Software Engineer Internship, Mistral AI
Generative AI model developers
Job no longer available
Generative AI model developers
501-1000 employees
Job no longer available
501-1000 employees
Company mission
To make frontier AI ubiquitous, and to provide tailor-made AI to all the builders.
Role
Who you are
- Excellent skills in full-stack development (Python/Typescript/Javascript)
- Strong ability to create smooth and high quality user experiences, for both developer facing and end-user facing products
- Appetite and experience in front-end development, with mastery of one framework such as ReactJS, Svelte, Vue.js, HTMX, …
- Strong ability in Python back-end development and clean code implementations
- Appetite for constructing AI-based solutions, based on e.g. chat APIs, embedding APIs, etc,
- The successful candidate can adapt to new technologies very quickly, and can evolve in a quickly changing developing environment
What the job involves
- Regarding the project, here are some examples of what you can do according to your preferences and interests:
- Chat Application: Create a chat app using Next.js with our public API
- Python Project: Develop a project in Python using vLLM or a similar technology
- Flexible Topic: Choose a topic using Python with FastAPI or Next.js with TypeScript that incorporates our SDK
- We will pay particular attention to best practices:
- Include a detailed README for setup and usage
- Ensure the project is easy to test
- We advise you to work at least one hour on the project
- You will be working in our engineering team and will learn the specifics of AI software, to build internal and external tooling
- Internship duration: 3 to 6 months. We will prioritize candidates who can join us full time after a successful internship
- Develop user-facing internal and external applications using Mistral AI models for the various purposes enabled by LLM (chatbot, search engines, document answering, …)
- Instrument Mistral AI products with developer-facing tools (e.g. dashboards, evaluation interfaces, …)
Application process
- Step 0: Submit your GitHub and project
- Step 1: Coding Interview
- Step 2: System Design Interview
- Step 3: Interview with our Engineering Team Lead
Our take
Founded by Facebook AI researchers, Mistral AI focuses on developing open-source generative AI models to "make AI useful." It emerged in early 2023, quickly achieving a $260 million valuation.
Mistral features up to 176 billion parameters, and its open-source nature has sparked concerns about potential misuse. However, Mistral remains a formidable competitor in the AI landscape, challenging models from Google and Meta.
In 2025, Mistral secured a massive €1.7 billion funding round, raising its valuation to €11.7 billion. This Series B funding, led by European chip firm ASML, underscores significant interest in alternatives to ChatGPT and a push away from Silicon Valley dependence by European AI competitors.
Freddie
Company Specialist at Welcome to the Jungle
Company
Funding (last 2 of 5 rounds)
Sep 2025
$2.0bn
SERIES C
Jun 2024
$552.3m
SERIES B
Total funding: $3.2bn
Company benefits
- Competitive bonus structure
- Equity
- Opportunities for professional growth and development
Company HQ
Villette, Paris, France
Leadership
Timothee Lacroix
(Co-Founder & CTO)Previously PhD and Software Engineer Intern at Facebook and Visiting Undergraduate at CAlab UCSD
Guillaume Lample
(Co-Founder & Chief Scientist)Research Student and Scientist at Facebook AI and Research Intern at Jane Street Capital
Arthur Mensch
(Co-Founder & CEO)Previously Staff Research Scientist at DeepMind, Post-doc researcher at École normale supérieure, Visiting Researcher at NYU Courant Institute of Mathematical Sciences and PhD Student at Inria
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