Frontend Engineer Intern

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?

As a Frontend Engineer Intern, you will collaborate with a cross-functional team to develop and maintain our platform, delivering value to customers and suppliers. You’ll gain hands-on experience building new features, solving technical challenges, and contributing to the performance of a global e-commerce platform.

YOUR MISSION (IF YOU ACCEPT IT): 🥇

• Write clean, maintainable, and efficient code that fits with the context, the needs and the existing codebase.

• Participate in code reviews and contribute to the improvement of our codebase.

• Work closely with UX/UI designers to ensure the technical feasibility of designs.

• Communicate effectively with team members to understand requirements and provide technical insights.

• Take initiative to learn new skills and tools that can enhance your contributions to the team.

• We anticipate that you will be a dedicated team player, eager to engage in pair-programming sessions, while also being an independent and proactive team member who persists when encountering new challenges.

• Quality assurance support: Assist in quality assurance tasks to ensure our platform meets the highest standards of performance and reliability.

• Collaborative deployment: Work alongside a senior developer to push code to production, gaining hands-on experience with our deployment processes.

• Admin tools: Contribute to the development and enhancement of internal admin tools used for creating insurance offers and mobile plans, supporting our staff in delivering exceptional services.

• End-to-end testing: Develop and maintain end-to-end tests to ensure the seamless functionality and integration of new features across our platform.

YOU ARE IN THE RIGHT PLACE IF: ⭐

• You are a master’s degree student studying computer science, priority to Web Development, specifically Frontend engineering

• You have knowledge of JavaScript, HTML, CSS, and ideally frameworks like Vue.js or React.

• You have basic programming experience (github, personal, student projects, other internships).

• You have knowledge of developing new features using Nuxt/Vue.js, TypeScript, and Design Systems.

• You have the ability to learn new software and technologies quickly, being curious about the coding environment you’ll evolve in.

• You are detail-oriented and have the desire and ability to work in a team in an international environment.

• You are fluent in English - Spanish and/or French is a plus.

• You are looking for a 6 month, full-time role (30-35h/week), internship based in Barcelona from January/February 2026 - June/July 2026

• Your school can provide an internship agreement & you are authorized to work in Spain (EU Nationality or in possession of valid student visa/work permit).

RECRUITMENT PROCESS: 📅

• Interview with the Campus Recruitment Team member (30min).

• Technical fit interview (live-coding/Q&A) with the tutor (45-60min).

• Team fit interview with two engineers from the team (30min)