Our Company
At Quantum, we connect global brands with high-intent consumers. We turn intent into action and complexity into clarity.

Our Mission is clear, to help smarter, faster buying decisions. Our vision, to be the world’s most used digital comparison service, delivering value and simplicity to millions.

We drive growth through data-driven affiliate marketing built for performance from day one. Every campaign is measurable, optimised in real time, and designed to scale.

With in-house tech, full-stack analytics, and a compliance-first mindset, we give our partners an edge. We drive confident decisions and growth in regulated and high-growth sectors. We’ve helped ambitious brands grow faster, smarter, and globally.

The Role

Our Rewards Commercial team is growing! We’re looking for an Account Manager to join our team in London.

In this role you will own half of our Rewards merchant portfolio across Cashback and Custard, keeping every partner healthy, renegotiating terms upward and turning existing accounts into our biggest growth lever.

Key Responsibilities

• Own a portfolio of Cashback and Custard merchant partners end to end, from onboarding through to quarterly commercial reviews

• Grow revenue within existing accounts through rate renegotiations, upsell deals and expansion into new offer types and spend commitments

• Build early warning into the portfolio: track account health, spot churn risk before it lands and act on it

• Activate new partners brought in by our Business Development team, getting them live and performing within agreed timelines

• Keep account and pipeline hygiene tight, so every relationship has a plan, a next step and a clear commercial target

About You

• Three to five years in account management or commercial roles in affiliate, cashback, loyalty or performance marketing

• A track record of growing revenue within a portfolio, not just maintaining it

• Fluent in CPA, revenue share and hybrid deal structures, and confident renegotiating them

• Organised and proactive, with a systematic approach to staying ahead of your accounts

• Comfortable working with performance data to diagnose account health and spot risk early

• You thrive when working as part of a team

• Comfortable in a fast-paced environment

• Have excellent written and verbal English skills

• Last but not least, you’ll have no ego!

What You’ll Get

• Private Health Care (Bupa)

• Hybrid Working (3 days in office)

• Travel Insurance

• Competitive Base Salary

• Company Bonus Scheme

• Paid for AI Subscription (Claude / ChatGPT / Gemini)

• Market-Leading Training Programme

• Recognition & Reward Scheme

• Annual Company Conference

• Regular Happy Hours & Team Lunches

• Free Coffee, Drinks & Snacks

What’s the next step?

Our hiring process ensures we're recruiting the right people for the role. We ensure that people are as suitable for us as we are for them.

If you like the sound of what we're all about at Quantum and want to join a team where you can make an impact, please apply or contact us at [email protected].