
Job Overview
Location
European Union
Job Type
Full-time
Category
Full-Stack Engineer
Date Posted
March 16, 2026
Full Job Description
đź“‹ Description
- • As a Lead Full-Stack Engineer at Ruby Labs, you will be at the forefront of innovation, spearheading the development of a groundbreaking Direct-to-Consumer product within the dynamic AI category. This pivotal role places you at the helm of an engineering squad, empowering you to shape the technical vision, uphold engineering excellence, and drive the successful delivery of a critical product area. You will be instrumental in architecting and implementing robust, scalable, and high-performance applications and APIs, leveraging a modern tech stack including Next.js, TypeScript, React, and Redis.
- • Your responsibilities will extend to the intricate design and meticulous maintenance of both front-end and back-end systems, ensuring they are optimized for peak performance, unwavering reliability, and long-term maintainability. A key aspect of this role involves building efficient data caching strategies, implementing robust queuing systems, and establishing real-time data flows using Redis, crucial for the responsiveness and scalability of our AI-powered features.
- • A core component of this position is the direct integration and development of AI-powered product features and workflows. You will be tasked with translating complex AI concepts into tangible, user-facing functionalities, ensuring seamless integration and optimal performance. This requires a deep understanding of how to build and deploy AI-driven applications.
- • You will be the guardian of system stability, implementing comprehensive error handling, proactive monitoring, and detailed logging to ensure our applications are resilient and performant under all conditions. Maintaining code quality is paramount; you will champion clean, scalable codebases that adhere to SOLID principles and clean architecture, fostering an environment of technical excellence.
- • Leading an engineering squad means you will own the entire engineering workflow for a significant product area. This includes managing technical execution, coordinating releases, and overseeing deployment cycles, ensuring a smooth and efficient development process. Your leadership will be crucial in maintaining consistent engineering velocity and ensuring the highest quality of delivery from your team.
- • A significant part of your role will involve conducting thorough code reviews, setting and upholding rigorous engineering standards across the squad. You will also play a vital role in mentoring junior and mid-level engineers, fostering their technical growth and career development, thereby building a stronger, more capable engineering team.
- • Collaboration is key. You will work hand-in-hand with product leadership and management to ensure engineering efforts are tightly aligned with overarching product priorities. This involves translating strategic feedback from management and product leadership into actionable engineering tasks and clear execution plans.
- • You will be a central point of collaboration, working closely with designers, product managers, fellow engineers, QA specialists, the data team, and the AI engineering team. This cross-functional synergy is essential for delivering high-quality product features that meet and exceed user expectations.
- • Your ability to break down complex product requirements into clear, concise technical implementation plans will be critical for the squad's success. You will ensure that the team consistently delivers high-quality features with strong reliability and performance, contributing directly to the success of our new AI product.
- • Furthermore, you will be responsible for maintaining comprehensive documentation of system architecture, APIs, and development workflows, ensuring knowledge transfer and long-term project sustainability. This role offers a unique opportunity to make a significant impact on a cutting-edge AI product, grow your leadership skills, and contribute to a fast-paced, ambitious company culture.
Skills & Technologies
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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