Full-Stack Development Internship - Platform Overhaul

Description

Summary: Join Hello Pomelo as a development intern for a technical platform overhaul, focused on migrating to modern JavaScript/TypeScript technologies. Highlights: 1. Participate in the complete overhaul of an existing platform 2. Work with modern JavaScript/TypeScript technologies 3. Mentorship by a tech lead and guidance from a product owner **About Us** ------------ At Hello Pomelo, we do more than just software development: we are **the trusted digital transformation partner for French mid-sized enterprises (ETIs)**. Our mission: **to strengthen business-critical tools** that drive our clients’ businesses by delivering tailored, reliable solutions across their entire application landscape. To achieve this, we operate across **four complementary pillars**: * **Custom web and mobile applications**, designed to meet each client’s specific needs and ensure optimal user experiences; * **DevOps**, ensuring system stability, scalability, and efficiency while accelerating delivery cycles; * **E-commerce**, supporting the growth of retail and online service providers with high-performance, flexible platforms; * **ERP and PIM**, structuring and optimizing business processes, centralizing information, and facilitating decision-making. Every day, our teams bring **Hello Pomelo’s energy and technical expertise** to serve our clients — ensuring that their technical production capacity is never a barrier to innovation, but rather a concrete driver of growth and added value. We are proud to be a **leading tech delivery partner** for French ETIs, supporting their long-term success. **Job Description** ----------------------- Barcelona \- 2 months We are seeking a development intern to participate in the complete overhaul of our platform. The goal is to migrate the current tech stack (Symfony / React / Next.js) to a modern full JavaScript/TypeScript stack, preserving all existing functionality. **Your Responsibilities** You will work on the platform’s technical migration while respecting the existing functional scope. No new features: the focus is on producing clean, maintainable, and well-structured code. The target stack will revolve around modern JavaScript technologies on both back-end and front-end, including concrete security topics: authentication, access control, and data protection. You will be mentored by a tech lead and guided by a product owner throughout the internship. **Practical Information** * Duration: 2 months * Location: Barcelona (on-site) * Compensation according to profile **Required Profile** -------------------- **Required Profile** * Strong proficiency in full-stack JavaScript/TypeScript development * Familiarity with Symfony or React / Next.js is a plus for understanding the current codebase * Experience with or curiosity about frameworks such as Nest.js or authentication tools like Keycloak is a plus * Sensitivity to security best practices * Comfortable with Git and standard development practices * Autonomous, rigorous, and capable of reading and understanding existing code **Additional Information** -------------------------------- * Contract type: **Internship** (2 to 2 months) * Start date: **01 July 2026** * Location: **Barcelona** * **Occasional remote work permitted**