Job Overview
Location
European Union
Job Type
Full-time
Category
Data Science
Date Posted
May 22, 2026
Full Job Description
đź“‹ Description
- • Lead end-to-end conversion optimization cycles from research and hypothesis generation to design, testing, rollout, and performance analysis.
- • Deliver a measurable 15% conversion rate growth per quarter through data-driven strategies and execution.
- • Perform deep funnel analysis and competitive benchmarking to identify high-impact optimization opportunities.
- • Design high-fidelity UI/UX mockups that communicate optimization vision clearly while maintaining brand integrity.
- • Collaborate directly with engineering teams to ensure accurate and flawless implementation of A/B tests and feature changes.
- • Analyze test outcomes using statistical rigor to determine significance and make confident decisions on scaling winning variants.
- • Document learnings from each test and build a systematic, scalable testing roadmap for continuous conversion growth.
- • Present insights and performance results clearly to stakeholders to build alignment, drive buy-in, and maintain momentum.
- • Maintain uncompromising attention to detail and quality across all phases of the optimization process.
- • Own full accountability for conversion performance outcomes, with compensation directly tied to exceeding KPI targets.
- • Work within the CET time zone (±4 hours) to ensure real-time collaboration with the team during core working hours.
- • Operate in a merit-based environment where performance directly impacts financial rewards and career advancement.
- • Utilize platforms such as Google Analytics, Mixpanel, and Growthbook (or similar) for data analysis and experimentation.
- • Drive optimization initiatives across subscription and SaaS funnels with documented history of performance lifts.
- • Communicate clearly and persuasively in written and spoken English to align cross-functional teams and present findings.
- • Embrace autonomy to implement vision without bureaucratic barriers in a fast-moving, results-driven culture.
- • Operate as an independent contractor under a flexible agreement that provides tax advantages, networking opportunities, and location freedom.
- • Work remotely from anywhere within ±4 hours of CET, with full equipment provided including a company MacBook.
- • Enjoy unlimited paid time off and paid national holidays to support well-being and sustainable high performance.
- • Contribute to a team culture that values ambition, ownership, speed, and measurable impact over process for process’ sake.
🎯 Requirements
- • 3+ years of hands-on CRO experience with documented performance lifts, ideally in subscription or SaaS funnels
- • Strong UI/UX design ability to create detailed, high-quality mockups
- • Proficiency in analytics platforms such as Google Analytics, Mixpanel, or Growthbook
- • Exceptional attention to detail and bias for action in fast-paced environments
- • Full ownership mentality with accountability for performance outcomes
- • Fluent written and spoken English
🏖️ Benefits
- • Remote work environment with flexibility to work from anywhere within ±4 hours of CET
- • Unlimited paid time off (PTO)
- • Paid national holidays
- • Company-provided MacBook
- • Flexible independent contractor agreement with tax advantages and autonomy
- • Merit-based compensation with substantial bonuses tied directly to exceeding KPI targets
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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