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.
- Adaptable 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