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Junior–Mid Full Stack Engineer

Job Overview

Location

European Union

Job Type

Full-time

Category

Full-Stack Engineer

Date Posted

April 26, 2026

Full Job Description

📋 Description

  • As a Junior–Mid Full Stack Engineer at Ruby Labs, you will contribute to building a new Direct-to-Consumer product in the AI space, helping shape innovative consumer-facing web applications that impact users across health, education, and entertainment sectors.
  • Your day-to-day work will involve developing web features using Next.js, React, and TypeScript, implementing APIs and backend functionality under senior guidance, working with databases and caching tools, fixing bugs, writing clean code, participating in code reviews, and collaborating with product, design, and engineering teams to deliver new features.
  • You will join a fast-moving, innovative tech company that builds and operates consumer products across multiple industries, with a culture focused on ambition, impact, and growth, where engineers are empowered to take ownership and grow their skills on high-scale systems.
  • In this role, you will deepen your full-stack expertise, gain hands-on experience with modern frontend and backend technologies, improve your ability to work in Agile environments, and grow into a more autonomous engineer capable of owning features from concept to production while contributing to AI-powered products.

Skills & Technologies

JavaScript
TypeScript
Go
Ruby
React
Full Stack
Junior
Remote

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Ruby Labs Ltd.
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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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