Customer Support Manager (CSM) – AI SaaS | Hybrid (Paris, Station F)

About

Thunders is an agentic solution for automated testing in natural language.
Founded in January 2025, we’ve already raised $9M to accelerate our mission : making software testing faster, smarter, and effortless.

Our fast-growing team of 25+ people brings together experts in AI, product, and quality engineering to reinvent how testing is done.

Today, testing is still one of the biggest bottlenecks in software delivery. With the rise of AI-generated code, test volumes are exploding — yet testing remains slow, fragile, and often disconnected from what really matters to the business.

Thunders changes the game.
Our solution automatically generates and runs test plans in natural language, powered by specialized agents (UX, performance, accessibility, SEO…).
The result: autonomous, intelligent tests that adapt to your product and keep up with your pace.

👉 Learn more at www.thunders.ai ⚡️

Job Description

As a Customer Success Manager (CSM) at Thunders, you’ll help our customers get the most out of our AI Test Agents.

You’ll guide them from onboarding to full adoption, making sure Thunders becomes an integral part of how they build and ship software. You’ll be the trusted advisor — ensuring every customer sees measurable value, feels supported, and stays excited about what’s next.

This is a hands-on, relationship-driven role for someone who loves helping customers succeed, thrives in a fast-moving environment, and wants to shape how customer success is done in a growing AI company.

Preferred Experience

Key Responsibilities

  • Own the post-sales relationship — from onboarding to renewal.

  • Ensure customers adopt and scale Thunders AI testing across their teams.

  • Turn technical capabilities into clear business value.

  • Lead onboarding, training, and success reviews that drive engagement.

  • Track account health, anticipate risks, and secure renewals.

  • Collaborate with Sales, Product, and Engineering to champion customer needs.

  • Spot and support growth opportunities within existing accounts.

  • Keep customer insights and progress organized in our CRM.

Mandatory Requirements

  • Excellent English and French communication skills (written and spoken).

  • Experience in Customer Success, Account Management, or Implementation within a B2B SaaS company.

  • Curiosity and confidence working with technology, you enjoy learning how things work.

  • Strong relationship-building skills and a genuine passion for helping customers succeed.

  • Highly organized, proactive, and able to manage multiple accounts independently.

  • Comfortable using CRM or success tools to track progress and measure customer outcomes.

Extra Credits

  • Additional languages (German, Arabic, etc.).

  • Familiarity with the SaaS ecosystem or testing/QA solutions.

  • Experience collaborating with technical teams.

  • A passion for AI and automation tools in your everyday work.

Why Join Thunders

  • Direct impact on the growth of a fast-scaling AI startup.

  • Recently raised $9M to accelerate growth.

  • Opportunity to shape the customer experience at a company on the rise.

  • Hybrid work with collaborative in-office days at Station F.

  • Competitive salary + performance bonus + BSPCE stock options.

Additional Information

  • Contract Type: Full-Time
  • Location: Paris
  • Experience: > 3 years
  • Possible partial remote
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