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Mistral provides full-stack AI solutions: from frontier models to developer tools, applications, and compute. We partner with enterprises tackling the hardest problems—across high-stakes industries like finance, manufacturing, defense, healthcare, and the public sector—co-creating customized AI systems that they can run on their terms.
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 Europe, North America, Asia and the Middle East. We are creative, low-ego and team-spirited.
As an HR People Ops on the People Operations team, you will be central to shaping and maintaining our HR function across multiple countries. You will ensure new joiners are seamlessly onboarded and that all employee matters—from contracts to compliance—are managed with accuracy and care. Your focus will span day-to-day HR operations, payroll processing, and safeguarding legal compliance in France, the UK, and the US. This is a hands-on position where you work alongside managers, external partners, and multiple internal teams to keep the employee experience running smoothly and efficiently.
You'll be ideally located in London.
Oversee onboarding for new joiners, coordinating HR systems, IT setup, and office arrangements
Formalize and manage all employee contractual documentation and processes throughout the employment lifecycle
Maintain and update HR records, policies, and employee handbooks as regulations and company practices evolve
Process payroll and collaborate with providers to ensure timely and accurate payments in France, the UK, and the US
Handle immigration requests, work permits, and related documentation
Manage day-to-day HR inquiries, employee benefits administration, and time off policies
Ensure adherence to local employment laws, conduct compliance audits, and mitigate organizational risk
Lead process improvements and collaborate with cross-functional partners, including Finance and Talent Acquisition
7-10 years of progressive HR experience, especially managing international employee populations
Strong understanding of employment laws and HR policy, with expertise in French, UK, and US regulations
Direct experience with payroll administration and benefits management across different regions
Ability to resolve employee relations matters, guide teams, and provide accurate HR support
Skilled at streamlining HR processes to improve efficiency and maintain compliance
Proficiency with HRIS and payroll technology platforms
Excellent communication, analytic, and problem-solving abilities
Hands-on approach, high level of ownership, and a builder's mindset
We offer a comprehensive benefits package designed to support your well-being, growth, and work-life balance. Benefits vary by country and may include healthcare coverage, parental leave, retirement plans, relocation support, wellness programs, meal and transportation allowances, and other location-specific perks.
For the most up-to-date details on benefits available in your location, please refer to our Benefits page.
Your privacy matters to us. You can learn more about how we handle your personal data in our Applicant Privacy Policy.