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# Full Stack Developer

- **Company:** Merlin Digital Partner
- **Location:** Barcelona, Spain (Remote available)
- **Salary:** €50,000.0 - €55,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, User Authentication, Continuous Integration, Data Architecture, Extract Transform Load (ETL), Data Security, Relational Databases, Distributed Systems, Identity and Access Management, PostgreSQL, Node.Js, OAuth, Software Architecture, Role-Based Access Control, Blockchain, Next.js, Data Streaming, Systems Integration, Cloud Platform System, ReactJS, Caching, Backend, Git, Containerization, Data Analytics, Ethereum, Graphql, Data Management, Front End Software Development, Api Design, NestJS, Webhooks, Docker, Microservices
- **Published:** July 10, 2026
- **Apply:** https://es.trabajo.org/oferta-5354-fc0b80d410adedd661689b48c2419f46

## About the Role

and quality across systems. Quality & Deployment - Apply development best practices (Testing, CI/CD). - Containerization and deployment (Docker, Cloud environments). - Document APIs and architectural decisions. Tech Stack - Node.js - Supabase - PostgreSQL - React / Next.js - Docker - REST / GraphQL - CI/CD What we are looking for - +3-5 years of experience as a Full Stack Developer. - Expertise in Node.js (Express / NestJS). - Proficiency in React / Next.js or similar frameworks. - Hands-on experience with PostgreSQL / Supabase . - Solid knowledge of relational data modeling. - Proven experience in API design. - Familiarity with Git, cloud environments, and CI/CD workflows. Nice to have - Blockchain Experience: Familiarity with Ethereum, smart contracts, and digital identity (SSI). - Architectural Knowledge: Experience with distributed architectures or microservices. - Sensitive Data Management: Background in handling highly secure
data (Healthtech, Fintech, or Identity Management). - Headless CMS/Platforms: Experience integrating with headless solutions like Directus or similar tools. - AI & Analytics: Previous experience in projects involving AI components or data analytics. Benefits - Location: Barcelona - Salary Range: €50,000 - €55,000 - We are open to considering candidates outside this range (both Junior and Senior profiles) depending on technical expertise and the value brought to the role, as the team is actively expanding. - Remote-Friendly: You will be able to work remotely, with occasional in-person meetings in Barcelona. - Core Team Impact & Career Plan: You will join the core of an innovative project in its high-growth phase. This offers the opportunity to build your own career J-18808-Ljbffr

## Description

management, system integration, and a robust user experience. This role combines advanced backend capabilities with frontend development and a strong focus on data architecture. Key Responsibilities Architecture & Backend - Design and implement scalable APIs (REST / GraphQL) using Node.js. - Define and evolve data models in Supabase (PostgreSQL). - Model relational databases (normalization, integrity, optimization). - Build modular, maintainable backend services. - Manage authentication and access control (JWT, RBAC). Frontend & Experience - Develop high-performance interfaces using React / Next.js or similar stacks. - Integrate APIs ensuring consistency and efficiency in data consumption. - Define frontend patterns (state management, caching, SSR). - Collaborate on product-oriented UX/UI decisions. Integration & Data - Integrate external systems (APIs, OAuth, IoT, third-party services). - Design data flows (ETL, webhooks, synchronization). - Guarantee data consistency


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