Growth Marketing Manager: Paid Social

Who We Are

For too long, the bra industry was stuck in outdated ideas, forcing women to choose between feeling sexy or comfortable. So in 2013, Heidi Zak and Ra'el Cohen created Thirdlove-a third, better option designed to help women look and feel their best.

Prioritizing real-world fit over outdated standards, Thirdlove disrupted the industry by inventing half-cup sizes and the Fitting Room® quiz. The result was a more precise fit that offered comfort without sacrificing style. Today, Thirdlove remains an innovative design-led brand, handling everything from R&D to the supply chain in-house to get every detail just right.

How We Work

Our culture is inclusive, collaborative, fast-paced, and data-driven. We've been certified as a Great Place to Work® for four consecutive years, based on feedback from our own team. If you want to make an impact while propelling your career forward, we'd love to hear from you.

What We Are Looking For

As the Growth Marketing Manager for Paid Social, you will own Meta, TikTok, and support on Pinterest from strategy through execution. You will oversee platform and agency relationships, direct AI tools for optimization, partner with internal teams on creative briefs and testing, and be the person who drives how we grow on these platforms. You understand that winning on Meta requires both a data-driven and creatively-led approach. You treat Paid Social as a strategic function, take performance personally, have strong opinions about creative, and bring a genuine point of view to every channel decision.

What You Will Own And How You Will Make A Difference

Own paid social strategy across Meta and TikTok

• Set the channel strategy for Meta, TikTok, and support on Pinterest including account and campaign architecture, funnel coverage, and budget allocation across each platform
• Own budget pacing across all three channels; make real-time reallocation decisions based on performance signals
• Lead incrementality test design for social channels in coordination with our measurement stack
• Contribute channel-level commentary to weekly cross-channel performance reporting
• Stay ahead of platform product changes, beta opportunities, and algorithm shifts on each platform

Manage platform and agency relationships

• Serve as the primary point of contact for all platform and agency relationships
• Manage day-to-day communication and performance accountability with any external partners on your channels
• Evaluate partner and vendor performance against clear outcomes; own the relationship and the decisions that come with it
• Consolidate institutional knowledge internally so that performance insights and channel history live with the team, not outside it

Direct, evaluate, and push back on AI tools

• Oversee and direct AI execution tools for bid management, audience optimization, pacing, and creative performance with curiosity about what they can do and healthy skepticism about when they are not working
• Interrogate automated optimization outputs: understand what the tool is doing, why it is making those decisions, and whether the logic actually serves the strategy
• Push back when AI-recommended actions do not hold up to scrutiny; override confidently and document what you learned
• Set guardrails, test protocols, and performance benchmarks that hold AI tools accountable to real outcomes, not just internal optimization metrics
• Lead AI tool evaluation with an analytical eye; you define the test and interpret the results

Partner on creative strategy and testing

• Work closely with key stakeholders on creative brief direction - bring the performance signal and channel hypothesis to inform what gets made and why
• Bring a channel-native creative perspective to every brief: what works on Meta is not what works on TikTok; you know the difference and can articulate why
• Surface creative fatigue signals early and feed them into the brief cycle before performance degrades
• Collaborate on landing page testing by providing performance data and hypotheses on where the post-click experience is limiting paid efficiency
• Participate in creative QA before launch and contribute to post-launch performance interpretation

You Have

• 5-7 years of hands-on experience in paid social, with a meaningful portion managing Meta Ads at scale (six-figure monthly budgets or above)
• Deep working knowledge of Meta Ads Manager - campaign structure, auction mechanics, creative testing, Advantage+ features, and attribution settings
• A genuine creative sensibility: you have strong opinions about what makes paid social work, and you can translate that into a brief or a feedback session
• Strong analytical fluency: you can build a performance narrative from raw data, not just pull a report
• Experience with or strong understanding of TikTok Ads - creative-first, algorithm-dependent, and very different from Meta in ways that matter
• Experience managing or coordinating external agency or vendor relationships, with accountability for their performance outcomes
• Cross-functional instincts: you have worked with creative teams, data teams, site teams, and external partners and found ways to move forward even when priorities differ
• An evaluative relationship with AI and automation tools - genuinely interested in their potential and willing to champion them, but equally willing to question the output, stress-test the logic, and push back when the results do not add up

Bonus if you have

• Pinterest Ads experience - understanding of the platform's discovery-intent creative dynamics
• Experience managing or directing AI execution tools for paid channel execution
• Familiarity with MMM, MTA, or incrementality testing methodologies
• In-house DTC or e-commerce experience where you owned your channels with direct business accountability

ThirdLove Offers You

• Competitive salary + equity
• Medical/Dental/Vision insurance
• Paid parental leave
• Flex time off
• Discounted and free products

Diversity

ThirdLove is an equal opportunity employer and values diversity at the company. We do not discriminate on the basis of race, religion, color, national origin, gender, gender identity or expression, sexual orientation, age, genetics, marital status, veteran status, or disability status.

ThirdLove is an E-Verify employer and will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the U.S. For more information please visit E-Verify.

Thirdlove is an equal opportunity employer. We consider all qualified applicants, including those with arrest or conviction records, consistent with applicable law - including the San Francisco and Los Angeles City and County Fair Chance Ordinances and the California Fair Chance Act.

Compensation

95-120K annual base compensation