Founding Product Manager

Permanent & full time contract

+5 years at either start up or tech company

Location: Paris HQ

Hey you,

Today, JUST offers a plug-and-play checkout experience that combines a high-performance, fast checkout with marketing triggers, enabling merchants to increase revenues and margins by an average of 10-15%.

With over 500 merchants onboarded in France and more than 1 million users, we’re now extending operations to the UK to drive innovation that will impact millions of consumers and brands worldwide.

Yes, we’re on a mission to reshape the entire customer journey and make shopping simple, smart, and social.

Our ambition is to serve a new generation of consumers for the next several decades, as PayPal did 30 years ago. But our vision goes beyond checkout: we draw inspiration from social commerce innovations in China.

We believe the future of shopping lies in seamless experiences that merge simplicity, personalization, and social interaction. This will empower consumers to make purchases effortlessly, track orders, receive fast refunds, enjoy personalized shopping experiences, and even engage in real-time shopping with friends.

"Becoming the new standard of shopping for the next decades" isn’t just a tagline—it’s our commitment to the future.

Join us on our mission to make shopping simple, smart, and social.

Here’s our landing page… take a look : getjust.eu

Can you do it?

At JUST, our mission is to change the way e-commerce operates by delivering a seamless checkout experience that rivals the best in the industry. As Founding Product Manager, you’ll play a key role in driving this transformation by shaping and executing our product vision, aligning cross-functional teams around a shared roadmap, and delivering innovative solutions that delight both merchants and shoppers.

Join us as a Founding Product Manager and be at the forefront of reshaping online shopping for merchants and consumers alike.

What is the focus of the role?

• Establish a strong product culture: Champion a culture of curiosity, speed, experimentation, and continuous learning—embedding product thinking across the entire organization.
• Design seamless and intuitive user experiences: wireframes, mockups, interactive prototypes.
• Ideate and iterate on new features/products aligned with user needs and business goals.
• Collaborate with the tech team to turn insights and mockups into concrete, prioritized solutions.
• Measure design impact through product KPIs and continuously adjust using a data-driven approach.
• Organize and facilitate Product Discovery: co-creation workshops, user testing, rapid iteration cycles.
• Ensure visual and functional consistency across the product (design system, guidelines, cross-platform experience).
• Act as a product and design culture ambassador by sharing best practices and promoting a user-centered approach.

The products you’ll be working on:

• Creating a world-class checkout experience

  Continuously improving a fast, simple, and reliable checkout flow that already powers transactions for our merchants — with a focus on removing remaining friction points and optimizing for conversion and shopper satisfaction.

• Evolving the merchant dashboard

  Enhancing the existing dashboard used by merchants to manage their relationship with JUST — making it more intuitive, insightful, and actionable to better support onboarding, configuration, and performance monitoring.

• Scaling technical integrations

  Strengthening and expanding our current integration infrastructure to support a rapidly growing merchant base — solving new technical challenges around scalability, flexibility, and ease of implementation.

You and your approach to the role?

• Strategic thinking

  Ability to see the big picture, set a clear direction, and align the product roadmap with business goals and market opportunities.

• Empathy

  Deep understanding of both merchant and consumer needs, as well as the ability to listen, communicate, and lead with emotional intelligence across teams.

• Strong communication

  Clear and persuasive in both written and verbal communication — able to synthesize complex ideas and rally diverse stakeholders around a shared vision.

• Collaboration & influence

  Skilled at working cross-functionally and building trust with engineering, design, sales, and leadership — even without direct authority.

• Adaptability

  Comfortable navigating ambiguity, shifting priorities, and fast-paced change — staying focused while adjusting course when needed.

• Curiosity & growth mindset

  Always eager to learn, explore new ideas, and iterate — fostering a culture of experimentation and continuous improvement.

Preferred experience

• Prior experienc