Senior Customer Success Manager

About the role

At Fyxer we are building a high‑leverage commercial motion that turns customer relationships into revenue. As a Senior Customer Success Manager you will work with our largest and most complex enterprise accounts, driving renewals, identifying expansion opportunities and converting usage into measurable value. You will help shape the Customer Success function from the ground up while delivering tangible results for both customers and the business.

Key responsibilities

• Drive retention and expansion across strategic accounts, owning the full renewal cycle.
• Manage a portfolio of high‑potential, high‑complexity enterprise customers.
• Multithread across stakeholders to embed deep relationships and surface commercial opportunities.
• Develop scalable, repeatable playbooks for success, renewal and expansion.
• Help shape the GTM tech stack, selecting and implementing tools that support success at scale.
• Define and refine KPIs and dashboards to track customer health and growth.
• Partner with product, sales and leadership to translate customer insights into roadmap influence.
• Collaborate on account planning and ensure smooth handoffs from pre‑ to post‑sales.

Required profile

• 8+ years of experience in Customer Success or Account Management with a proven record of revenue ownership (renewals and expansion).
• Enterprise experience navigating complex organisations, long sales cycles and strategic conversations.
• Commercially driven mindset, comfortable discussing numbers and pursuing upsell opportunities.
• Builder mentality – thrives in ambiguity and enjoys defining a motion from scratch.
• Excellent communicator able to lead executive conversations and translate technical concepts.
• Tool‑savvy with modern GTM platforms and the ability to evaluate and implement the right solutions.
• Startup‑ready attitude – fast, flexible and energized by rapid change.

What we offer

• Hybrid work model based in our London office (remote work not available).
• Salary range £70,000 – £90,000 per year plus bonus, equity and additional benefits.
• Opportunity to build and own the Customer Success function in a fast‑growing AI company.