ThirdLove
For too long, the bra industry was stuck in outdated ideas, forcing women to choose between feeling sexy or comfortable.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Prioritizing real-world fit over outdated standards, Thirdlove disrupted the industry by inventing half-cup sizes and the Fitting Room® quiz.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.
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.
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.
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
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) in fashion and/or apparel e-commerce industries
Deep working knowledge of Meta Ads Manager — campaign structure, auction mechanics, creative testing, Advantage+ features, product feed management, 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
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
Competitive salary + equity
