UX Lead (Product & Growth)

Ruby Labs Ltd.

Job Overview

Location

European Union

Job Type

Full-time

Full Job Description

📋 Description

• Own end-to-end UX strategy and design quality for a high-growth D2C product used by hundreds of thousands of global customers, directly influencing activation, retention, and conversion metrics.
• Transform UX from a support function into a measurable growth lever by aligning design decisions with business outcomes such as LTV, retention curves, and funnel conversion rates.
• Audit and continuously improve the entire user journey—from acquisition through onboarding, paywalls, retention loops, and long-term engagement—with data-driven insights.
• Independently analyze product analytics using Mixpanel, GA4, Amplitude, or similar tools to identify drop-off patterns, cohort behaviors, and engagement trends without relying on data team reports.
• Define hypotheses, design A/B tests using GrowthBook or equivalent platforms, and analyze results to validate UX changes with statistical rigor.
• Utilize session recordings (Clarity, FullStory, Hotjar), heatmaps, and behavioral data to pinpoint friction points in user flows and prioritize high-impact improvements.
• Proactively request, define, and spec new analytics instrumentation and reporting needs in partnership with the data team to close data gaps.
• Lead, direct, and elevate a team of designers and frontend engineers involved in UI/UX work, setting clear standards for the definition of done and quality expectations.
• Define, enforce, and evolve a scalable design system that is implemented directly in the frontend, not created first in Figma.
• Establish a structured UX research practice—including user interviews, surveys, and usability tests—to generate both qualitative and quantitative insights.
• Translate raw research findings into prioritized, actionable product decisions that align with business goals and engineering constraints.
• Direct and mentor the existing UX researcher on the team, providing frameworks, clear priorities, and structured feedback to raise team performance.
• Maintain a high visual and interaction quality bar across all product surfaces, ensuring consistency and polish in every user-facing element.
• Work in a fast-paced environment with daily or near-daily releases, where systems thinking and scalable patterns are prioritized over one-off screen designs.
• Communicate the rationale behind every design decision using data, research, and business impact, ensuring alignment across product, engineering, and growth teams.
• Operate with full ownership of outcomes—not just output—driving initiatives to completion without requiring oversight or handholding.
• Contribute to building the foundational UX and research infrastructure for multiple future products within the company’s portfolio.

🎯 Requirements

• Strong, hands-on ability to independently analyze product data using Mixpanel, GA4, Amplitude, or similar tools
• Demonstrated experience driving measurable improvements in retention, activation, or LTV through UX-led initiatives
• Experience leading or managing designers and setting design quality standards in a frontend-implemented environment (not Figma-first)
• Proven track record of designing and running end-to-end A/B tests (e.g., GrowthBook, Optimizely) to validate UX changes
• 5–8+ years in UX, Product Design, or design leadership within D2C, SaaS, or consumer digital products
• Deep understanding of conversion funnels, retention loops, and user behavior at scale

🏖️ Benefits

• Remote Work Environment: Work from anywhere with flexibility in schedule and location
• Unlimited PTO: Unrestricted paid time off to recharge and prioritize well-being
• Paid National Holidays: Guaranteed paid days off for national holidays
• Company-provided MacBook: Top-tier Apple MacBook supplied to all employees who need one
• Flexible Independent Contractor Agreement: Access to tax advantages, reduced employment obligations, and entrepreneurial autonomy

Skills & Technologies

JavaScript

Ruby

React

Next.js

Design

Senior

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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