Ruby Labs Ltd. logo

Middle Full-Stack Developer

Job Overview

Location

Ukraine

Job Type

Full-time

Category

Full-Stack Engineer

Date Posted

March 10, 2026

Full Job Description

đź“‹ Description

  • • Join Ruby Labs Ltd., a dynamic and innovative tech company at the forefront of creating cutting-edge consumer products across the health, education, and entertainment sectors. We are a rapidly growing organization driven by passionate individuals dedicated to shaping the future of consumer-led products. Our collaborative teams foster an environment where innovation thrives, and we are constantly seeking talented individuals eager to contribute to our success. Discover more about our journey and mission at https://rubylabs.com/about-us/.
  • • We are actively seeking a skilled Middle Full-Stack Developer to become an integral part of our product engineering team. In this pivotal role, you will be instrumental in the development, scaling, and continuous improvement of our successful QR code generator web SaaS product. This is a hands-on position where you will leverage your expertise across the entire technology stack, utilizing Next.js for the frontend and Node.js for the backend to craft sophisticated features that have a direct and measurable impact on our users and business objectives.
  • • Your responsibilities will extend to close collaboration with our Product, Design, and fellow Engineering teams. Together, you will transform intricate requirements into elegant, scalable, and secure software solutions. This role is situated within a fast-paced, product-centric environment. As our SaaS product is already live and experiencing significant growth, your contributions will be deployed to production swiftly, reaching and serving a global user base.
  • • While this position does not entail leading the team or solely defining architectural strategies, you will be empowered with the autonomy to take full ownership of features. We trust our developers to adhere to the highest engineering standards, continuously refine our development processes, and enhance the way we build and deliver software. This role is perfectly suited for an individual who finds satisfaction in building end-to-end features, possesses a strong commitment to code quality and performance optimization, and is eager to advance their career within a robust and supportive engineering culture.
  • • Key responsibilities include taking an active, hands-on role in developing complex features and modules, employing Next.js for the frontend and Node.js for the backend. You will be involved in implementing and refining Agile methodologies, such as Scrum and Kanban, which includes participating in sprint planning, task estimation, and overseeing the delivery of features. A critical aspect of this role is enforcing best practices in coding, comprehensive testing strategies, effective caching techniques, and diligent performance monitoring to ensure the application remains robust, scalable, and highly performant.
  • • Furthermore, you will be responsible for designing and implementing robust security measures across all layers of the application, including the infrastructure and data handling. This involves a deep understanding of security principles and their practical application in a production environment. You will also contribute to the product's evolution by working with analytics tools and A/B testing platforms, providing insights that drive product decisions and user experience enhancements. The ideal candidate will possess a strong product mindset, understanding business goals and translating them into effective technical solutions, coupled with excellent communication skills to articulate technical concepts to diverse audiences. Accountability and a results-oriented approach are paramount, as you will be expected to take ownership of your work and contribute to the overall success of the team and the product. This is an opportunity to make a significant impact in a growing company, working on a product used by thousands of users worldwide, and to further develop your full-stack development skills in a supportive and forward-thinking environment.

Skills & Technologies

JavaScript
Go
Ruby
Next.js
Node.js
Full Stack
Mid-level
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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