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- Tasks: Join us to develop high-performance backend systems and APIs for our innovative AI products.
- Company: Mistral AI, a pioneering tech company transforming society with cutting-edge AI solutions.
- Benefits: Enjoy competitive salary, equity, health insurance, and flexible remote work options.
- Why this job: Make a real impact on user experiences while working with a dynamic, collaborative team.
- Qualifications: Degree in Computer Science or equivalent, with proficiency in Python or other backend languages.
- Other info: Great career growth opportunities in a supportive, low-ego environment.
The predicted salary is between 36000 - 60000 £ per year.
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.
Role summary
We are seeking passionate and skilled software engineers to join our team. 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 at all levels from fresh graduates to senior and staff engineers who are eager to learn, collaborate and ship impactful products.
What you will do
- 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 authentication, billing, AI tooling, observability, connectors, 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: 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.
- 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.
About you
- Degree in Computer Science, Software Engineering, or equivalent practical experience.
- Proficiency in Python or another backend language (JavaScript/TypeScript, C#, Golang). 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:
- Front-end development (TypeScript, React, NextJS...) or full-stack exposure.
- 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 - 45 min
- Live-coding interview - 45 min
- System Design 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
- Reason with rigor
- Are you audacious enough?
- Make our customers succeed
- Ship early and accelerate
- Leave your ego aside
Location & Remote
The position is based in our London office 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. Each manager can decide the amount of days worked remotely based on autonomy and a specific context (e.g. more flexibility can occur during summer). In any case, employees are expected to maintain regular communication with their teams and be available during core working hours.
What we offer
- Competitive salary and equity (stock-options)
- Health insurance
- Transportation allowance
- Sport allowance
- Meal vouchers
- Private pension plan
- Generous parental leave policy
- Visa sponsorship
Software Engineer, Backend (London) employer: Mistral AI
Contact Detail:
Mistral AI Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Software Engineer, Backend (London)
✨Tip Number 1
Get your networking game on! Connect with folks in the industry, attend meetups, and join online communities. The more people you know, the better your chances of landing that dream job at Mistral AI.
✨Tip Number 2
Prepare for those interviews like a pro! Brush up on your coding skills, especially in Python or your preferred backend language. Practice live coding sessions and system design scenarios to show off your problem-solving chops.
✨Tip Number 3
Show your passion for AI and innovation during interviews. Share your thoughts on recent trends, and don’t hesitate to discuss any personal projects or contributions to open-source. It’ll make you stand out as a candidate who’s genuinely interested in the field.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets noticed. Plus, it shows you’re serious about joining our dynamic team at Mistral AI. Let’s shape the future of AI together!
We think you need these skills to ace Software Engineer, Backend (London)
Some tips for your application 🫡
Tailor Your CV: Make sure your CV is tailored to the role of Backend Engineer. Highlight your experience with backend languages like Python, and showcase any relevant projects that demonstrate your skills in building scalable systems.
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to express your passion for AI and how your background aligns with Mistral's mission. Don’t forget to mention specific technologies or frameworks you’ve worked with that are relevant to the job.
Showcase Your Problem-Solving Skills: In your application, include examples of complex engineering challenges you've tackled. This will show us your problem-solving abilities and how you approach technical issues, which is key for the role.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way to ensure your application gets into the right hands and shows us you’re serious about joining our team!
How to prepare for a job interview at Mistral AI
✨Know Your Tech Stack
Make sure you’re well-versed in the technologies mentioned in the job description, especially Python or any other backend language you're comfortable with. Brush up on your knowledge of APIs, databases, and distributed systems, as these will likely come up during technical discussions.
✨Prepare for Live Coding
Since there’s a live coding session, practice coding problems that focus on backend development. Use platforms like LeetCode or HackerRank to simulate the interview environment. Focus on writing clean, maintainable code, as this is crucial for demonstrating your skills.
✨Understand System Design
Familiarise yourself with system architecture principles. Be ready to discuss how you would design scalable and secure systems. Think about real-world applications and be prepared to explain your thought process clearly during the system design interview.
✨Show Your Collaborative Spirit
Mistral values teamwork, so be prepared to discuss past experiences where you collaborated with cross-functional teams. Highlight your communication skills and how you’ve contributed to a positive team environment, as this aligns with their low-ego, team-spirited culture.
