Customer Success Manager_Japan

The Role

As a Customer Success Manager at Genspark, you'll own the post-sales relationship end to end, making sure the customer sees real, measurable business outcomes from day one. This is a hands-on role: you'll lead deployments, build joint success plans, run EBRs, and be the person customers call when they need a trusted advisor who understands both their business and the platform.

You'll report to the Head of Customer Success and work daily with Account Executives, Solutions Engineers, and Product - sitting at the intersection of revenue, adoption, and long-term customer health.

At a company growing from $0 to $250M+ ARR in 12 months with 6,000+ enterprise clients globally, this isn't a maintenance role. You have the opportunity to directly impact the company's playbook from the very beginning.

What You'll Do

Customer Deployment & Onboarding:

• Serve as the primary post-sales point of contact from signed contract through go-live and beyond
• Lead new customer deployments end to end - including hands-on guidance for SSO setup, connector configuration, and platform onboarding
• Own clarity on expectations, timeline, and deliverables for all stakeholders throughout the implementation lifecycle
• Develop and execute tailored onboarding plans; facilitate cross-functional collaboration across sales, solutions engineering, support, and product

Customer Success & Expansion:

• Build and execute joint success plans and EBRs that drive adoption, deepen engagement, and tie platform usage to measurable business outcomes
• Monitor customer health, adoption metrics, and satisfaction signals - proactively identifying risks and driving resolution before they escalate
• Partner with Account Executives on renewal and expansion conversations, bringing customer context and success data to the table
• Guide customers on Genspark best practices, new features, and emerging use cases relevant to their business

Internal Contribution:

• Document and improve onboarding processes, playbooks, and best practices as the CS motion scales
• Provide actionable product feedback from the field to influence roadmap and support quality
• Contribute to internal initiatives that raise the bar on how we deliver customer value at scale

What We're Looking For

• 3-5 years of experience in customer success, implementation management, or technical account management for enterprise SaaS customers
• Proven ability to manage complex, multi-stakeholder enterprise engagements from kickoff through renewal
• Strong project management and organizational skills - you can run multiple deployments simultaneously without dropping threads
• Excellent communication and executive presence - comfortable leading EBRs with C-suite and diving into the details with administrators the same week
• Solutions-oriented and comfortable with ambiguity; you thrive in fast-moving environments where the playbook is still being written
• Experience with SSO, identity providers (Entra ID, Okta, Google), and enterprise connector/integration workflows is a plus
• Background in AI, productivity, or knowledge work SaaS is a plus
• Native-level Japanese and fluent English. English fluency is a must; you will work daily with global leadership.

About Genspark

Genspark is one of the fastest-growing AI companies in the world - $0 to $250M+ ARR in 12 months with a team of ~70. We're building the AI execution layer for knowledge work, serving 6,000+ business clients globally across financial services, advertising, hospitality, technology, and consulting. Backed by Emergence Capital, Temasek, SBI, LG Technology Ventures, and others, with $645M raised in total and a valuation of $2.6B. Forbes AI 50 (2026). Partnerships with Microsoft, OpenAI, Anthropic, and AWS.

We're scaling our enterprise go-to-market from 7 AEs to 55+ across the US and Japan through 2026 and expanding into EMEA - which means a rapidly growing customer base, increasingly complex deployments, and a CS function that needs people who can grow with it.

Location: Remote/ Hybrid (We have a Wework office in Tokyo)