Software Engineer, Knowledge and Search

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 talented and experienced software engineer to join our Knowledge and Search engineering team. You will be responsible for designing, implementing and scaling our search capabilities supporting the needs of our users and internal systems.
Reporting line : VP of Engineering Location : Paris (France) or London (UK)
What you will do
Key Responsibilities 
The Knowledge & Search team is the backbone that connects our customers to the information they need. We are looking for an experienced software engineer to lead our indexing and searching capabilities. In this role, you will work closely with our data and infrastructure teams to build, maintain and scale our search platform while ensuring a high-level of performance and reliability.
Your responsibilities include (but may not be limited to):
• Building, maintaining and enhancing a fast, reliable and scalable indexing and searching capabilities (web and knowledge)
• Working with search-oriented databases to optimise and fine-tune full search pipelines from document ingestion to retrieval
• Owning our information retrieval systems serving both our internal needs as well as our enterprise customers
• Ensuring that our search capabilities meet the increasing demands of our customers
• Collaborate with internal and external stakeholders to push the boundaries of search reliability, performance, and scale across a range and cloud-native and on-premise services.
About you

• 7+ years of relevant professional work experience
• Master's degree in Computer Science, Information Technology or a related field
• Experience building and scaling distributed search engine systems
• Excellent proficiency in backend software development (Python, Go, C++, Rust...)
• Solid proficiency in infrastructure management (Docker, CI/CD, Helm, K8s, Terraform...)
• Good knowledge of cloud-native ecosystems
• Autonomous and self-starter
• Ability to communicate with influence
Now, it would be ideal if you had experience with:
• AI/ML engineering

Hiring Process
Here is what you should expect:
• Introduction call - 30 min
• Hiring Manager Interview - 30 min
• Live-coding Interview (Python) - 45 min
• System Design Interview - 45 min
• Optional: Deep Dive Interview (Staff/Lead specific) - 60 min
• Culture-fit discussion - 30 min
• References 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 there 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. In that case, we ask all new hires to visit our local 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.

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