Full Stack Developer (Hybrid / Remote)

MarsBased; Madrid; A distancia; EUR 50.000 - 70.000; Jornada completa

Descripción de la vacante

A development agency is seeking a senior full-stack engineer to join their team. The role requires strong knowledge of Node.js and React, with a focus on building scalable web applications. The ideal candidate enjoys remote work, values quality, and has over 5 years of relevant experience. The company promotes a flexible working environment with a transparent and quality-oriented culture.

Servicios

Flexible working hours

Work from home or coworking space

Quality-oriented culture

Formación

• 5+ years of experience building Node.js and React applications.
• Experience with Next.js, App Router, Server Components.
• Solid understanding of relational databases and SQL.

Responsabilidades

• Build and maintain web applications using Node.js, React, and Next.js.
• Collaborate with clients and teammates in a remote-first environment.
• Use AI-assisted coding tools to improve speed and quality.

Conocimientos

Self-management skills

Fluency in Spanish

Fluency in English

Node.js knowledge

React knowledge

TypeScript knowledge

Experience with Docker

Herramientas

AI coding tools

Testing frameworks (Jest or Cypress)

Descripción del empleo

Overview

MarsBased is a development agency from Barcelona offering end‑to‑end web & mobile apps built with Ruby on Rails, React, and JavaScript. We believe in remote work, clean code, and delivering quality over quantity. We’re looking for a senior full-stack engineer to join our Martian team, with strong knowledge of Node.js and React. You’ll be joining a small, senior, and highly‑collaborative team that values autonomy, quality, and transparency.

From Mars, or anywhere you call home ❤️

Responsibilities

• Build and maintain modern, scalable web applications using Node.js, React, and Next.js.
• Collaborate closely with clients and teammates in a friendly, remote-first environment.
• Use AI-assisted coding tools to improve development speed and quality.

General Skills & Qualifications

• Strong self-management skills for remote work.
• Proactive and able to work independently on self-managed projects.
• Experience using AI agents or AI code editors to assist in coding tasks.
• Fluent in written and spoken Spanish.
• Fluent in written and spoken English.
• 5+ years of production experience building Node.js and React applications.
• Production experience with Next.js, the App Router, and Server Components is required.
• Experience with React Router or Remix (nice to have).
• Strong JavaScript and TypeScript knowledge, both frontend and backend.
• Solid understanding of relational databases and SQL.
• Production experience deploying and maintaining Node.js applications.
• Familiar with Docker and containers in both development and production environments.
• Experience with testing frameworks such as Jest or Cypress.
• Ability to build scalable and maintainable software over time.
• Strong writing and documentation skills; we value clarity in your code and solutions.

Work from home or from a coworking space. Flexible working hours. Transparency and quality-oriented culture.

We’re a boutique agency, not a factory. You’ll be part of a senior team where your voice matters and your work has a real impact.