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Senior Next.js Full Stack Engineer

Job Overview

Location

European Union

Job Type

Full-time

Category

Full-Stack Engineer

Date Posted

April 17, 2026

Full Job Description

đź“‹ Description

  • • Senior Next.js Full Stack Engineer role focused on scaling a profitable D2C platform used by hundreds of thousands of customers globally, processing high traffic and revenue volumes.
  • • Day-to-day responsibilities include taking ownership of core product components from concept to deployment, collaborating with Product on scalable architecture, leading code reviews, mentoring junior and mid-level developers, contributing to hiring and onboarding, maintaining high code quality and performance, improving CI/CD pipelines, monitoring system stability, and shaping engineering culture.
  • • Ruby Labs is a leading tech company building innovative consumer products across health, education, and entertainment, with a battle-tested product now entering rapid growth and expansion, recently launching a second product in the same ecosystem.
  • • The role offers opportunity to shape architecture, improve reliability, raise engineering standards, gain leadership experience in a high-paced environment, and drive impact on systems used by real users at scale.

Skills & Technologies

JavaScript
TypeScript
Go
Ruby
React
Full Stack
Senior
Remote

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About Ruby Labs Ltd.

Ruby Labs Ltd. is a London-based product studio that builds and scales consumer subscription mobile and web applications. The company focuses on health, wellness, and productivity verticals, developing apps such as Hint, Able, and the award-winning fitness platform FitCoach. Using data-driven growth and proprietary technology, Ruby Labs rapidly prototypes, launches, and iterates products to serve millions of global users. The team combines engineering, product design, and performance marketing expertise to create sustainable digital businesses. Founded in 2018, Ruby Labs operates a portfolio of self-funded apps, emphasizing user privacy, scientific validation, and long-term customer value.

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