Back End Developer

Backend Engineer – Real-Time & AI Systems

📍 Paris (South of Paris / Île-de-France)

📝 Permanent, CDI

💶 Salary based on experience

French or European Citizenship required

Do you want to build backend software where real-time behaviour, performance, and AI-powered features are critical to the product?

This opportunity is with a European technology company that designs and manufactures high-end professional hardware systems combining real-time processing, networking, and intuitive control interfaces.

Their products are used worldwide in demanding environments such as live events, broadcast, corporate presentation, and control rooms, where reliability and responsiveness are critical.

What you will do:

• Design and develop backend services using modern web technologies (Node.js / TypeScript)
• Build and maintain real-time communication and synchronisation layers (WebSockets, event-driven architectures)
• Integrate AI capabilities directly into backend systems (LLMs, AI-powered features, automation workflows)
• Work on systems where performance, concurrency, and robustness are critical
• Ensure software quality through code reviews, automated testing, and CI/CD pipelines
• Contribute to architectural decisions and continuous improvement of development practices

Key skills required:

• Strong experience as a backend developer (Node.js, TypeScript)
• Experience with real-time client/server systems (WebSockets, event-driven or streaming architectures)
• Hands-on experience integrating AI/LLMs into products or backend systems (e.g. OpenAI, RAG, embeddings, AI-powered features)
• Good understanding of performance, concurrency, and system optimisation
• Experience working with messaging systems (Kafka, Redis, RabbitMQ or similar) is a plus

If you are interested in this position, please reach out and apply to find out more!

Do you know someone who could be a great fit? Refer a candidate and earn up to £250, with an additional £250 donated to a charity of your choice. 5V Tech is acting as an Employment Agency for this vacancy. We specialise in talent solutions.