Full Stack Engineer

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

Descripción de la vacante

A leading development agency is seeking a Senior Full-Stack Engineer to join their remote team. You will build scalable web applications using Node.js and React, collaborate with clients, and contribute to architectural decisions in a flexible work environment. Requires fluency in English and Spanish, and a minimum of 5 years in software development.

Servicios

Competitive salary

Work from home or from a coworking space

Flexible working hours

Amazing coworkers

Modern tech stack

Company activities

Formación

• 5+ years of production experience building Node.js and React applications.
• Production experience with Next.js and Server Components is required.
• Strong writing and documentation skills.

Responsabilidades

• Build and maintain modern web applications.
• Collaborate closely with clients in a remote-first environment.
• Contribute to architecture decisions and maintain clean codebases.

Conocimientos

Excellent communication with clients and teammates

Strong self-management skills for remote work

High attention to detail

Proactive and able to work independently

Fluent in written and spoken Spanish

Fluent in written and spoken English

Herramientas

Node.js

React

Next.js

JavaScript

TypeScript

SQL

Docker

Jest

Cypress

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 . 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 . We build things the right way. We believe in doing deep, focused work — not meetings all day.

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

WHAT YOU'LL DO

• 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.
• Contribute to architecture decisions and ensure clean, maintainable codebases.
• Use AI-assisted coding tools to improve development speed and quality.
• Help us refine our internal tools, workflows, and development culture.

GENERAL SKILLS

• Excellent communication with clients and teammates.
• Strong self-management skills for remote work.
• High attention to detail.
• Positive attitude towards new challenges and a fast learner.
• 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.

TECH SKILLS

• 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.

BENEFITS

• Competitive salary.
• Work from home or from a coworking space.
• Flexible working hours.
• Amazing coworkers.
• Modern tech stack and methodologies.
• Transparency and quality-oriented culture.
• Company activities.

WHY MARSBASED

We’re a boutique agency, not a factory. We work with clients who respect our time, process, and craftsmanship. 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 ❤️