Senior Customer Success Manager - AI‑Driven, API‑First

Gladia; Paris; Hybrid; EUR 50,000 - 75,000; Full time

Benefits offered by this job

Hybrid Paris Office

Lunch vouchers

Sports allowance

Workstation stipend

Health insurance

Pension

Flexible vacation

Job summary

Gladia is seeking a Senior Customer Success Manager to own relationships with our most strategic customers, guiding onboarding, adoption, and long-term value. You will work closely with Sales, Support, Product, and Engineering to ensure successful outcomes in a fast-paced API-first environment.

You should be fluent in English and French, with 4–7+ years in customer success or technical account management, and a proven ability to reduce churn, articulate ROI, and build trusted partnerships that

Qualifications

• 4–7+ years in Customer Success or Technical Account Management.
• Experience with API-first or developer-facing products.
• Excellent communication with developers, product teams, and executives.

Responsibilities

• Own end-to-end onboarding, training, and activation for strategic accounts.
• Lead regular business reviews to demonstrate value and retention.
• Collaborate with Sales, Support, Product, and Engineering to align on outcomes.
• Monitor usage, detect churn signals, and drive adoption with customers.

Skills

Customer Success

API-first experience

Excellent communication

English/French fluency

Strategic account management

Job description

Gladia is seeking a Senior Customer Success Manager to own relationships with our most strategic customers, guiding onboarding, adoption, and long-term value. You will work closely with Sales, Support, Product, and Engineering to ensure successful outcomes in a fast-paced API-first environment.

You should be fluent in English and French, with 4–7+ years in customer success or technical account management, and a proven ability to reduce churn, articulate ROI, and build trusted partnerships that