Ruby on Rails backend engineer

We are looking for a Ruby on Rails backend engineer to join our Martian team.

100% Remote

We’re looking for a Backend Engineer with solid experience in Ruby on Rails to join our
Martian crew.

At Mars Based, you’ll work with a small, senior, and highly collaborative team that values
autonomy, transparency, and craftsmanship. We care about doing things the right way,
with clean architectures, thoughtful design, and deep, focused work (not endless meetings).
If you love elegant code, solving real problems, and being part of a kind, experienced, and fully remote team, your next orbit might just be with us

• Build and maintain modern, scalable web applications using Ruby on Rails, including other technologies, frameworks, and tools.
• 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.
• Clear and professional written and verbal communication with internal teams and clients/stakeholders.
• Enthusiastic and positive approach to new challenges; ability to quickly assimilate new information and processes.
• Ability to work independently, demonstrate strong self-management skills in a remote environment, and take ownership of projects.
• Excellent attention to detail and commitment to high‑quality output.
• Proactive & able to work alone on projects managed by you.
• Fluency (written and spoken) in English and/or Spanish, with proficiency in both being strongly preferred.

• Deep proficiency and professional experience with Ruby on Rails (RoR) for developing robust, scalable backend applications.
• Strong command of relational databases, including SQL and practical experience with Postgre
  
  SQL or MySQL.
• Commitment to high‑quality code through unit, integration, and end‑to‑end testing (e.g., RSpec, Minitest).
• Proven ability to design and implement RESTful APIs.
• Comfortable working with Docker and Git.
• Experience with alternative backend languages such as Python (e.g., Django, Flask) and/or Node.js (e.g., Express) is a significant advantage.
• Proficiency in Type Script and modern JavaScript frameworks is highly desirable.
• React is the strongly preferred frontend skill.
• Ability to write self‑documented code. We expect you not only to solve problems but also to write code that is easy to understand.
• Ability to leverage AI coding assistants (e.g., Git Hub Copilot, Gemini Code Assist, or Cursor) to enhance productivity, accelerate boilerplate generation, improve code explanations, and aid in debugging and testing.

• Competitive Pay:
  Your contribution deserves to be valued.
• Work your way:
  We’re an office‑less company. Home office or coworking space. You choose what works best for you.
• Flexible hours:
  Set your own schedule and work when you’re at your best.
• Awesome Teammates:
  You’ll be surrounded by kind, smart, and fun people who love what they do.
• Modern Tools:
  We use up‑to‑date tech and innovative methods to make work smoother (and more enjoyable).
• Open & Honest Culture:
  We enforce transparency, quality, and teamwork.
• Team Fun:
  From casual catch‑ups to team events, we make sure there’s always time to laugh and connect. It’s not always about work.
• Check the full list of benefits and perks here !

• This position is only open to applicants residing in Europe who hold a valid work permit authorizing employment in the region.

If you are looking for a new challenge in your career, fill in this form and tell us why you are the perfect fit for Mars Based.