Senior Software Engineer (Ruby on Rails) – Switzerland
Join a fast‑scaling AI‑driven product company operating at massive global scale, where engineering directly shapes how millions of users interact with next‑generation digital experiences. This role is ideal for a senior backend or full‑stack engineer who thrives in high‑velocity environments and enjoys building complex, user‑facing systems from the ground up. You will contribute to the design, development, and scaling of large‑scale Ruby on Rails applications powering a category‑defining AI platform. Working closely with product, engineering, and technical leadership teams, you will help define architecture, implement features, and ensure high performance and reliability. The environment encourages ownership, experimentation, and rapid iteration, giving engineers real influence over product direction. If you are passionate about building impactful software at scale and working on innovative AI products, this is a high‑growth opportunity.
Accountabilities
Collaborate with product managers to review technical specifications, define requirements, and translate them into scalable engineering solutions.
Design integration approaches, system breakdowns, and development estimates for new features and product initiatives.
Develop, test, and maintain backend and full‑stack features using Ruby on Rails and related technologies.
Participate in code reviews, pull requests, and software quality assurance processes to ensure robust and maintainable code.
Work with PostgreSQL, Redis, Hotwire (Turbo & Stimulus), and Tailwind CSS to build performant applications.
Contribute to system architecture decisions and support the scaling of high‑traffic, user‑facing platforms.
Collaborate with engineers, data scientists, and SRE teams to deliver reliable and efficient systems.
Experiment with new ideas and propose technical improvements to enhance product capabilities and user experience.
Ensure code quality, scalability, and performance standards are met across all development activities.
Actively participate in cross‑functional discussions to align engineering output with product vision and user needs.
Requirements
5+ years of experience as a backend or full‑stack software engineer in fast‑paced, scale‑up environments.
Proven experience building and maintaining large‑scale applications used by thousands or millions of users.
Strong expertise in Ruby on Rails and modern backend development practices.
Solid knowledge of PostgreSQL, Redis, and relational database design principles.
Experience with frontend tooling such as Hotwire (Turbo, Stimulus) and Tailwind CSS is a strong plus.
Strong communication skills with the ability to collaborate effectively in distributed, cross‑functional teams.
Ownership mindset with a strong sense of accountability and product responsibility.
Ability to balance software craftsmanship with fast‑paced delivery expectations.
User‑centric approach with attention to product quality and experience.
Interest or experience in AI, ML, or data‑driven systems is a plus.
Comfortable working in innovative environments that may involve experimental or unconventional product domains.
Benefits
Fully remote role with the flexibility.
Opportunity to build and scale one of the world’s largest AI‑driven consumer platforms.
Competitive compensation aligned with senior‑level engineering expertise.
4 weeks (20 working days) of paid time off annually.
Health and wellness support, including monthly allowance and mental health resources.
Annual in‑person company gathering to connect with global team members.
Co‑working space reimbursement for in‑person productivity and collaboration.
Dedicated learning budget for courses, conferences, books, and certifications.
Company‑provided equipment and home setup support.
Access to premium AI tools and developer resources to enhance productivity.
High‑impact role with strong ownership and influence over product direction.
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