Senior Customer Success Manager (UK)

About 11x Most of what salespeople do all day isn't selling. It's research, list-building, follow-ups, and data entry — work that should never have been a human job in the first place. We're building the autonomous workforce that will run revenue. Not a tool, but a system of AI workers that own GTM execution end-to-end. Alice creates demand, and Julian captures it. They take the busywork off the table so GTM teams can can do what they do best: building relationships and closing deals. Backed by $75M+ from a16z and Benchmark, headquartered in San Francisco, and trusted by Checkr, Xerox, Sage, and Armanino. We're hiring ambitious people who want to define how the next generation of companies accelerate growth. About the Role We’re looking for a Customer Success Manager who is energized by the challenge of scaling new go-to-market motions and driving business impact across a portfolio of high-value customers. At 11x, we call this a Full Stack CSM—you’ll own the entire customer journey: from onboarding and consulting on use cases, to managing ongoing success and even leading commercial conversations. You won’t just manage accounts—you’ll serve as a strategic advisor to executive stakeholders, deeply embed yourself in customer workflows, and proactively identify opportunities to expand adoption and value. Ideal candidates have hands-on GTM experience—whether through sales, partnerships, business development, or supporting go-to-market tools—and are passionate about building long-term relationships that lead to outsized outcomes. What You’ll Do Act as a trusted advisor to C-level and VP stakeholders, aligning our digital workers to their strategic goals and success metrics Drive adoption, onboarding, and expansion across teams by surfacing new use cases, leading training sessions, and articulating impact Own and grow your book of business, with a strong focus on renewals, upsell, and product stickiness Partner cross-functionally with product, engineering, and GTM teams to shape roadmap, resolve friction, and co-create scalable success Contribute to the broader customer ecosystem—developing playbooks, leading community events, and sharing insights Requirements 5+ years in a customer-facing role (Customer Success, Account Management, Business Development, etc.)—preferably in SaaS, AI, or GTM tech A strong understanding of the go-to-market landscape—you’ve either carried a quota, supported sales teams, or helped deploy tools used by GTM orgs A builder’s mindset: proactive, resourceful, and unafraid to get hands-on in a fast-moving environment Exceptional communicator and relationship-builder, comfortable engaging senior execs and managing complex projects You sweat the details, thrive on ownership, and are motivated by helping customers win Onsite in our London office three days a week—this role is highly collaborative and benefits from being in the room