Job Overview
Location
Ukraine
Job Type
Full-time
Category
Data Science
Date Posted
May 26, 2026
Full Job Description
đź“‹ Description
- • Own end-to-end UX strategy, design quality, and user journeys across a high-growth D2C product used by hundreds of thousands of global customers.
- • Turn UX into a measurable growth lever by directly improving activation, retention, conversion, and LTV through data-driven design decisions.
- • Collaborate closely with Product and Growth teams to optimize critical funnels including onboarding, paywalls, and retention loops.
- • Audit and continuously improve the entire user journey from acquisition through long-term engagement using behavioral data and analytics.
- • Independently analyze product analytics including Mixpanel funnels, cohort analysis, retention curves, and drop-off patterns without relying on reports.
- • Connect every UX initiative to business metrics such as activation rate, retention, and conversion, using session recordings (Clarity, FullStory, Hotjar), heatmaps, and behavioral data to identify friction points.
- • Define hypotheses, success metrics, and execute A/B tests using GrowthBook or similar tools — from implementation to result analysis.
- • Proactively request and define new analytics instrumentation and reporting needs with the data team to support UX decision-making.
- • Define, enforce, and evolve a scalable design system implemented directly in the frontend, not Figma-first.
- • Lead and direct designers and frontend engineers involved in UI/UX work — set the definition of done and raise team quality standards.
- • Establish a structured UX research practice including user interviews, surveys, and usability tests, and translate findings into prioritized product decisions.
- • Level up the existing UX researcher on the team by providing structure, frameworks, and clear priorities.
- • Maintain a high visual and interaction quality bar across the entire product.
- • Work in a fast-paced environment with daily or near-daily releases, where design is tightly integrated with engineering.
- • Operate as a systems thinker — design scalable patterns and frameworks, not one-off screens.
- • Communicate clearly the rationale behind every design decision using data and evidence.
- • Take full ownership of outcomes, not just output, with an entrepreneurial mindset and high standards for impact.
🎯 Requirements
- • Strong, hands-on ability to analyze product data independently using Mixpanel, GA4, Amplitude, or similar tools
- • Demonstrated experience driving measurable improvements in retention, activation, or LTV through UX design
- • Experience leading or managing designers and establishing a scalable design system implemented in frontend code
- • Proven ability to design and run end-to-end A/B tests (GrowthBook, Optimizely, or similar)
- • Experience conducting user research (interviews, surveys, usability tests) and translating insights into product decisions
- • 5–8+ years in UX, Product Design, or design leadership within D2C, SaaS, or consumer digital products
🏖️ Benefits
- • Remote Work Environment: Work from anywhere with flexibility to promote work-life balance
- • Unlimited PTO: Unlimited paid time off to recharge without tracking days
- • Paid National Holidays: Paid time off for national holidays
- • Company-provided MacBook: Top-tier Apple MacBook provided to all employees who need it
- • Flexible Independent Contractor Agreement: Access to tax advantages, autonomy, networking, and freedom to work globally
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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