Experienced Customer Success Manager – Driving Net Revenue Retention and Customer Delight in a High-Growth HR Tech Startup

At arenaflex, we're revolutionizing the world of HR tech with our innovative software solutions that empower in-house recruitment teams to attract, hire, and onboard the right talent. As a high-growth startup, we're constantly pushing the boundaries of what's possible, and we're looking for a seasoned Customer Success Manager to join our team and help us scale.

About arenaflex

arenaflex is a dynamic and ambitious HR tech startup that's making waves in the industry. With a strong foundation in place, we've got a mature product, a solid product-market fit, and happy customers. Our rapid growth has brought exciting new challenges, and we're looking for an experienced Customer Success Manager to help us navigate them. As a key member of our team, you'll play a critical role in driving Net Revenue Retention, retaining customers, and uncovering opportunities for upsell and expansion.

The Role

As our Customer Success Manager, you'll own a book of business worth ~£1.5–2M, balancing proactive, tech-driven engagement with in-person relationship building when it counts. Your North Star will be Net Revenue Retention, and you'll be responsible for:

• Owning commercial outcomes across your portfolio, driving Net Revenue Retention by retaining customers, mitigating risk, and proactively leading upsell and expansion opportunities
• Building and managing stakeholder relationships across accounts, ensuring high sentiment and advocacy that support renewal and growth
• Partnering with clients to define success metrics and create tailored success plans aligned with their business goals
• Confidently leading upsell/expansion conversations, shaping opportunities, and building business cases to close incremental revenue
• Acting as the voice of the customer internally, providing insights and feedback to Sales, Product, Engineering, and Support
• Tracking and analyzing customer health metrics, turning insights into action to reduce risk and maximize growth
• Balancing strategic planning with day-to-day problem-solving, staying close to customer challenges and opportunities

The Tech Stack

You'll be working with a range of cutting-edge tools, including:

• Google Workplace
• Notion
• Slack
• Zoom
• Hubspot
• Intercom
• Linear
• Guru

About You

We're looking for a seasoned Customer Success Manager with:

• 3+ years of experience in Customer Success, with a proven track record of driving renewals, upsell, and expansion in B2B SaaS (ideally managing a >£1M portfolio)
• Strong preference for experience in an early-stage startup or high-growth SaaS environment
• Commercially sharp, comfortable building business cases, and shaping opportunities
• Entrepreneurial mindset, proactive, creative, and comfortable in a fast-changing startup environment
• High ownership, you run your portfolio like it's your own business and bring forward ideas, not just problems
• Calm under pressure and skilled at juggling multiple accounts at different lifecycle stages
• Data-driven, you analyze customer health metrics, spot trends, and turn insights into strategy
• Background in HR tech / recruiting tech OR direct recruiting experience (agency or in-house) is a plus
• Based in the UK with work authorization and the ability to travel up to 20% of the time for on-site client visits

What We Offer

At arenaflex, we're committed to creating a work environment that's supportive, inclusive, and exciting. Here's what you can expect:

Gold-plated healthcare

– The best medical, dental, and optical coverage money can buy. We've got you (and your family) covered

Unlimited holidays

– Work-life balance matters. Take the time you need to rest, recharge, and enjoy life

Mental health support

– Unlimited, immediate access to professional counseling through Spill—because your well-being comes first

Retirement matching

– A competitive plan to help you hit your long-term financial goals

Remote-first culture

– Work where you're most productive. As a remote-first team, we prioritize flexibility and trust

Meaningful equity

– You're helping build something special, and you should share in its success

Generous parental leave

– Up to 16 weeks of fully paid leave to support new parents

Learning budget

– Annual funds for courses, books, or anything else that fuels your personal and professional growth

Top-of-the-line equipment

– MacBook Pro, 4K monitors, and all the right tools to do your best work

A team that's got your back

– Smart, driven, kind people who want you to succeed, our clients to be wowed, and our business to grow

How to Apply

If you're a seasoned Customer Success Manager with a passion for driving Net Revenue Retention and customer delight, we'd love to hear from you. Please submit your application, including your resume and a cover letter, to [insert contact information]. Apply for this job