Lead Full-Stack Engineer

About Us

Ruby Labs Montenegro, Rio Grande do Sul, Brazil

Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at:

About The Role

We’ve recently launched a new D2C product in the LegalTech/Utilities space and are looking for a Lead Full-Stack Engineer (Next.js) . You’ll be responsible for hands-on development, contributing to architectural decisions, and helping to build and guide a small engineering team as the product scales. This role is ideal for someone who is technically sharp, highly accountable, and ready to step into ownership and leadership. If you're looking for a conventional 9–5 job, this may not be the right fit. But if you're ready to go the extra mile to grow, build at high speed, you are excited about technology and the opportunity to shape both the product and the team—read on.

Key Responsibilities

• 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.

Qualifications Core Technical Skills

• At least 4 years of experience with Next.js for full-stack application development.
• At least 2 years of experience with Next.js App Router.
• 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 — you spot issues before they become problems and take ownership.
• Comfortable making technical decisions and defending them with logic and data.
• Experience leading small teams or projects.

Nice to have

• Experience in D2C SaaS or LegalTech/Utility 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.

Location

Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately ± 4 hours of CET. This ensures optimal collaboration and communication during working hours.

Benefits

Discover the perks of being part of our vibrant team We offer:

• Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
• Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
• Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.
• Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
• Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here:

Interview Process

After submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:

• Recruiter Screening (40 minutes)
• Technical Interview (90 minutes)
• Final Interview (60 minutes)

Life at Ruby Labs

At Ruby Labs, we are more than a team; we're a community united in pushing the boundaries of technology and innovation. Our combined passion fuels our ambition for excellence, driving impact that resonates around the globe.

We are an equal-opportunity employer and celebrate diversity, recognizing that a diversity of thought and backgrounds builds stronger teams. We approach diversity and inclusion seriously and thoughtfully. We do not discriminate based on race, ethnicity, religion, color, place of birth, sex, gender identity or expression, sexual orientation, age, marital status, military service status, or disability status. Join us and be part of a company that is crafting the future of technology across multiple industries.

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