Backend Software Engineer, Mistral AI
+ Equity Package
3+ days a week in office
Generative AI model developers
Open for applications
Generative AI model developers
101-200 employees
Open for applications
+ Equity Package
3+ days a week in office
101-200 employees
Company mission
To make frontier AI ubiquitous, and to provide tailor-made AI to all the builders.
Role
Who you are
- Degree in Computer Science, Software Engineering, or equivalent practical experience
- Proficiency in Python or another backend language (JavaScript/TypeScript, C#, Golang, Ruby). Engineers are assessed in their preferred language during a live coding session
- Strong understanding of backend fundamentals: APIs, databases, caching, messaging systems and distributed architectures
- 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
- AI/ML engineering
Desirable
- Front-end development (Typescript, React, NextJS...) or full-stack exposure
- Infrastructure management (Docker, CI/CD, Kubernetes, Helm, Terraform...)
- Observability and monitoring tools (Prometheus, Grafana, Datadog…)
- UX and product-centric mindset
What the job involves
- We are seeking passionate and skilled software engineers to join our team. In this role, you will have the unique opportunity to build and develop our core platform (API & DX Console, AI Tooling, Connectors, Observability, User Admin & Billing, Partnerships...) contributing to its development and enhancement
- Your work will directly impact the developer experience, making it more engaging, efficient and intuitive
- Depending on your skills and field of expertise, you will be involved in key components of our technology, including:
- Design, develop and maintain scalable, robust backend features and APIs using modern frameworks
- Ensure high performance and reliability across our distributed systems
- Contribute to systems powering authentication, billing, AI tooling, observability, connectors, and developer experience
- Design and implement efficient, secure and scalable architectures that support our fast-growing products
- Collaborate with infrastructure teams on deployment, monitoring, and performance optimization
- Write clean, maintainable and well-documented code
- Participate in code reviews and contribute to technical standards and best practices
- Work closely with product managers, front-end engineers, designers and data/AI engineers to deliver end-to-end features
- Partner with teams across AI Studio, Le Chat & Mistral Code to ensure consistent platform-wide experience
- Tackle complex engineering challenges, from distributed systems to AI product integration
- Stay up-to-date with new technologies (e.g., AI/LLM integration, observability, or backend frameworks) and bring them into production when relevant
Application process
- Introduction call - 45 min
- Hiring Manager interview - 30 min
- Live-coding interview (Python) - 35 min
- Optional : System Design interview - 45 min
- Optional : Deep Dive Interview - 60 min
- Culture-fit discussion - 30 min
- Reference checks
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.
With the upcoming release of Mixtral in 2024, featuring up to 176 billion parameters, Mistral is under pressure to deliver. Mixtral's open-source nature has sparked concerns about potential misuse, yet Mistral remains a formidable competitor in the AI landscape, challenging models from Google and Meta.
Recently, Mistral secured a massive $640 million funding round, raising its valuation to $6 billion. This Series A funding, led by General Catalyst and including investors like Lightspeed Venture Partners and Andreessen Horowitz, underscores significant interest in alternatives to ChatGPT.
Freddie
Company Specialist at Welcome to the Jungle
Company
Funding (last 2 of 5 rounds)
Sep 2025
$2.0bn
SERIES C
Jun 2024
$542.5m
SERIES B
Total funding: $3.1bn
Company benefits
- Competitive bonus structure
- Equity
- Opportunities for professional growth and development
Company HQ
Villette, Paris, France
Leadership
Timothee Lacroix
(CTO)Previously PhD and Software Engineer Intern at Facebook and Visiting Undergraduate at CAlab UCSD
Guillaume Lample
(Chief Scientist)Research Student and Scientist at Facebook AI and Research Intern at Jane Street Capital
Arthur Mensch
(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
Salary benchmarks
We don't have enough data yet to provide salary benchmarks for this role.
Submit your salary to help other candidates with crowdsourced salary estimates.
Share this job
View 77 more jobs at Mistral AI