Software Engineer, QA

About Mistral
At Mistral AI, we believe in the power of AI to simplify tasks, save time, and enhance learning and creativity. Our technology is designed to integrate seamlessly into daily working life.

We democratize AI through high-performance, optimized, open-source and cutting-edge models, products and solutions. Our comprehensive AI platform is designed to meet enterprise needs, whether on-premises or in cloud environments. Our offerings include le Chat, the AI assistant for life and work.

We are a dynamic, collaborative team passionate about AI and its potential to transform society. Our diverse workforce thrives in competitive environments and is committed to driving innovation. Our teams are distributed between France, USA, UK, Germany and Singapore. We are creative, low-ego and team-spirited.

Join us to be part of a pioneering company shaping the future of AI. Together, we can make a meaningful impact. See more about our culture on

Role Summary
We are seeking a skilled and proactive QA Engineer to join our team and ensure the reliability, accuracy, and robustness of our AI-powered products. In this role, you will design and execute test strategies for our applications, APIs and machine learning models. Your work will involve automated testing, edge-case analysis, and collaboration with cross-functional teams to deliver seamless, high-quality user experiences. If you thrive in a dynamic environment and are passionate about quality in AI systems, this is a perfect opportunity to make a tangible impact.

What you will do

Test Automation: Develop automated test suites to validate app features, APIs, and model integrations, ensuring end-to-end reliability and user experience.

Edge Case Analysis: Collaborate with PMs and other stakeholders to identify and rigorously test edge cases, improving the robustness of both platform features and models.

Quality Platform Development: Contribute to building tools and frameworks that enable more efficient and scalable quality testing processes across the organization.

Release Readiness Validation: Implement pre-release quality gates to validate models, APIs, and platform updates, providing a green light for production releases.

Systematic QA Campaigns: Design and lead comprehensive quality assurance campaigns, including functional, stress, and performance testing, to proactively identify potential issues.

About You

• You have proven ability to create and execute comprehensive test strategies, covering functional, regression, and exploratory testing for AI products
• You are proficient in QA tools like Playwright, Postman, or similar platforms for API and functional testing
• You're skilled in identifying, documenting, and collaborating with developers to resolve issues efficiently
• You are autonomous and a self-starter
• You are a proactive problem-solver with a continuous improvement mindset
• You are proficient in Python or Typescript

Now it would be ideal if you have :

• Experience testing Machine Learning models
• Understanding of the Machine Learning lifecycle
• Experience in various types of testing : performance, load, accessibility or others
• Strong debugging skills

Hiring Process

• Recruiter Screening (45min)
• Hiring Manager Interview (30min)
• Take-home test
• Live-Coding (Scripting) (60min)
• Culture-fit discussion (30min)

Location & Remote

This role is primarily based at one of our European offices (Paris, France and London, UK). We will prioritize candidates who either reside in Paris or are open to relocating. We strongly believe in the value of in-person collaboration to foster strong relationships and seamless communication within our team.

In certain specific situations, we will also consider remote candidates based in one of the countries listed in this job posting — currently France, UK, Germany, Belgium, Netherlands, Spain and Italy. In that case, we ask all new hires to visit our Paris office:

• for the first week of their onboarding (accommodation and travelling covered)
• then at least 3 days per month

What we offer

Competitive salary and equity

Health insurance

Transportation allowance

Sport allowance

Meal vouchers

Private pension plan

Parental : Generous parental leave policy

Visa sponsorship

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.