About us

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 role

We are looking for a Marketing Growth Manager to join our Growth team at use.ai, one of Ruby Labs’ fastest-growing AI portfolio companies. This role owns and scales the entire paid user acquisition and creative testing engine, with direct accountability for CPA, conversion volume, and revenue growth.

This is a hands-on, execution-heavy role for someone passionate about performance marketing, creative experimentation, and data-driven growth. You will own the full funnel, from creative concept ideation through aggressive campaign scaling, acting as the bridge between creative production and performance marketing. You will work closely with the Lead Ad Creative Producer and serve as the final performance authority before campaigns scale to significant spend.

The ideal person for this role thrives in high-autonomy, high-expectation environments and is motivated by shipping fast, testing relentlessly, and scaling what works.

Key Responsibilities

• Own the entire creative testing funnel, from concept generation to winner identification.

• Design and execute a high-velocity growth engine with zero downtime in creative testing.

• Continuously generate and test 15–30 creatives in parallel, producing and validating 50+ concepts per day using AI tools.

• Define winners strictly (≥100 conversions in a single day at target CPA) and kill underperforming concepts quickly.

• Initiate aggressive scaling of validated concepts through creative, CTA, visual, actor/avatar, and environment variations.

• Launch parallel localization across priority languages (DE, FR, ES, IT) and emerging markets.

• Maintain CPA discipline during scale, including blended CPA across cold traffic and retargeting.

• Build and manage retargeting campaigns contributing 10%+ of total conversion volume.

• Execute and optimize campaigns across Meta, Google Display and Performance Max, Google and Bing retargeting, and emerging channels (TikTok, Reddit, X, AppLovin).

• Maintain strict asset naming conventions and campaign organization.

• Own creative and performance analytics, including daily reviews, centralized tracking, and rolling performance reports.

• Track CPA, CVR, ARPU, and LTV projections to ensure healthy unit economics.

• Build and maintain automation workflows for creative performance tracking with 12-hour update cycles.

• Translate performance insights into actionable creative direction for producers.

• Collaborate daily with UX researchers and data teams to identify new persona and avatar opportunities.

• Provide direct, detailed feedback to creative teams and ensure concepts target real, high-intent adult use cases.

Qualifications

• 3+ years of experience in performance marketing, growth marketing, or paid user acquisition.

• Proven track record scaling Meta and Google campaigns profitably to $5M+ per month.

• Direct experience managing high-volume creative testing pipelines (50+ concepts per month).

• Strong experience with subscription or SaaS products; consumer AI products are a strong plus.

• Experience managing multiple brands or campaigns simultaneously, ideally in an agency or multi-product environment.

• Expert-level proficiency with Meta Ads Manager, Google Ads, and analytics platforms.

• Strong understanding of the Andromeda algorithm, where creative signals outweigh targeting controls.

• Hands-on experience using AI tools for creative production (e.g., ChatGPT, Claude, Midjourney, DALL·E).

• Strong prompt engineering skills for AI-generated images and videos.

• Advanced data analysis skills, with the ability to extract insights and make fast decisions.

• Experience with automation tools such as N8N or Zapier.

• Clear, direct communication style and exceptional attention to detail.

• Highly execution-driven, data-oriented, and comfortable with ambiguity and rapid change.

Nice to have

• Experience scaling campaigns across emerging paid acquisition channels.

• Deep familiarity with Meta compliance and approval processes.

• Experience building performance tracking systems or custom growth dashboards.

• Background in high-growth consumer subscription businesses.

Location

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.

Benefits

Discover 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/1tzxGX4Uu7Ts_HCLFXESKLnKaaBfVCPf1f9AYZPrkjJM/preview?tab=t.0

Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!

Interview Process

After 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)

• Practical Task Assignment

• Final Interview (60 minutes)

Life at Ruby Labs

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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