Full Stack Product Engineer

Salary Competitive

The Company

Gray Matter is a Startup Studio dedicated to creating world-class SaaS companies. Our goal is to enable people and organizations to reach great heights through outstanding software products.

The Opportunity

We're looking for a Full Stack Product Engineer with expertise in Rails, ready to build on one of our startups.

This role is for someone who loves the process of creation from the ground up, offering a balance between hands-on development, and a strong focus on user experience and design.

If making a tangible impact through direct contribution, leadership, and enhancing user experiences sounds like your kind of challenge, we're interested in talking to you.

The Role

  • Building Products: Lead the technical development from initial concept to live deployment, ensuring the final product aligns with our vision and offers an outstanding user experience.

  • Technical Decision-Making: Choose the right technologies and frameworks, including Rails and Tailwind (or similar), to build reliable and maintainable software solutions with a strong focus on design.

  • Working with the CEO & Founder: Offer your insights on product strategy and development, helping to guide the direction of startups.


  • Experience: Proven Rails development expertise, covering both front-end and back-end, with at least 5 years of experience. Ideal candidates have contributed to early-stage and scaling B2B SaaS projects, prioritizing user experience and design.

  • Strategic Input: Ability to contribute to strategic discussions, particularly in how they relate to product development and design.

  • Flexibility: Comfort with the fast pace and changing needs of a startup environment.

What's in It for You

  • Impact: Directly influence our product development and company direction, seeing the results of your work in action, with a significant emphasis on improving user experience.

  • Collaboration: Close work with the CEO, where your expertise will influence key decisions.

  • Growth: A role that grows with you, offering the chance to build something from the ground up.

  • Flexibility: Remote or from our Barcelona office.

  • Bonus if you have been working with Langchain or OpenAI Agents/Tooling

For more information or questions please contact us at jobs@graymatter.ai

Perks and benefits

This job comes with several perks and benefits

Near public transit
Near public transit

Work life balance
Work life balance

Free office snacks
Free office snacks

Social gatherings
Social gatherings

Flexible working hours
Flexible working hours

Skill development
Skill development

See all 9 benefits

Working at
Gray Matter

We are a European born Startup Studio, focusing on AI-enhanced B2B software solutions for Europe and Latin America. We believe that together, we can build something truly remarkable - a company and community that reflects the passion and dedication of every member. So if you're looking for a place to connect, collaborate, and grow with like-minded individuals, this is the place.

Read more about Gray Matter

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