Paid Social Performance Manager

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A Marshmallow career is built on a cycle of continuous growth, with learning at its core. You will be challenged to raise the bar on your capabilities and supported with the right tools and guidance to do so. This ensures you can deliver impactful work and drive change.

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Move our mission, and your career, forward.

You’re a hands-on Performance channel expert with significant Paid Social experience, who has managed complex accounts in-house, without reliance on agency partnerships. You boast a demonstrable track record of scaling and optimising performance.

You have proven experience managing Meta (Facebook and Instagram) performance channels in-house, owning budgets, strategies and results. You combine commercial acumen with the ability to deliver results at pace.

You work confidently with cross-functional teams including data, product, agencies and platform partners, ensuring alignment with our growth priorities. You’re passionate about performance and paid social and operate at the forefront of channel and industry innovation and best practice, ensuring we’re always best in class.

Having full accountability for channel outcomes, you thrive in a fast-paced, high-growth environment where priorities can shift quickly and you’ll be comfortable making decisions in ambiguity.

Experience in regulated industries, in particular Financial Services is an advantage, as is a proven ability to navigate complex compliance requirements.

• Own Paid Social channel performance from strategy to execution

• Allocate budgets across full funnel campaigns to drive efficiency

• Develop integrated full-funnel campaign strategies across awareness, prospecting and retargeting

• Actively collaborate with data and product peers to enhance the performance of your channels and the customers experience

• Collaborate with creative teams to brief creatives based on performance and audience insights

• Run lift tests and experiments to measure incrementality of Paid Social campaigns

• Identify cross-channel opportunities and share insights on audience and creative

• Confidently forecast channel level performance

• Report to stakeholders, translating performance into business outcomes

• Hands-on Execution - Demonstrates a strong command of paid social campaign operations. Oversees campaign health across multiple platforms, ensuring pacing, delivery, and performance are on track. Comfortable delegating campaign build and QA tasks to team members while maintaining ultimate accountability for accuracy and quality. Balances strategic oversight with the ability to get “hands-on” when needed, particularly during launches or troubleshooting.

• Analytical Skills - Uses data to tell compelling stories and inform decisions. Conducts deep dives into campaign performance to identify trends, opportunities, and risks. Proficient in data visualisation and analytics tools (e.g. Looker, GA) to build dashboards, monitor KPIs, and generate actionable insights. Comfortable working with large datasets and translating analysis into clear recommendations for non-technical stakeholders.

• Forecasting and Planning - Develops accurate channel forecasts and budget plans aligned with business objectives and commercial cycles. Understands how to model performance based on historical data, seasonality, and market trends. Able to set realistic targets, optimise spend allocation across campaigns, and track progress against forecasts. Brings structure to planning processes to ensure teams can deliver against business growth goals.

• Technical Background - Demonstrates a solid technical understanding of paid social ecosystems. Capable of diagnosing and resolving tracking, data, and audience issues, including pixel implementation, UTM structure, and conversion API setup. Ensures all campaigns are set up correctly, compliant with platform requirements, and accurately measured. Can work effectively with engineering, analytics, or third-party partners to troubleshoot complex issues.

• Tactics & Optimisation - Builds and executes structured creative and audience testing roadmaps. Identifies scalable tactics to drive efficiency and growth across Facebook and Instagram. Comfortable experimenting with new formats, targeting options, and bid strategies, while applying a disciplined approach to testing. Optimises campaigns continuously to achieve performance targets, balancing short-term wins with long-term learning agendas.

• Channel Strategy - Designs full-funnel paid social strategies that integrate with broader marketing plans. Understands how to drive reach, engagement, and conversion across different campaign objectives. Evaluates campaign performance not only on immediate ROAS or CPA, but also on profitability, scalability, and contribution to the wider marketing mix. Aligns channel strategy with brand positioning and audience insights.

• Wider Business Context - Aligns paid social budgets and activity with overall commercial goals and cycles. Understands how paid social performance impacts wider business metrics, including revenue, margin, and customer lifetime value. Works closely with finance, product, and other marketing teams to ensure plans are well integrated and support company priorities. Acts as a strategic partner, not just a channel specialist.

• Future Obsessed - Evolves targeting and creatives based on insights

• Raise the Bar - Elevates the team's technical and creative execution

• Cultural Icon - Encourages cross-team collaboration

• Always Deliver - Meets or exceeds OKR targets

• Hybrid working - Spend 3 days a week with your team in our collaborative London office 🏢

• Competitive bonus scheme - designed to reward and recognise high performance 🌟

• Flexible benefits budget - £50 per month to spend on a Ben Mastercard meaning you get your own benefits budget to spend on things you want. Whether that’s subscriptions, night classes (puppy yoga, anyone?), the big shop or a forest of houseplants. Pretty much anything goes 💰

• Sabbatical Leave - Get a 4-week fully paid sabbatical after being with us for 4 years 🏝️

• Work From Anywhere - 4 weeks work from anywhere to use, with no need to come to the office 🛫

• Mental wellbeing support – Access therapy and mental health sessions through Oliva 💚

• Learning and development – Personal budgets for books and training courses to help you grow in your role. Plus 2 days a year - on us! - to further your skillset 🤓

• Private health care - Enjoy all the benefits Vitality has to offer, including reduced gym memberships and discounts on smartwatches 🏥

• Medical cash plan - To help you with the costs of dental, optical and physio (plus more!)

• Tech scheme - Get the latest tech for less 🖥

Plus all the rest; 25 days holiday (+ bank holidays), pension, cycle to work scheme, monthly team socials and company-wide socials every month!

We break it up into 4 stages:

• Initial call with a member of our Talent Acquisition team (40 mins)

• A past-experience interview (60 mins)

• A skill-based/technical interview (60 mins)

• A culture interview to check that your work style fits our processes and values (60 mins)

We’ll let you know if you’re invited to an interview or not. But, as a small team with a lot of applications to consider, we can’t give individual feedback on each application

Background checks
As part of our commitment to maintaining a safe and trustworthy environment, we’ll carry out standard background checks, including a DBS and a Cifas check. These help ensure there are no ongoing criminal proceedings and support the prevention of fraud and other forms of serious misconduct. If anything of concern is identified, it may affect your eligibility for certain roles or services. Feel free to ask our Talent Acquisition team if you have any questions about this!

At Marshmallow, we want to hire people from all walks of life with the passion and skills needed to help us achieve our company mission. To do that, we're committed to hiring without judgement, prejudice or bias.

We encourage everyone to apply for our open roles. Gender identity, race, ethnicity, sexual orientation, age or background does not affect how we process job applications.

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