Growth Intern (AI)

Location: In-person at the Barcelona office, Spain, with occasional travel to marketplaces depending on the role and scope.

Company

Seventh Wave is part of Adevinta, an online classifieds group operating marketplaces including hirify.global, mobile.de, leboncoin, Marktplaats, Subito and Kijiji, with a focus on AI deployment and marketplace growth at scale.

What you will do

• Own a defined commercial assignment, such as customer research for a new business model or a campaign test.
• Research customers, competitors and market trends and turn findings into actionable growth recommendations.
• Analyse user, product and commercial data to answer business questions with growth managers and analysts.
• Prepare propositions, campaign materials and tests, support launches, and recommend next steps from the results.
• Test AI tools in research, analysis and campaign preparation.
• Document successful methods and results in reusable templates and playbooks for marketplace teams.

Requirements

• Break unfamiliar questions into manageable parts, explain reasoning clearly, ask useful questions, and revise views when learning new information.
• Set demanding goals, take initiative, follow through on commitments, raise problems early, and act on feedback.
• Turn questions into clear analyses, explain assumptions, assess whether data supports conclusions, and work comfortably with spreadsheets.
• Learn new topics quickly and experiment with AI and other tools to improve ways of working.
• Communicate fluently in English, ask for help when needed, keep colleagues informed, welcome feedback, and contribute to team success.
• Show strong results and initiative through studies, internships, projects, or something built independently.

Nice to have

• No additional optional qualifications specified.

Culture & Benefits

• Year-round applications are accepted for shorter internships and gap-year internships.
• Hands-on commercial experience with regular feedback and guidance from experienced growth managers and marketplace teams.
• Meaningful responsibility from the start within a small, international team with high standards.
• Opportunities to learn how marketplace businesses grow and take on additional responsibility over time.
• Occasional travel to marketplaces may be required depending on role and scope.

Hiring process

• Submit a one-page CV and a one-page cover letter explaining motivation for joining Seventh Wave, expected contribution, preferred start date, and internship duration.
• Applications are personally reviewed, with contact expected within two weeks.
• Shortlisted candidates complete two interviews combining personal-fit discussions and practical case studies; preparation requirements are shared before the interviews.