Customer Growth Manager

A founder-facing role at a fast-growing UK fundraising platform. The Customer Growth Manager will own the relationship with the company’s most important corporate customers, from onboarding through to retention, reactivation and growth, and will build the systems that make that possible at scale.

The Company

We’re building the UK’s most innovative fundraising platform. Winners of a national StartUp for Good Award in 2026, we’re on a mission to become the most impactful force for good in digital fundraising. To date, we’ve processed over £25 million in donations across our platform.

We’re expanding our core team and looking for someone who wants to work closely with the founders, take real ownership and help shape how a fast-growing fundraising business serves and grows its customers.

The Basics

● Location: East London (2/3 days in office)

● Working pattern: Full-time (40 hours)

● Salary: £40-£50k

● Reports to: Founders

The Opportunity

The client has built a market-leading fundraising product. The next job is to make the experience around that product just as good.

This is a chance to sit at the intersection of customer success, account management, commercial growth and operations, working directly alongside the founders. There is no detailed playbook. The person who joins will decide what good looks like, build it and own the results.

The Role

This is a highly hands-on position. The Customer Growth Manager will manage key customer relationships, oversee day-to-day support, find opportunities to increase customer engagement and usage, and build the processes that allow all of it to scale. They will be asking where customers are getting stuck, who isn’t getting enough value, what could be automated and who could benefit from more of the product, and then acting on the answers.

Customer growth and account management

• Own relationships with key corporate customers

• Proactively engage customers and drive adoption, retention and growth

• Build structured onboarding, account management and reactivation processes

• Identify opportunities to deepen relationships and increase use of the platform

Customer experience and support

• Own the quality and responsiveness of the customer experience

• Oversee day-to-day support, using AI and automation where appropriate

• Identify recurring customer problems and work with product and operations to fix them at source

• Improve customer communications and lifecycle journeys

Systems and automation

• Build CRM processes and customer journeys that allow customers to be managed at scale

• Use data, AI and automation to improve customer experience and internal efficiency

• Turn successful approaches into repeatable processes

• Create stronger feedback loops between customers, product and operations

What success looks like

• Customers are onboarded effectively and get maximum value from the platform

• Key customers receive proactive account management

• Support is fast, consistent and increasingly scalable

• Customer friction is identified and removed

• Disengaged customers are reactivated and adopt more of the platform

• Customer insight drives product and operational improvements

The Person

The client is looking for someone commercial, proactive, autonomous and naturally customer-focused. They will be comfortable taking an ambiguous problem, working out what needs to happen and making it happen without a detailed playbook.

Relevant experience could come from:

• Customer success or account management

• B2B sales or customer growth

• Customer operations or commercial operations

• SaaS, fintech or marketplace businesses

• CRM or lifecycle marketing

Experience in a small or fast-growing company would be particularly valuable.

Your recruiter for this role is Charlotte Wood, Recruitment Consultant at Jobs In. Fitness, and can be contacted simply by applying for this role below. Jobs In. Fitness are a fitness recruitment agency, specialising in hundreds of fitness jobs in the UK like these. If you are keen to be considered please 'apply now'. Please note that only applicants matching the strict criteria above will be contacted as part of the recruitment process.