Senior Ruby Developer

• Location: Fully remote (EMEA)
• Employment Type: Permanent or B2B Contract
• Base (p/a): €100k + benefits (listed below)
• Start Date: Immediate/negotiable 

Full-time | Remote (Europe-based)

Are you a seasoned backend engineer with deep Ruby-on-Rails expertise? Were looking for a Senior Ruby-on-Rails Engineer to join a fast-growing, ambitious AI-centric tech team building world-class products used by millions globally. This is a hands-on engineering role with plenty of technical ownership, collaboration across product and engineering functions, and an opportunity to shape the backend architecture of core products.

What You'll Be Doing

• Collaborate with product and engineering peers to refine project specs, break down tasks, and deliver high-quality technical solutions.
• Build, test, deploy, and maintain core backend systems using Ruby-on-Rails.
• Write clean, efficient, and scalable code that supports a high-traffic product.
• Participate in code reviews, mentoring, and knowledge sharing within the engineering team.
• Contribute ideas and technical leadership on backend architecture and best practices.

What Were Looking For

• 5+ years of experience as a backend or full-stack engineer, with recent Ruby-on-Rails experience.
• Proven ability working in fast-paced, agile environments and delivering production-grade backend solutions.
• Strong understanding of backend engineering principles and web application architecture.
• Excellent communicator with strong English fluency.
• Ownership mindset — you care about the code you ship and the impact it has.

Bonus points:

• Interest or experience in AI, data science, or distributed teams.

What We Offer

Contract Flexibility
Prefer B2B, but open to other arrangements — what matters most is long-term ownership and real impact.

Work From Anywhere
Fully remote. Build world-class AI from wherever you do your best thinking.

Generous Time Off
4 weeks (20 working days) of paid time off per year — step back, reset, and come back sharp.

Annual Team Gathering
Once a year, we meet in person to align on vision, brainstorm big ideas, and celebrate what weve shipped.

Health & Wellbeing Support
Up to $200/year for wellbeing expenses plus unlimited 1:1 sessions with psychologists and lifestyle experts (also available for up to three family members).

Co-Working Budget
Prefer not to work from home every day? Use a co-working space up to twice per month (35 EUR / 40 USD per visit).

Learning & Experimentation Budget
Funds for courses, books, conferences, research, or anything that keeps you sharp in the fast-moving LLM space.

Equipment & Setup
Company laptop provided, plus up to $250 for monitors or home-office upgrades.

Premium AI Tooling
Full access to top-tier AI tools (LLM APIs, coding assistants, model hubs) so you can move fast and build better.

How to Apply

If youre excited to build backend systems with Ruby-on-Rails for high-impact products and thrive in a remote, autonomous environment, we want to hear from you.

SourceIn (sourcein.co) has been formally appointed by the client to provide recruitment and candidate pre-screening services for this role.