Backend Software Engineer (Core AI)

We're building a next-generation AI tool designed to revolutionize business productivity. Our team of 40 passionate talents spans across France, Spain, and the United States, and our vision is backed by 6 international investment funds.

To accelerate our growth, we're looking for a talented Software Engineer to join our Engineering team and help us build an innovative product that will make a real impact on how thousands of users work every day.

Tasks

You’ll shape our core AI framework and backend, taking full ownership of backend features. You will build scalable, secure and high-performance systems integrating with AI while collaborating closely with product, data and engineering teams.

More specifically, you will:

Build robust backend services for AI systems (RAG, model orchestration, vector databases)

Design scalable APIs integrating LLMs and AI workflows

Ensure security, observability, and performance across our infrastructure

Automate deployment pipelines, monitoring, and testing

Participate in architecture and tech stack decisions

Document and share technical knowledge

Drive continuous improvement of our AI platform with innovative solutions

Requirements

Technical background

5+ years of experience with Node.js + Type

Script stack (Nest

JS/React)

Hands-on experience (or strong familiarity) with AI/ML integration (LLMs, RAG, or similar)

Solid understanding of backend architecture, scalability, and security best practices

Experience with databases, authentication, and cloud platforms

Familiar with CI/CD, Git workflows, and agile methodologies

Bonus: familiarity with other backend programming languages (go, python, ...)

Soft skills

Strong technical communication

Agile mindset focused on product and business value

Ability to document and defend architectural decisions

Balance between code quality and