Freelancer profile translated to English.
Back to original languageAbout Julien
Is your site slow and you don't know how to fix it? Are you wondering what budget to allocate to performance? I can support you by offering:
- Audit: understand where you stand and analyze areas for improvement
- Monitoring: implementation of tools that allow you to truly understand the experience of your users, correlation with business impact, monitoring of regressions, implementation of performance budgets
- Development: fixing your performance issues so you can start from a healthy foundation
- Training: mentoring your teams to build a performance culture and make you autonomous afterwards
I offer these services with a commitment to providing a pragmatic, data-driven, and transparent vision. My primary goal is to build a solid foundation with you, enabling you to prioritize and fix short-term slowdowns (e.g., before a key date for your company), while also providing you with the tools to maintain good long-term performance.
I have built this expertise by working for over 9 years in the e-commerce sector, which is particularly demanding in terms of Web Performance.
Finally, whether your stack is in React, Svelte, or simply uses no framework, I can adapt to it, as the analysis processes are generic.
So, shall we discuss it?
French
Native or bilingual
English
Native or bilingual
Remote only
Primarily works remotely
Experience
- SINGULARTStaff Frontend EngineerE-COMMERCEApril 2021 - January 2024 (2 years and 10 months)First online art gallery featuring over 10,000 international artists. My role evolved from Senior Engineer to Staff Engineer in a team that grew from 5 to 25 people:- Structuring Front-End development best practices (Components, Atomic Design, BEM, automated tests, CI, etc.)- Architect for strategic product initiatives (product-oriented feedback, progressive delivery, A/B test analysis)- Improvement of Web Performance and Core Web Vitals (Mobile LCP < 2.4s from 65% to 92%)- Proposal and development of tools to improve Front-End/Back-End collaboration (RFC, ADR, Roadmaps)- Lead of the Front-End Guild responsible for creating the Design System and its progressive adoption- Recruitment of the Front-End team (technical tests and interviews)- Mentoring 15 Front-End & Full-Stack developers (training, internal meetups, reviews, pair programming)
- Front-CommerceWeb EngineerSOFTWARE PUBLISHINGDecember 2018 - March 2021 (2 years and 3 months)Toulouse, FranceCreation and maintenance of a performance-oriented e-commerce framework:- E-commerce theme and Design System (React, Apollo, SSR, Storybook…)- Implementation of advanced tooling scripts (Webpack, Babel, RxJS…)- GraphQL API (NodeJS) and connection to external services (Magento, Wordpress, Prismic…)Training and support for teams using the productDedicated documentation for integrators of the solutionBy training teams on the use of Front-Commerce and auditing their projects, this notably allowed Devialet to increase its conversion rate by +100% and Kaporal to decrease its bounce rate by -60%.
- Occitech - Studio d'innovationWeb EngineerMarch 2016 - February 2020 (3 years and 11 months)Toulouse, FranceDevelopment of specific web applications:- Needs analysis and solution recommendations- Implementation of complex systems (Event Sourcing, CQRS, …)Maintenance of E-commerce applications on Magento (PHP):- Creation of custom extensions- Creation of complete themes- Upgrading stores to the latest Magento versions- Bug fixing
Reviews
Michel
Pmilinvest
Reviewed on 12/16/2024
Julien is fast and efficient. Good understanding of our request and responsive in providing solutions.
Aldo
AldoHermes
Reviewed on 2/26/2024
Excellent experience with Julien. Extremely precise work and very clear communication, far from previous experiences we've had on web performance topics.
Julien helped us clearly define what we needed, and was able to identify and prioritize all the points we needed to work on to achieve our performance goals.
Are you looking for a REAL web performance expert? You can go with him with your eyes closed.
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Education
- CPGE - Preparatory Classes for Grandes Ecoles, MPSI/MPLycée Louis Barthou2012CPGE - Classes Préparatoires aux Grandes Ecoles, MPSI/MP
- BaccalaureateLycée Jacques Monod2010Baccalauréat