Software Engineer, Backend (New-York)

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. about our culture on https://mistral.ai/careers.

Role Summary

We are seeking passionate and skilled software engineers to join our new team in NYC. As a Backend Engineer, you’ll contribute to the development of the core systems powering our three main products, AI Studio, Le Chat & Mistral Code, shaping how users and developers interact with our AI platform at scale. You’ll work on building reliable, high-performance backend systems and APIs that serve millions of users and developers. Your work will directly impact the developer and user experience, making it more engaging, efficient, and intuitive. We welcome engineers from mid-level to senior and staff engineers who are eager to learn, collaborate and ship impactful products.

What You Will Do

Depending on your skills and field of expertise, you will be involved in key components of our technology, including:

Backend Development

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 inference, billing, AI tooling, observability, and developer experience

System Architecture

Design and implement efficient, secure and scalable architectures that support our fast-growing products

Collaborate with infrastructure teams on deployment, monitoring, and performance optimization

Code Quality

Write clean, maintainable and well-documented code

Participate in code reviews and contribute to technical standards and best practices

Cross-functional Collaboration

Collaborate with product managers, platform engineers, and AI/ML teams to design, build, and deliver scalable model-as-a-service solutions for developers and enterprise users

Partner with teams across AI Studio, Le Chat & Mistral Code to ensure consistent platform-wide experience

Problem-Solving & Innovation

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

Who You Are

Degree in Computer Science, Software Engineering, or equivalent practical experience

Proficiency in Python or another backend language (Golang, Kotlin, C#). 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

Now, it would be ideal if you had experience with:

Full-stack exposure

Working closely with an API & developer ecosystem

Deploying software to a diverse set of environments (cloud, on-premises, etc.)

Infrastructure management (Docker, CI/CD, Kubernetes, Helm, Terraform...)

AI/ML engineering

Observability and monitoring tools (Prometheus, Grafana, Datadog…)

UX and product-centric mindset

Hiring Process

Introduction call - 30 min

Live-coding interview - 45 min

Hiring Manager interview - 30 min

Deep Dive Interview (only for leads & staff engineers) - 60 min

Culture-fit discussion - 30 min

Reference checks

Our Culture

We're driven to build a strong company culture and are looking for individuals with solid alignment with the following:

Reason with rigor

Are you audacious enough?

Make our customers succeed

Ship early and accelerate

Leave your ego aside

Location & Work Policy

This role is based in our NYC office, and we’re currently considering candidates who either already live in the area or are open to relocating. We strongly believe in the value of in-person collaboration and we encourage going to the office as much as we can (at least 3 days per week) to create bonds and smooth communication. Our remote policy aims to provide flexibility, improve work-life balance and increase productivity.

What We Offer

💰 Competitive salary and equity

🚑 Healthcare: Medical/Dental/Vision covered for you and your family

👴🏻 401K : 6% matching

🏝️ PTO : 18 days

🚗 Transportation: Reimburse office parking charges, or $120/month for public transport

🏀 Sport: $120/month reimbursement for gym membership

🥕 Meal stipend: $400 monthly allowance for meals

🌎 Visa sponsorship

🤝 Coaching: we offer BetterUp coaching on a voluntary basis

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