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. The Programmable Communications Team is responsible for all technology aspects related to the voice and messaging infrastructure of Aircall products. The team works to deliver high‑quality and real‑time communications to our users while operating in all areas at carrier‑grade expectations (stability, maintainability, scaling, and uptime). Our shared ambition is to provide the best voice and messaging infrastructure for Aircall customers and help other Aircall engineering teams deliver as much value as possible on top of it.
Design and build highly scalable and secure backend services, ensuring high availability, performance, and security to support high‑volume workloads




Design and maintain robust CI pipelines (GitLab CI), release workflows, and automated testing to implement continuous delivery best practices in production environments
Debug and optimize the application’s performance, focusing on memory leaks and CPU usage in a desktop environment, critical for maintaining a high audio quality during calls
Operate, monitor, and optimize distributed systems in AWS production environments
Lead initiatives to improve the reliability, resilience, and performance of our distributed systems, from design through production operation
You have solid experience building backend services with a strong focus on security, scalability, availability, and performance
You have strong knowledge of CI/CD pipelines, infrastructure‑as‑code, automated testing, and deployment best practices
You have hands‑on experience with GitLab CI/CD (or similar), release workflows, code reviews, and continuous delivery in production
You are proficient in working in containerized environments (Docker, Kubernetes)
You have experience operating and optimising systems in AWS production environments, ideally supporting high‑volume, high‑availability workloads
You have exposure to media servers, signalling flows, or real‑time communications debugging
You have strong communication skills and fluency in English (written and spoken)
45+ Nationalities: cosmopolite & multi‑cultural mindset
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📌 ICT Software Developer (Madrid)
🏢 Aircall
📍 Madrid