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 invol

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