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Posted Jun 3, 2026

Senior Customer Success Manager – Enterprise SaaS Portfolio (£1.5‑2M) – Driving Net Revenue Retention, Upsell & Expansion at careerzynith

Why careerzynith?

At careerzynith we are on a mission to transform the way in‑house recruitment teams attract, hire, and onboard top talent. As a high‑growth HR‑tech startup, we have built a mature, market‑validated product that is already delivering measurable value to some of the world’s most demanding enterprises. Our customers love us because we combine cutting‑edge technology with a human‑first approach to success. If you thrive in fast‑moving SaaS environments, love turning data into action, and want to be part of a company that is reshaping the future of work, this is the role for you.

About the Role

This is a high‑impact, hands‑on position where you will own a strategic book of business valued at approximately £1.5‑2 million. You will be the trusted advisor for a portfolio of 40+ enterprise customers, balancing proactive, tech‑driven engagement with in‑person relationship building when it matters most. Your North Star will be Net Revenue Retention (NRR) – ensuring customers stay, adopt the platform fully, and uncover new opportunities for upsell and expansion.

Key Responsibilities

Tech Stack You’ll Leverage

Google Workspace, Notion, Slack, Zoom, HubSpot, Intercom, Linear, Guru – all the tools you need to stay organized, communicate effectively, and deliver world‑class service.

Who We’re Looking For

Essential Qualifications

Preferred Experience

Core Skills & Competencies

Career Growth & Learning Opportunities

At careerzynith, your career trajectory is limited only by your ambition. As you master your portfolio and consistently exceed NRR targets, you will have clear pathways to senior leadership roles such as Senior Customer Success Manager, Customer Success Lead, or even Head of Customer Success. We invest heavily in continuous learning – you will receive an annual learning budget, access to industry conferences, and mentorship from senior executives who have built successful SaaS businesses from the ground up.

Compensation, Perks & Benefits

While exact figures will be discussed during the interview process, we offer a competitive base salary, performance‑based bonuses tied to NRR, and meaningful equity participation. Our benefits package is designed to support your health, wellbeing, and work‑life balance:

Our Culture & Values

careerzynith’s culture is built on a set of core values that guide everything we do – from product development to customer interactions. We believe in:

When you join careerzynith, you become part of a community that values growth, celebrates diversity, and encourages you to bring your authentic self to work every day.

How to Apply

If you are ready to make a tangible impact on a fast‑growing HR‑tech leader, we want to hear from you. Click the link below to submit your application, and let’s start a conversation about how you can help shape the future of recruitment success at careerzynith.