Full Stack Developer Hybrid / Remote Working

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 remote-first team. The ideal candidate should have extensive experience in Node.js and React, with strong skills in JavaScript and TypeScript. You will collaborate with a senior team focusing on building scalable applications and utilizing AI-assisted tools. The role offers flexible working hours and values transparency and quality in the development process.

Servicios

Flexible working hours

Remote work options

Quality-oriented culture

Formación

• 5+ years of production experience building Node.js and React applications.
• Production experience with Next.js, the App Router, and Server Components.
• Strong knowledge in relational databases and SQL.

Responsabilidades

• Build and maintain modern, scalable web applications.
• Collaborate closely with clients and teammates.
• Use AI-assisted coding tools to improve development speed and quality.

Conocimientos

Node.js

React

JavaScript

TypeScript

SQL

Docker

Next.js

AI-assisted coding tools

Testing frameworks (Jest, Cypress)

Self-management

Fluent in Spanish

Fluent in English

Descripción del empleo

MarsBased is a

development agency

from Barcelona offering end‑to‑end web & mobile apps built with

Ruby on Rails

React

and

JavaScript

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

If you love elegant code, solving complex problems, and being part of a kind and experienced remote team, this might be your next orbit.

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

• 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.

Join us and help us build software that lasts — from Mars, or anywhere you call home ❤️