Hi, we’re Back Market.

We’re here to help make tech reliable, affordable, and better than new. We're a global marketplace for refurbished devices, helping lower our collective environmental impact by providing trustworthy, affordable tech with 92% less carbon emissions than new.

Yep, you read that right. Turns out refurbished tech is way better for the planet than new. In fact, With every device purchased on Back Market, our positive impact on the planet grows. From our Customer Care representatives to our software engineer, every individual at Back Market cuts the planet — and consumers — a break. Our mission is simple: to do more with what we already have.

Are you ready to join us?

JOB DESCRIPTION:

Back Market would be nothing without our valued Sellers, who provide our customers with all the latest refurbished products. The more we grow, the more new sellers we welcome, and that's where the Seller Lifecycle team, as part of the Sellers team, comes in. By collaborating with various departments within Back Market (Operations, Support, Quality, Product, Finance, Services, etc.), we meet the needs of our sellers in the most efficient way possible, while monitoring and improving their overall performance on the platform to take the refurbished industry to the next level.

As a Seller Mass-Account Manager Intern within the Seller Lifecycle team, you will work closely with our refurbishers and support them to offer customers the best products in terms of quality and price. You will focus on portfolio management with hundreds of accounts, data-driven decision making, seller consulting, and cross-functional business initiatives that directly impact our marketplace growth.

YOUR MISSION (IF YOU ACCEPT IT): 🥇

• Manage a large portfolio of sellers (refurbishers) at scale and drive the global sales and quality performance of the portfolio through strategic account management

• Transform raw data into business gold - analyze complex databases, identify KPI trends, and provide actionable insights that move the needle

• Lead cross-functional strategic projects to develop and implement tailored solutions for our vendor ecosystem

• Drive Back Market's explosive growth by contributing to high-stakes transversal projects (Black Friday campaigns, market diversification, new business initiatives, etc.)

YOU ARE IN THE RIGHT PLACE IF: ⭐

• Looking for a 6-month full-time internship that offers real responsibility and strategic impact

• French and English fluency (C1 minimum) - because you'll be managing international seller relationships (bonus points for additional languages!)

• Business-savvy with analytical superpowers - ideally with previous commercial experience, especially in e-commerce

• Excel master - pivot tables, data manipulation, and turning numbers into stories are your jam

• Salesforce experience is a huge plus - but we'll train the right candidate

• Highly organized with exceptional communication skills and a "get stuff done" mentality

• Natural collaborator who thrives in fast-paced, cross-functional environments

ABOUT THE INTERNSHIP: ℹ️

• Starting date: January 2026

• Duration: 6 months (until June 2026)

• Full-time role (35H/week)

• Location: Paris, France

• Contract: You must have an internship agreement from your current French school

RECRUITMENT PROCESS: 📅

• Video-call HR interview with the Talent Acquisition Specialist (30min)

• Business case study (2 days at home)

• Live Business Case Study and Skills Fit Interview with your future manager (45min)

• Cultural Fit Interview with another member of the team (30min)

WHY SHOULD YOU JOIN US ? ✌️

At Back Market, we’re committed to hiring and supporting diverse teams of people from all backgrounds, experiences, and perspectives — it’s one of the reasons we’re such a high-scoring certified B Corp company (93.2).No matter your role and seniority level, you’ll enjoy impact-driven work with hands-on career development in an innovative, driven, and fast-paced environment — with benefits to match, like:
- A mission driven work environment where your day to day makes an impact on the planet. Seriously.
- Hybrid work environment, with 2 remote days a week and 1 remote work week per quarter, plus 3 flex days.
- Employee Resource Groups, including mentorship programs, comprehensive accessibility policies, and cultural competency training. At Back Market, we strive to create a workplace that embodies the world we’re trying to change. We’ve embedded our diversity, equity, and inclusion principles into our DNA — from dedicated staff to employee resource groups to our company values.
We know that the perfect background for a role doesn’t mean the perfect fit — we encourage you to apply for a role even if you think you may not have all the qualifications. If reasonable accommodations are needed for the interview process, please do not hesitate to discuss this with the Talent Acquisition Team.

Ready to transform the refurbished tech industry while building your business career? Let's talk!