Senior Ruby Engineer

Fully Remote

B2B Contract

Salary up to €105K Annually Gross.

Our client is looking for a Senior Ruby Engineer to join a fast-growing, international technology company building a high-traffic AI-powered consumer product used by millions of users worldwide.

This is a fully remote, hands-on engineering role for someone who enjoys working at scale, taking ownership, and solving challenging backend problems in a fast-moving environment.

What you'll be doing

• Design, build, and maintain scalable backend systems using Ruby on Rails
• Work on high-traffic, production-grade applications serving millions of users
• Contribute to architectural decisions and scaling initiatives
• Identify and solve complex performance and reliability challenges
• Take ownership of features from conception through production
• Collaborate closely with Product, Design, QA, AI, and DevOps teams
• Work in a fast-paced environment where engineers have significant autonomy
• Use modern AI-powered development tools as part of your engineering workflow

What we're looking for

• 5+ years of backend engineering experience
• Strong professional experience with Ruby on Rails
• Experience building and operating high-traffic, scalable production systems
• Strong understanding of web fundamentals, backend architecture, and performance optimisation
• Experience with monolithic architectures and/or scaling challenges
• Proven ability to take ownership and make technical decisions independently
• Experience working in a startup or scale-up environment is highly desirable
• Comfortable collaborating within cross-functional engineering teams
• Strong communication skills in English
• Actively uses AI tools such as ChatGPT, GitHub Copilot, Cursor, Claude, or similar in development
• Comfortable working within CET ±3 hours

Benefits

• Fully remote - work from anywhere within the relevant European time zones
• B2B contract only
• Compensation of up to €105,000 per year
• High-impact work on a product operating at significant international scale
• A highly autonomous environment with real engineering ownership
• Fast-paced, collaborative international team
• Opportunity to work with modern AI technologies and development practices

⚠️ Important

This role involves working on a consumer product that includes adult-oriented/NSFW content. Candidates must be fully comfortable working professionally in this environment.

If you're a Senior Ruby Engineer who enjoys scale, ownership, autonomy, and fast-moving product environments, we'd love to hear from you.