- Salary
- €60K–€90KEUR per year
- Hiring from
- Europe
- Work type
- Remote
- Posted
- Sep 24, 2026
Senior Software Engineer (Backend – Ruby on Rails)
Remote | Full-Time / Long-Term Contract(B2B) | 60KEuros–90KEuros
About the Opportunity
Our client is scaling at an extraordinary pace and is building the next generation of AI-powered consumer technology. To support an aggressive product roadmap and massive user growth, they are adding experienced Senior Backend Engineers to their engineering team.
This is a highly impactful role where you’ll contribute directly to system design, product direction, and large-scale platform performance—all within a fast-moving, innovation-driven environment.
You’ll collaborate closely with product leadership, engineering, and executive stakeholders to bring bold ideas to life.
What You’ll Be Doing
Partner with Product Managers to translate product requirements into scalable technical solutions
Design backend architectures, integrations, and data flows
Own features end-to-end: development, testing, deployment, and maintenance
Review code, participate in pull requests, and raise engineering quality standards
Contribute to technical strategy, experimentation, and performance optimization
Work closely with a distributed team including platform engineers, SREs, and data specialists
While full-stack experience is welcomed, this role is heavily weighted toward deep Ruby on Rails backend expertise.
What We’re Looking For
Core Requirements
5+ years of professional software engineering experience
Recent, hands-on experience developing with Ruby on Rails
Experience building and maintaining high-traffic, production-grade applications
Background working in startups, scale-ups, or other rapid-growth environments
Strong English communication skills (written & spoken)
High ownership mentality—you take responsibility for outcomes, not just tasks
Ability to balance speed with thoughtful engineering craftsmanship
Strong product mindset with a focus on exceptional user experience
Comfortable working on platforms that involve uncensored model-based content
Nice-to-Have Experience
Exposure to data engineering, machine learning, or generative AI systems
Experience collaborating across globally distributed teams
Why Join This Company?
Explosive growth: Tens of millions of users today with a path to hundreds of millions
Industry leadership: A history of launching category-defining AI products
Mission-driven tech: Building culturally relevant, real-world AI applications
Veteran leadership: Founders and executives with multiple successful exits and public offerings
Remote-first excellence: 100% distributed team of elite engineers from top-tier companies
Ethics-first AI: Powered by a proprietary moderation and safety framework at scale