Aircall is a unicorn, AI-powered customer communications platform used by 22,000+ companies worldwide to drive revenue, resolve issues faster, and scale customer‑facing teams. We’re redefining customer communications by bringing voice, SMS, WhatsApp, and AI together into one seamless workspace.
Aircall is headquartered in Paris, our European HQ, with a strong North American presence anchored in Seattle, our North American HQ, and teams across Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City. We’ve built a product customers love and a business that’s scaling quickly, backed by world‑class investors and driven by rapid AI innovation across multiple product lines.
At Aircall, you’ll join a company in motion. We’re customer‑obsessed, data‑driven, and focused on delivering meaningful outcomes. As a Senior Backend & AI Engineer, you will be responsible for the design, development, deployment, and operation of business‑critical AI features. Quality, excellence, and agility drive our delivery processes and you will help us level these up.



You will be building practical applications such as chatbots, virtual assistants, automated content generation, and other NLP‑powered tools. You will use and fine‑tune existing LLMs to cater to specific business needs and domains, ensuring high performance in real‑world applications.
Collaborate on requirements analysis to design the right technical and business solutions for our customers.
Write clean, scalable, and maintainable code while ensuring proper testing, deployment, and monitoring.
Continuously improve code quality through regular refactoring, debugging, and performance enhancements.
Contribute to building secure, high‑quality AI solutions that power Aircall’s customer experience.
Optimize product and platform performance and ensure reliability through live site monitoring.
LangChain, LlamaIndex, AutoGen) and modern AI architectures such as RAG, vector databases, reranking, and performance optimizati

📌 (Senior) Software Engineer (Madrid)
🏢 Dormont Manufacturing
📍 Madrid