Full Time/freelance

Software Engineer (Contractor) at Mistral AI

Company Mistral AI
Location Paris
How You'll Work hybrid
Level mid
Sector Technology
Posted Posted on March 10, 2026

Job Description

We are seeking passionate and skilled software engineers to join our team as contractors. As a software engineer at Mistral AI, you will be involved in key components of our technology, including full stack product development, creative and brand web development, AI engineering, and data engineering.

Key Responsibilities

  • 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.
  • Build and maintain our websites using modern frontend frameworks like React, Next.js, Svelte and Astro.
  • Create interactive experiences and bring our brand to life with animations and micro-interactions that delight users while ensuring strong performance and accessibility.
  • 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.
  • 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.

Requirements

  • 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

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