Senior Enterprise Customer Success Manager

Scaleflex; Lille; Hybrid; EUR 70,000 - 110,000; Full time

Job summary

Scaleflex, an international B2B SaaS company, seeks a Customer Success Manager to own Enterprise and Mid-Market CS for a portfolio of international customers.

As a trusted advisor, you will guide onboarding, adoption, renewals, and expansion, working with executive sponsors and cross-functional teams to ensure measurable value and reduced churn.

The role requires strong stakeholder management, project leadership, and fluency in English and French, with hybrid work in Europe.

Qualifications

• 5+ years in B2B SaaS Customer Success or strategic Account Management with direct ownership of mid-market or enterprise accounts.
• Demonstrated success in onboarding, product adoption, SaaS renewals, churn prevention, and measurable customer outcomes.
• Customer-centric mindset with executive stakeholder management skills and comfort in renewal conversations.
• Solid project management skills: prioritization, stakeholder coordination, and cross-functional delivery.
• Ability to explain technical SaaS products to business and technical audiences.
• Experience with CRM or CS tools such as HubSpot, Salesforce, Gainsight, ChurnZero, or equivalent.

Responsibilities

• Own Enterprise and Mid-Market Customer Success across a portfolio of international B2B SaaS customers.
• Manage the customer lifecycle from onboarding through renewal, delivering measurable value and protecting recurring revenue.
• Lead onboarding and implementation projects with technical teams, aligning scope, milestones and timelines.
• Build executive relationships and monitor health, usage, engagement, and satisfaction; anticipate churn risks and implement recovery plans.
• Oversee renewal discussions within commercial guidelines and identify expansion opportunities in collaboration with Sales.

Skills

Customer success

Strategic account mgmt

Stakeholder management

Project management

SaaS product knowledge

CRM tools

English French fluency

Tools

HubSpot

Salesforce

Gainsight

ChurnZero

Job description

Scaleflex, an international B2B SaaS company, seeks a Customer Success Manager to own Enterprise and Mid-Market CS for a portfolio of international customers.

As a trusted advisor, you will guide onboarding, adoption, renewals, and expansion, working with executive sponsors and cross-functional teams to ensure measurable value and reduced churn.

The role requires strong stakeholder management, project leadership, and fluency in English and French, with hybrid work in Europe.