Senior Full-Stack Developer

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 platform used by hundreds of thousands of customers globally, processing large volumes of traffic and revenue every month. The product is beyond MVP, monetizing at scale, and entering rapid growth and expansion phases.

Core Technical Skills:

• At least 6 years of experience of overall full-stack application development.
• At least 2 years of experience with Next.js.
• Strong expertise in JavaScript/TypeScript and modern ReactJS.
• Experience leading a small team in a continuous deployment environment.
• Experience with CI/CD pipelines, Docker, and cloud infrastructure (preferably AWS, Cloudflare).
• Solid understanding of PostgreSQL and Redis, including performance tuning and schema design.
• Experience with A/B testing frameworks and using analytics to drive product decisions.
• Familiarity with CMS (preferably Payload).

Leadership & Collaboration:

• Demonstrated ability to mentor other engineers and elevate team performance.
• Clear communication style, able to explain complex topics clearly and concisely.
• A proactive mindset, spotting issues before they become problems and taking ownership.
• Comfortable making technical decisions and defending them with logic and data.
• Experience leading teams or projects.

Nice to have:

• Experience in D2C SaaS products.
• Exposure to performance marketing, customer funnel optimization, or rapid MVP cycles.
• Contributions to open-source or technical blogs.
• Experience working in a fast-paced, high-growth startup environment.

• Take ownership of core product components from concept to deployment.
• Collaborate with the Product team to design scalable and maintainable architectures.
• Participate in (and lead) code reviews and ensure best practices across the team.
• Mentor junior and mid-level developers, providing guidance and fostering growth.
• Contribute to hiring and onboarding new team members.
• Maintain high code quality and application performance in a fast-paced, high-traffic environment.
• Set up and improve CI/CD pipelines and development workflows.
• Monitor, debug, and improve the stability and scalability of the system.
• Help shape the engineering culture as the team grows.

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