About this role.
Ruby Labs is hiring a Senior User Acquisition Manager to own and scale Facebook as a performance channel for D2C subscription products. The role involves managing a seven-figure budget, driving high-ROI growth across multiple geos, and collaborating with creative and analytics teams. Candidates need 3+ years of hands-on Facebook ad experience and advanced skills in Excel, Tableau, and Mixpanel. The position is remote within CET ±4 hours and offers unlimited PTO.
Role DNA
A quick view of the complexity, pace, ownership and collaboration implied by the job description.
Job Complexity
4/5Pace & Pressure
4/5Autonomy Level
5/5Communication Load
4/5Salary analysis
Estimated compensation compared with the broader US market for similar roles.
Core skills
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Cover letter sample
Dear Hiring Manager,
I am excited to apply for the Senior User Acquisition Manager position at Ruby Labs. With over 3 years of hands-on experience managing Facebook as a primary performance channel, I have a proven track record of scaling campaigns to seven-figure budgets while maintaining high ROI and CPA efficiency. My expertise in running multi-geo D2C subscription funnels and building custom performance models in Excel, Tableau, and Mixpanel aligns perfectly with the requirements of this role.
I thrive in autonomous environments and am known for my data-driven decision-making and proactive testing strategies. I have successfully managed creative fatigue through structured testing and collaborated closely with creative teams to develop high-performing ads. I am confident that my skills in channel ownership and analytical rigor will contribute to Ruby Labs' continued growth.
Thank you for considering my application. I look forward to the opportunity to discuss how I can drive results for your team.
Sample interview questions
I start by ensuring campaign structure is optimized, using CBO and detailed targeting. I implement a rigorous testing roadmap for audiences and creatives, and use data from Mixpanel to adjust bids and budgets based on CPA and ROAS. I also expand into new geos gradually.
I had a campaign that initially showed promising results but after scaling, CPA increased. I analyzed cohort data and found that long-term LTV was lower than expected. I paused the campaign and reallocated budget to higher-performing segments.
I provide clear data-driven feedback on which angles and hooks are driving conversions. I set up a systematic testing framework with a creative brief and A/B test variations, then share performance results to guide future production.
I track frequency, click-through rate, conversion rate, and more importantly, ARPU and LTV by cohort. I also monitor creative fatigue indicators and audience saturation.
I use a structured account hierarchy, allocate budgets based on performance potential, and set up automated rules for scaling. I prioritize geos with strong unit economics and adjust strategies based on local market nuances.
About Us
Ruby Labs is a leading technology company specializing in innovative consumer products across multiple technology sectors. The company focuses on D2C (Direct-to-Consumer) subscription products. 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 Senior User Acquisition Manager to own and scale Facebook as a performance channel for one of our core D2C subscription products. You will be fully responsible for the channel end to end -strategy, scaling it to a 7-figure budget, campaign structures, creative testing, and consistent, high-ROI growth across multiple geos, driving subscriptions through web funnels.
This is a hands-on role suited for someone who runs a channel like a business, not a set of campaigns. You are expected to make independent, data-driven decisions, present a clear weekly strategy, and keep performance stable.
Key Responsibilities
Channel Ownership & Performance
Own and optimize the Facebook ad account end to end – structure, bidding, budget allocation, scaling.
Maintain high subscription volume while driving efficient CPA and positive ROAS.
Prepare and present a clear weekly channel strategy with results and next steps.
Testing & New Approaches
Continuously test new campaign structures, audiences, bidding strategies, and placements.
Identify and pilot new approaches before performance plateaus, scaling what works.
Run structured creative testing to find winning angles, hooks, and formats.
Creative Collaboration
Work closely with the creative team to develop high-performing ad creatives.
Provide data-driven feedback on angles and messaging to guide production.
Manage creative fatigue proactively, rotating and refreshing at high spend levels.
Analytics & Data
Build custom performance models, analyses, and reporting in Excel, Tableau, and Mixpanel.
Develop growth plans based on CPA, ROAS, and ARPU cohort data with the data team.
Own the channel testing roadmap: audiences, bidding, geo-expansion, and landing funnels.
Qualifications
Must-Have Experience
3+ years of hands-on paid social experience, with Facebook as a primary channel you have owned.
Experience managing six-figure monthly ad spend on Facebook with clear ROI accountability.
Proven track record maintaining high volumes profitably while continuing to scale.
Experience driving subscriptions through web funnels (web-to-web) for D2C products.
Deep Meta platform knowledge: account structures, audience targeting, bidding strategies, and creative testing methodology.
Multi-GEO experience running and scaling campaigns across multiple countries.
Advanced Excel skills plus proficiency in Tableau and Mixpanel — you build your own performance models and frameworks.
Operating Attributes
Autonomous and proactive – takes full ownership of the channel and operates with minimal oversight.
Highly analytical – every scaling and kill decision is grounded in data, not intuition alone.
Fast under load – runs multiple campaigns, tests, and reporting streams in parallel without letting quality slip.
Always testing – looks for new approaches beyond what already works instead of defending the status quo.
Clear, direct communicator – presents insights, results, and recommendations to stakeholders.
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.
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)
Technical 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.
All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law.
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