Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at: https://rubylabs.com/about-us/
About the roleWe are hiring a hands-on, mid-level Product Owner with a strong experimentation mindset to drive Conversion Rate Optimization (CRO) across our high-traffic funnels. You will partner closely with Engineering and Design to run daily tests, learn quickly from data, and iterate fast. This is ideal for a data-driven operator who enjoys seeing impact quickly, is light on their feet, and is comfortable doing scrappy manual work when needed.
Key ResponsibilitiesMaintain a fast experimentation cadence: design, launch, and analyze A/B/MVT tests daily across landing pages, onboarding, pricing, paywalls, and key user flows.
Frame hypotheses and success metrics upfront; ensure statistical rigor (power calculations, guardrails, stopping rules) and clean handoffs to analysis.
Prioritize by expected impact (ICE), speed-to-learn, and compounding effects; keep a transparent CRO roadmap.
Partner with Engineering and Design to scope small, high-leverage changes; write crisp specs and acceptance criteria.
Instrument analytics with Engineering (events, properties, funnels); ensure data quality and dashboard freshness.
Synthesize learnings into playbooks and patterns; scale winners, deprecate losers, and roll insights into the backlog.
Conduct lightweight qualitative research (user calls, intercepts, session replays) to complement quantitative signals.
Collaborate with Marketing on traffic quality, ad-to-landing message match, and experiment routing.
3–5 years in Product (PO/PM) with a growth/CRO focus; shipped and analyzed many experiments end-to-end.
Strong analytical skills: experiment design, funnel diagnostics, segmentation, cohort reads; comfort deciding from imperfect data.
Practical statistics: sample size/power, MDE, sequential testing risks, avoiding p-hacking.
Excellent written communication skills; crisp specs, hypotheses, and decision memos.
Bias to action, high ownership, comfortable doing manual work to move faster.
Experimentation platforms: GrowthBook, Optimizely, VWO, LaunchDarkly (feature flags), GA4 experiments.
Analytics: GA4, Mixpanel/Amplitude, basic SQL for ad-hoc queries; visualization (Tableau/Looker/Metabase).
Understanding of paid acquisition platforms and how traffic mixes impact CRO.
Familiarity with front-end stacks (e.g., Next.js/React, SwiftUI) to collaborate effectively and make smart trade-offs.
Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately ± 4 hours of CET. This ensures optimal collaboration and communication during working hours.
BenefitsDiscover the perks of being part of our vibrant team! We offer:
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. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here: https://docs.google.com/document/d/1dHF4ctKlez75whdn-ybUwP5d5Wr0BdwVrorrm_fM40Q/preview
Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!
Interview ProcessAfter submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:
Recruiter Screening (40 minutes)
Technical Interview (90 minutes)
At Ruby Labs, we move fast, aim high, and expect the same from our team. We’re not here to play small—we’re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.
This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you’re hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.
Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more—more responsibility, more growth, and more success.
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