Middle Full-Stack Engineer

Ruby Labs is a leading tech company that creates and operates innovative consumer products across the health, education, and entertainment industries. They are building and scaling a profitable D2C product used by hundreds of thousands of customers globally, processing large volumes of traffic and revenue every month, and are entering a phase of rapid growth and expansion.

• 2–4 years of hands-on, production experience building full-stack web applications.
• Practical experience with React and Next.js, including at least 1 year working with the Next.js App Router in production.
• Solid understanding of TypeScript and modern frontend patterns.
• Proven ability to ship features independently from clear requirements to production.
• Experience with PostgreSQL, including basic query optimization and data modeling.
• Working knowledge of caching strategies and performance considerations (Redis or equivalent).
• Strong proficiency with Git, Docker, and modern development workflows.
• Comfortable with CI/CD pipelines and cloud-based environments (AWS, Cloudflare).
• Familiarity with A/B testing frameworks and using analytics to inform decisions.

Nice to have:

• CMS work experience with headless CMS platforms (Payload preferred, or Strapi, Sanity, Contentful, or similar).
• Exposure to billing and subscription systems (Stripe, Paddle, Recurly, RevenueCat, or similar).
• Experience with low-level PDF rendering or manipulation libraries (pdf-lib, PDF.js, PSPDFKit / Nutrient, Apryse, react-pdf).
• Experience with D2C SaaS or subscription-based products.
• Exposure to performance marketing, conversion optimization, or rapid MVP cycles.
• Prior experience with Nest.js or similar Node.js frameworks.
• Open-source contributions, side projects, or a strong GitHub/portfolio.

• Build, ship, and iterate on core product features across the stack.
• Take ownership of features assigned to you from implementation through production rollout and iteration.
• Implement responsive, accessible UIs using TypeScript, TailwindCSS, and established design systems.
• Work with backend services and APIs, integrating frontend logic with scalable systems.
• Participate actively in code reviews and contribute to maintaining high engineering standards.
• Debug, optimize, and improve production systems in a high-traffic environment.
• Communicate blockers, risks, and progress early and clearly.
• Work closely with Product and the rest of the engineering team to support fast, iterative delivery.

Applicants must be located within approximately ± 4 hours of the Central European Time (CET) zone to ensure optimal collaboration and communication during working hours.