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# Full Stack Developer

- **Company:** Merlin Digital Partner
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Admin Tools, Cross-Origin Resource Sharing (Ajax Programming), PostgreSQL, OAuth, JSON Web Token, Software Engineering, Systems Architecture, TypeScript, ReactJS, Backend, Material UI, Front End Software Development, NestJS, Microservices
- **Published:** August 12, 2026
- **Apply:** https://es.trabajo.org/oferta-4021-beb0f269ab93402c8314ad8d0d288c8d

## About the Role

strong plus. - Prior background in E-commerce (checkouts, payments, order management) is highly valued. Tech Stack: - Backend: Nest, TypeScript, MedusaJS (Self-hosted). - Frontend: React, Material UI, Chakra UI (+ Panda), TanStack. - Infrastructure: PostgreSQL, Microservices. What we offer: - Collaborative work environment and positive culture. - Free gym and classes. - Benefits and discounts in the company's products. - International and diverse teams. - 27 days off per year. - Flexibility in starting and ending your shift.

## Description

optimize payment providers like Stripe, Klarna, and Alma. - Internal tooling: Build custom internal CRM and "Offers" management tools from scratch using React, Material UI, and React Query. - Frontend evolution: Support and improve multiple frontends for treatment sales and our custom checkout flow. - System architecture: Work within a microservices environment, ensuring seamless communication between our ecommerce engine and internal systems. - Admin tools: Customize and extend internal admin panels to meet the specific needs of our growth and operations teams. What we need: - At least 5 years of experience in software development. - Minimum of 2 years of experience with NestJS (mandatory). - Strong proficiency in TypeScript across the entire stack. - Proven experience with React. - Solid understanding of PostgreSQL and microservices architecture. - Familiarity with security principles (CORS, OAuth, JWT). - Experience with MedusaJS or other headless ecommerce frameworks is a


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