I am Jimmy Mostovoi

Fullstack Web Developer

I help companies build high-performing, useful and scalable web solutions.

→ 30+ web projects developed and launched
→ 50+ projects I have contributed to
→ 100% satisfied clients

Contact

Favorite stack

Skills

How I can help

AI automation Implementation of intelligent workflows to automate repetitive tasks, save time and improve productivity.

AI tool integration Integration of artificial intelligence solutions into your tools, applications or business processes.

AI assistants Creation of conversational assistants capable of answering, guiding users and automating part of your support or sales process.

Business digitalization Support with digitalizing and automating different parts of your business.

Web development Redesign or creation of a new project from scratch.

Web integration Integration of new features into your existing application and debugging.

Bug fixing Identifying, fixing and preventing bugs to ensure your application remains stable and reliable.

Performance optimization Improving the speed, fluidity and overall performance of your web applications.

Web maintenance Maintenance, evolution and security of your project to ensure long-term stability and smooth operation.

Clients

I supported them

L'Oréal

IAF

VYZYO

GPHJ

Kérastase

Black Meridian

YUNUSPay

TAK

View all clients (16)

A few examples of completed projects

My portfolio

View →

Custom CMS for a luxury events agency

SvelteKit

Strapi

Node.js +7

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Migration from Looker Studio to Metabase for an e-commerce business

Metabase

Looker Studio

PostgreSQL

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Development of the Grand Prix de la Haute Joaillerie webapp

SvelteKit

Supabase

Node.js +7

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Development of a SaaS for residence managers in Algeria

SvelteKit

PocketBase Node.js

Node.js +6

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Launch of an e-commerce project in Eastern Europe

SvelteKit

Supabase

Node.js +13

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Internalization of a high-traffic web app for a global cosmetics leader

Svelte

Node.js

Vite +4

View all projects (14)

Skills adapted to your needs

Tools

What my clients say about me

Testimonials

Christian Bergeret Trafic Factory Founder / Digital marketing expert -

E-commerce website development Trafic factory - March 2026

★★★★★

"Cela fait maintenant 5 ans que je travaille avec Jimmy, et la qualité de son travail a toujours été constante. Il est sérieux, impliqué et toujours fiable dans l’exécution. Merci encore pour ces années de collaboration, et j’espère sincèrement que nous continuerons à travailler ensemble encore longtemps." -

Elodie Reygner Kalfon The Officin Communications manager -

Web application development The Officin - January 2026

★★★★★

"Merci Jimmy pour le développement du site de notre agence et de son CMS sur mesure. Aujourd’hui nos équipes marketing mettent à jour les contenus facilement. Une collaboration efficace et un travail sérieux." -

Jean-Bernard Grasset Profirst Digital creative director -

Web application development Le Grand Prix de la Haute Joaillerie - August 2025

★★★★★

"Merci beaucoup Jimmy pour ton implication sur la 1ère édition du Grand Prix de la Haute Joaillerie. Le développement a été mené avec une grande rapidité et la communication a été excellente à chaque étape. Grâce à cela, l’opération a été une vraie réussite, avec plus de 10 000 votes par jour. Une collaboration aussi agréable qu’efficace." -

Maéva Pompui Freelance -

Website development March 2025

★★★★★

"Un grand merci à Jimmy pour la création de mon site. Il a su comprendre mon univers, mes besoins et créer rapidement un site à la fois professionnel, apaisant et efficace. Aujourd’hui, il me permet d’être visible et d’attirer de nouveaux patients sans avoir à engager de frais supplémentaires. Je suis ravie du résultat et je recommande Jimmy très chaleureusement pour son sérieux, sa réactivité et la qualité de son travail." -

Jéhu Ndoumi Yunus Group SA CEO -

Web application development Yunus Group SA - February 2023

★★★★★

"Jimmy a réalisé un excellent travail sur mon projet web. Sérieux, rapide, à l’écoute et très compétent, il a su proposer des solutions pertinentes à chaque étape. Je le recommande sans hésitation." -

Vj Odedra VYZYO CEO -

Web application development VYZYOPay - January 2023

★★★★★

"Congratulations to our talented colleague for the brilliant redesign and development of our company's website. Thanks to your expertise, our site now truly reflects our company and has become a remarkable showcase for our products. your work is a major asset to our success. Well done! " -

Guillaume Robert Black Meridian Partner -

Web integration Black Meridian - September 2021

★★★★★

"Merci pour ton très bon travail. Ta précision est admirable, tu as enrichis considérablement notre site, offrant une expérience utilisateur au top. Merci pour ton engagement." -

Guilhem Schiltz Optimize matter Data marketing consultant -

Lead generation via Facebook Ads Le 71 - May 2021

★★★★★

"Travailler avec Jimmy a été une expérience enrichissante professionnellement et personnellement. Jimmy est fondamentalement pragmatique et efficace, ce qui est rafraîchissant lors de la mise en œuvre d'un projet data." -

Steve Terell Burden bearers Entrepreneur

Implementation of a web data tracking solution Burden bearers - July 2021

★★★★★

"Again, a special freelancer who has a total grasp of the necessary digital marketing tools and loop. Not just a specialized knowledge of only one component or part of the online marketing needs, but with an understanding of all working parts and how to make them build your website traffic and presence."

Grégoire Charrassin Design Fiction Studio Co-founder of Design Fiction Studio | Independent Web & Graphic Designer -

Interface design Hetic - January 2021

★★★★★

"Je garde d'excellents souvenirs de Jimmy, que j'ai rencontré lorsqu'il était étudiant. Lors de mes interventions, il savait faire preuve d'une grande ténacité, d'une vraie curiosité et d'un dévouement sans faille pour ses études, qui le passionnaient." -

6+ years of experience in web

My Resume

2020 - 2026 Professional experience

Freelance Fullstack Web Developer Self-employed (2024 - 2026)

💠 From Mexico, I support direct clients and French agencies in designing and developing custom web solutions. As a fullstack developer, I work on both front-end and back-end, with an approach focused on performance, reliability and ease of use.

✔️ Design, creation and redesign of websites, applications and business platforms tailored to each project’s needs.
✔️ Development of modern, fast and intuitive interfaces designed to provide an excellent user experience.
✔️ Implementation of back-ends, databases, APIs and custom CMS solutions to enable efficient and sustainable content and feature management.
✔️ Takeover, bug fixing, maintenance and evolution of existing projects with strong attention to stability, security and technical quality.
✔️ Close collaboration with clients and agencies to deliver reliable, scalable and genuinely useful web solutions.

⚙️ Svelte, SvelteKit, React, Next.js, JavaScript, TypeScript, Node.js, PostgreSQL, Supabase, Strapi, HTML, CSS, Tailwind, Git, GitHub, REST API, Figma

⭐ 100% client satisfaction
⭐ 20+ clients supported

Read more ↓

Fullstack Developer — Shopify Tiffany Levain (February - March 2026)

💠 Development of a fully custom Shopify online store for Tiffany Levain, an artisan florist. The challenge: provide a smooth and differentiated shopping experience to allow her to leave third-party florist marketplaces she depended on.

✔️ Integration of complex business logic adapted to the floral industry: product availability, delivery zones and order customization.
✔️ Development of a fully custom Shopify theme reflecting the brand’s artisanal universe and visual identity.
✔️ Concrete result: Tiffany was able to completely move away from third-party florist marketplaces and recover around 30% additional margin on each sale.

⚙️ Shopify, Liquid, JavaScript

⭐ Complete stop of florist marketplaces
⭐ +30% margin recovered per sale

Read more ↓

Fullstack Web Developer The Officin (November 2025 - January 2026)

💠 Creation of The Officin agency website with a custom headless CMS developed with Strapi, allowing the marketing team to easily update content without technical skills.

✔️ Full design and development of the website in SvelteKit/TypeScript, with strong attention to performance and smooth navigation.
✔️ Fine optimization of requests to the Strapi headless CMS and implementation of a custom middleware for media management — many high-quality visuals served with infrastructure costs limited to around €50/month.
✔️ Delivery of a simple, fast and robust interface used daily by 7 people on the team.

⚙️ SvelteKit, TypeScript, Strapi, Node.js, REST API

⭐ 7 daily users — 100% satisfaction
⭐ ~€50/month infrastructure despite a large media volume

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BI Developer Sodiclaire (October 2025 - February 2026)

💠 Complete migration of Sodiclaire’s reporting system from Looker Studio to Metabase. The initial problem was simple: Looker Studio had become unusable due to the company’s data volume — extremely long loading times, frozen dashboards and productivity loss for the teams.

✔️ Audit of the existing setup and identification of bottlenecks in the Looker Studio data pipelines.
✔️ Migration and rewriting of reports and dashboards in Metabase, with PostgreSQL data modeling and SQL query optimization for significantly better performance.
✔️ Design of clear, readable and actionable dashboards adapted to the needs of different business teams.
✔️ Delivery of a smooth and fast reporting environment, even with large data volumes.

⚙️ Metabase, Looker Studio, PostgreSQL, SQL

⭐ Dashboard loading time reduced from 5 minutes to 30 seconds
⭐ Immediate adoption by the teams

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Fullstack Web Developer Grand Prix de la Haute Joaillerie (August - October 2025)

💠 Development of the official public voting platform for the first edition of the Grand Prix de la Haute Joaillerie, a prestigious event held in Monaco. The platform allowed internet users to vote for their favorite creations throughout the event.

✔️ Complete development of the platform in SvelteKit/TypeScript with Supabase for data and real-time vote management.
✔️ Architecture designed to handle high traffic peaks: up to 10,000 votes per day with no service interruption.
✔️ Zero bugs reported during the entire event — complete reliability in a high-visibility context.
✔️ Delivered on time for the opening of the event, with smooth communication throughout the project.

⚙️ SvelteKit, TypeScript, Supabase

⭐ 10,000 votes/day at peak
⭐ 0 bugs — 100% availability during the event

Read more ↓

Lead Front-End Developer FINAVAS (2022 - 2024)

💠 Reference point for front-end web development topics. Web development for the projects of the different subsidiaries of the VYZYO group — TAK, Yunus, Skool and more. The missions entrusted to me were mainly related to web development, including redesigns or creation of showcase websites and administration interfaces. VYZYO is a dynamic company focused on digital innovation, and my role was to lead initiatives aimed at strengthening our clients’ online presence and maximizing their market impact.

✔️ Full management of web and marketing projects, from planning to implementation, monitoring and evaluation of results.
✔️ Coordination of internal and external teams to ensure efficient and timely project delivery while respecting budgets and deadlines.
✔️ Creation of a WordPress site network to simplify administration and monitoring.
✔️ ASO for a mobile banking application.
✔️ Complete redesign of administration interfaces for a core banking system. Front-end design and development, including notable interfaces: KYC, registration, marketing, accounting, account search and account details.
✔️ Implementation of effective data tracking solutions fully compliant with GDPR.
✔️ Training developers to help them improve their skills.
✔️ Strong knowledge of FinTech and Mobile Financial Services.

⚙️ HTML, CSS, JS, PHP, jQuery, SvelteKit, API, Node.js, Chart.js, CodeIgniter, Cropper.js, PWA, WP, Matomo, Figma, Photoshop

⭐ Administration platform used by 50+ people, 100% satisfaction
⭐ Delivered solutions to previously unresolved technical problems
⭐ Significant improvement in the skill level of my colleagues

Read more ↓

Freelance Web Developer & Digital Marketing Specialist Self-employed (2021 - 2022)

💠 I worked independently from Mexico while providing services to direct clients and French agencies. This unique experience allowed me to combine my passion for web development and digital marketing while exploring new horizons and gaining valuable professional autonomy.

✔️ Creation and redesign of professional websites, working closely with clients to understand their specific needs and deliver tailor-made solutions.
✔️ Implementation of data tracking and data visualization systems to help clients understand and leverage their online performance.
✔️ SEO optimization to improve website visibility and rankings in search engines, leading to increased organic traffic and conversions.
✔️ Collaboration with digital marketing agencies to support their teams on web development and digital strategy projects.
✔️ Consulting and training for clients to help them maximize their online presence and achieve their business goals.

⚙️ Google Search Console, Google My Business, Google Data Studio, Google UA, GA4, GTM, Google Sheets, GMC, SEMRush, XENU, Figma, HTML, CSS, JS, PHP, jQuery, WP

⭐ 100% client satisfaction
⭐ 6 clients supported

Read more ↓

Web Developer & Digital Marketing Specialist Trafic Factory (2020 - 2021)

💠 Providing consulting and tailor-made solutions in SEO, SEA, CRO, analytics, redesign and website creation. I developed strong expertise in online marketing and worked both independently and as part of a team to create custom strategies and deliver tangible results.

✔️ In-depth analysis of client needs and goals to build effective and tailored digital marketing strategies.
✔️ Implementation of organic SEO and paid search campaigns to improve online visibility and generate qualified traffic.
✔️ Design and optimization of websites for better user experience and higher conversion rates — CRO.
✔️ Use of web analytics tools to track and evaluate campaign performance and provide detailed reports to clients.
✔️ Close collaboration with technical teams for the redesign and creation of high-performing and visually appealing websites.
✔️ Ongoing support and regular maintenance to ensure proper operation and security of digital platforms.

⚙️ Google Ads, Facebook Ads, YouTube, Google Search Console, Google My Business, Google Data Studio, Google UA, GA4, GTM, Google Sheets, GMC, SEMRush, XENU, Ranks, Photoshop, Figma, HTML, CSS, JS, PHP, jQuery, WP, Shopify, Prestashop, Sendinblue

⭐ €1M+ spent in Ads for e-commerce businesses
⭐ €5M+ revenue generated by our clients’ websites, including €3M+ from Ads
⭐ +10% increase in on-site conversion rate for our biggest client

Read more ↓

2017 - 2026 Education & certifications

AI-Powered Shopping Ads Certification April 2024

💠 Certification issued by Google recognizing expertise in creating and managing AI-powered shopping ads. This certification is part of the Google Ads program and validates the ability to use advanced Google Ads features to optimize shopping advertising campaigns.

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JavaScript Algorithms and Data Structures November 2023

💠 The freeCodeCamp JavaScript Algorithms and Data Structures certificate validates skills in algorithms and data structures using JavaScript. To obtain this certification, a series of challenges and practical projects must be completed.

This certificate demonstrates the understanding and ability to solve common algorithmic problems, as well as work with data structures such as arrays, objects, linked lists, trees and more.

Read more ↓

Google Analytics 4 Certification September 2022

💠 The GA4 certification is a recognition awarded by Google to certify an individual’s skills in using Google Analytics 4.

It can be obtained by passing an official exam offered by Google, covering various aspects of GA4, including setup, event tracking, data analysis and more.

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Google Ads Search Certification May 2020

💠 Certifies skills in creating, managing and optimizing effective advertising campaigns on the Google Ads search network. Mastery of the fundamentals: keyword selection, ad writing, campaign structuring, bid management, use of extensions, performance tracking and optimization to achieve marketing goals.

Read more ↓

Bachelor’s Degree in Web Marketing & UX Hetic, la Grande École du Web (2018 - 2021)

💠 Training in the different levers of digital communication.

✔️ SEO:
- Semantic, technical and backlink audits
- Appropriate recommendations
⚙️ Excel, Google Search Console, Semrush

✔️ SEA:
- Definition of conversion goals
- Campaign setup
⚙️ Google Analytics, Google Ads

✔️ Web development:
- Creation of a portfolio
- Database interactions
⚙️ HTML, CSS, JS, WordPress, SQL

✔️ Data Analytics:
- Appropriate tracking plan
- Creation of dashboards and data visualization
⚙️ Google Analytics, Google Tag Manager, Google Data Studio

✔️ UI/UX design:
- Design Thinking
- Persona identification
- User journey study
- Low-fidelity application prototyping
⚙️ Figma, Adobe XD

✔️ Social media strategy:
- P.L.E.A.S.E & T.O.M.S.T.E.R strategic processes
- Creation of an actionable editorial calendar
⚙️ Photoshop, Excel, Premiere Pro

Read more ↓

BTS Negotiation and Customer Relations CFA Stephenson (2017 - 2018)

💠 Training to become a sales representative or manager. Teaching how to manage customer relationships globally and digitally, from prospecting to loyalty, in order to contribute to revenue growth while respecting the company’s commercial policy.

✔️ Customer relations:
Understanding customer expectations, handling complaints, solving problems and measuring customer satisfaction.

✔️ Negotiation & sales:
Conducting sales interviews, arguing persuasively, closing contracts and responding effectively to customer objections.

✔️ Communication:
Verbal and non-verbal communication, active listening, reformulation and conflict management.

✔️ Management:
Task distribution, organization management, coordination of activities, staff motivation and management of individual and collective performance.

Read more ↓

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