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About us

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: https://rubylabs.com/about-us/

About the role

At Ruby Labs, we are building a new Direct-to-Consumer product in the AI category, and we’re looking for an experienced Lead Full-Stack Engineer to join our team.

Our engineering organization operates using a squad-based structure, where each squad is responsible for a specific and meaningful part of the product. We are looking for a Lead Engineer who will lead one of these engineering squads, owning the technical direction, engineering quality, and delivery of that product area.

In this role, you will design and maintain scalable systems using Next.js, TypeScript, React, and Redis, while leading development processes, coordinating releases, conducting code reviews, and mentoring engineers.

Because the product itself is built around AI-powered functionality, proven experience building AI-powered tools or applications is a core requirement for this role.

You will work closely with product leadership and management to ensure the engineering team consistently delivers high-quality features with strong reliability and performance.

Key Responsibilities

• Design, develop, and maintain high-performance applications and APIs using Next.js, TypeScript, and Redis.
• Architect scalable front-end and back-end systems optimized for performance, reliability, and maintainability.
• Build efficient data caching, queues, and real-time data flows using Redis.
• Integrate and develop AI-powered product features and workflows.
• Ensure system stability through proper error handling, monitoring, and logging.
• Maintain clean and scalable codebases following SOLID principles and clean architecture.
• Lead a product engineering squad responsible for a major area of the product.
• Manage the squad’s engineering workflow, technical execution, releases, and deployment cycles.
• Conduct code reviews and uphold high engineering standards across the squad.
• Mentor junior and mid-level engineers and support their technical growth.
• Work closely with product leadership and management to align engineering execution with product priorities.
• Translate management and product leadership feedback into clear engineering priorities and execution.
• Collaborate with designers, product managers, engineers, QA specialists, the data team, and AI engineering team to deliver high-quality product features.
• Break down complex product requirements into clear technical implementation plans.
• Ensure consistent engineering velocity and delivery quality within the squad.
• Maintain documentation of system architecture, APIs, and development workflows.

Qualifications

• Strong experience with Next.js.
• Strong experience with TypeScript and React.
• Strong experience with Redis and real-time system architecture.
• Experience designing scalable web application architectures.
• Experience with API design and backend systems.
• Proven experience building AI-powered tools, products, or features.
• Experience conducting code reviews and mentoring developers.
• Strong understanding of relational databases (e.g., PostgreSQL).
• Exceptional diligence, ownership, and personal responsibility for engineering quality and delivery.

Nice to have

• Experience working in startup environments with rapid product iteration.

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: https://docs.google.com/document/d/1tzxGX4Uu7Ts_HCLFXESKLnKaaBfVCPf1f9AYZPrkjJM/preview?tab=t.0

Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!

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)
• First Interview (45 minutes)
• Second Interview (60 minutes)
• Final Interview (30 minutes)

Life at Ruby Labs

At Ruby Labs, we move fast, aim high, and expect the same from our team. We’re not here to play small—we’re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.

This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you’re hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.

Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more—more responsibility, more growth, and more success.

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