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Jean Sébastien D.JS

Jean Sébastien D.

Email & Retention Marketing | E-commerce | Klaviyo

€300/day
22 projects
Aix-en-Provence, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Jean Sébastien

Here's a reality few brands want to admit:

😱 Most e-commerce brands lose 70-80% of their customers before the 2nd purchase.

Why?
⚠️ They let the most critical 30 days after the first order pass by - doing nothing.

💎 Your customer will repurchase - the only question is: from you or a competitor?

This is what I call The 30-Day Gap.
And that's exactly where I come in.

👋 I'm Jean-Sébastien
🎯 Email & Retention Marketer for E-Commerce brands
⚡️ 30+ brands supported · 5 years of experience

I build the complete ecosystem that brings your customers back automatically - automation flows, email campaigns, SMS/WhatsApp, loyalty programs - managed on Klaviyo.

Messages written in your brand's voice, not generic templates your customers have already seen elsewhere.

I mainly work with health & wellness brands (supplements, skincare, hygiene, consumables).

📩 Send me a message, let's connect for 30 minutes.
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • CBDOO
    Email & Retention Marketing Consultant
    E-COMMERCE
    January 2026 - Today (5 months)
    Aix-en-Provence, France
    CBDOO is an e-commerce store specializing in CBD products (flowers, oils, resins, derivatives, and wellness). I support the brand with its Email & Retention Marketing strategy: setting up and optimizing automation flows on Klaviyo, producing regular email campaigns, and managing segmentation. In a sector with strong regulatory constraints on communication, I adapt content to maximize engagement and repeat purchases – with a human editorial approach, far from generic promotional emails.
    Email marketing E-commerce SMS marketing Copywriting Emailing
  • Di CRM
    Email & Retention Marketing Consultant
    E-COMMERCE
    November 2025 - Today (7 months)
    Aix-en-Provence, France
    Since November 2025, I have been collaborating with the Di CRM agency as an Email & Retention Marketing consultant.

    I work directly on client accounts to audit, structure, and optimize their retention strategy on Klaviyo.

    My responsibilities include creating custom automation flows, producing and sending email and SMS campaigns, as well as performance analysis and monthly reporting.

    Each intervention aims for a concrete objective: increasing repurchase rates, improving customer lifetime value, and generating measurable recurring revenue.

    I work in close collaboration with the agency's teams to ensure a coherent strategy aligned with each brand's objectives.
    Klaviyo CRM Email marketing WhatsApp Loyalty
  • LASÈCHE
    Email & Retention Marketing Consultant
    EDUCATION AND E-LEARNING
    April 2025 - June 2025 (2 months)
    Aix-en-Provence, France
    2-month mission with LaSèche, a fitness and dietary rebalancing program with a community of over 53,000 members. I structured and deployed the email ecosystem on Klaviyo: setting up priority automation flows, producing and sending campaigns, segmenting the database, and monitoring performance. The main challenge was to maintain community engagement between challenges and maximize re-enrollments. A short but intense mission, with a brand that has a highly engaged audience and sales cycles dictated by monthly challenges.
    Klaviyo Email marketing Emailing Loyalty CRM

Reviews

5.0

Out of 17 ratings

L

Lasèche

LASÈCHE

Reviewed on 4/2/2025

A pleasure to work with Jean Sébastien! Ultra available, work completed on time and with great quality. I will undoubtedly continue to work with him after this first mission. Thank you.
E

Eline

LBD Collections - La Box Déco

Reviewed on 11/9/2022

Jean Sébastien is very invested, willing, and proactive, and remains very available and responsive.

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Education

  • Copywriting, Email Marketing & Retention
    Online Courses / Continuing Education
    Je me forme continuellement auprès des meilleurs praticiens francophones et anglophones du copywriting, de l'email marketing et de la rétention.

Skill set

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