Software Engineer (Contractor)

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

Full stack Product Development

• Design, develop, and maintain scalable and robust features ensuring seamless integration between front‑end and back‑end systems
• Ensure high performance, reliability and scalability across our distributed systems
• Contribute to systems powering AI‑assistants, developer experience, authentication, billing, AI tooling, observability, connectors, search and more

Creative & Brand Web Development

• Build and maintain our websites. Using modern frontend frameworks like React, Next.js, Svelte and Astro, you’ll develop responsive, accessible pages and reusable components
• Create interactive experiences. Bring our brand to life with animations and micro‑interactions that delight users while ensuring strong performance and accessibility
• Collaborate across disciplines. Work closely with designers, marketers and developers to launch high‑impact pages, campaigns and microsites

AI Engineering

• Design and run evaluations for your product area: reference tests, heuristics, model‑graded checks tailored to search relevance, chat quality, document understanding, or audio performance
• Define and track metrics that matter: task success, helpfulness, hallucination proxies, safety flags, latency, cost
• Improve core behaviors in your product area, whether that’s memory policies, intent classification, routing, tool‑call reliability, or retrieval quality

Data Engineering

• Design, build, and maintain scalable data pipelines, ETL processes, and analytics infrastructure. Automate data quality checks and validation processes
• Collaborate with cross‑functional teams to understand data needs and deliver high‑quality, actionable solutions, eg work closely with machine learning teams to support model training, deployment pipelines, and feature stores
• Optimize data storage, retrieval, processing, and queries for performance, scalability, and cost‑efficiency

Development Operations

• Build, monitor, and enhance CI/CD pipelines to streamline development workflows and accelerate deployments
• Design, operate and maintain scalable, reliable and secure multi‑cloud infrastructures
• Identify areas for improvement and create innovative solutions that enable high developer velocity

You can find more details about our open contractor roles >> here

About You

• Degree in Computer Science, Software Engineering, or equivalent practical experience
• Proficiency in one of the following languages: Python, TypeScript, Golang
• Strong problem‑solving abilities and attention to detail
• Ownership mindset capable of shipping end‑to‑end features with minimal oversight
• Excellent communication skills and collaborative attitude
• Team‑oriented, low‑ego mindset and curiosity for learning

Fast‑Track Hiring Process

• Intro call with a recruiter — 15 min
• Technical rounds — usually 2 x 45 min depends on the role
• Interview with a technical lead — 30 min

Our Culture

• Reason with rigor
• Are you audacious enough?
• Make our customers succeed
• Ship early and accelerate
• Leave your ego aside

Engineering blog

Our first Engineering blog post is live, you can check it out here !

Artificial intelligence tools

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.