CRO Manager (use.ai)

Ruby Labs Ltd.

Job Overview

Location

European Union

Job Type

Full-time

Full Job Description

📋 Description

• The CRO Manager role at Ruby Labs Ltd. focuses on driving top-of-funnel growth by optimizing user registration and payment funnels in a B2C environment, directly impacting conversion rates, lifetime value, and customer acquisition cost.
• Day-to-day responsibilities include launching and iterating on product experiments daily and weekly, owning the experimentation backlog, writing PRDs and experiment briefs, generating experiment ideas using UX research and data insights from Mixpanel and Claude, managing the full experiment lifecycle, collaborating with developers for fast delivery, controlling release flow across dev/staging/production, ensuring accurate tracking and A/B test setup via GrowthBook and Mixpanel, and delivering daily/weekly performance insights.
• Ruby Labs is a leading tech company creating innovative consumer products across health, education, and entertainment industries, with a mission to build consumer-led products and a culture that values ambition, impact, and high execution speed.
• In this role, the individual will develop deep expertise in growth product management, master end-to-end experimentation frameworks, sharpen data-driven decision-making skills, and gain hands-on experience with advanced analytics and feature flagging tools, positioning them for leadership in high-velocity growth environments.

🎯 Requirements

• 5+ years of combined experience in product management and growth, with at least 3+ years in growth/product optimization roles
• Proven track record of optimizing web funnels in B2C environments, directly impacting CR, LTV, and CPA
• At least 1 year of experience in a high-velocity growth environment where experiments are launched daily or weekly
• Strong hands-on experience running A/B tests end-to-end (hypothesis → setup → analysis → decision)
• Deep proficiency with product analytics tools, especially Mixpanel (funnels, cohorts, event-based analysis)
• Experience with experimentation and feature flagging tools like GrowthBook

🏖️ Benefits

• Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance
• Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days
• Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge
• Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them
• Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities

Skills & Technologies

Ruby

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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