-pirate, collectiveregardscroises, selftissus, outillage-btp, premiercadeau...
Lead integrator, graphic designer and project manager
Ciblo.net
sept. 2007 - oct. 2014
7 ans 2 mois
Paris, 75017
Ciblo is a Parisian full-service communications agency. I had the following responsibilities: 1/ Integration manager - Front-end development of web projects (e-commerce and showcase sites) - Responsive projects, W3C compliant and SEO standards, and compatible with all browsers - Ruby (with Ruby-on-rails), (x)html/html5, css/css3 and JS/Jquery 2/ Graphic designer and web designer - Creation of models, mood boards and graphic charters for websites - Design of logos, illustrations and Flash animations 3/ Project manager - Project follow-up and customer relationship - Creation of documents (specifications, site mock-ups, etc.) - Management of the interaction between cells
Graphic designer
Ryckaert
janv. 2005 - déc. 2006
2 ans
95170 Deuil-la-Barre, France
I was in charge of creating and updating web and print catalogs and creating banners.
Formation
Université Paris 8
L1 distance computing license (1st year)
2012 - 2013
2 ans
Ecole Entreprises-&-formations, Montreuil
"Multimedia developer" training
2007 - 2008
2 ans
Institut Bgs-Conseils, 75015
“DPA / C.A.O graphic designer” training
2006 - 2007
2 ans
Université Paris Nanterre
DAEU littéraire
2004 - 2006
3 ans
Licences et certifications
icSTD - Certification Scrum Team Developper
Délivré le : sept. 2020
icPO - Certification Product owner
Délivré le : sept. 2020
icSM - Certification Scrum master
Délivré le : sept. 2020