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. We're looking for a strong Senior Python Engineer who's eager to go beyond traditional backend development. You're energized by hard technical problems—distributed systems, AI orchestration, architectural trade-offs, performance, and scalability. It's an opportunity to help build the intelligence layer behind a next-generation autonomous Sales OS. Design and implement production-grade Python services with clean architecture and strong engineering discipline. Integrate with external SaaS systems (CRMs, dialers, meeting tools, OAuth providers).



Optimize performance, latency, cost, and reliability of AI-driven systems. Build and orchestrate LLM-powered agents (planning, reasoning, tool usage, memory). Use AI coding assistants effectively and experiment with AI-augmented development workflows. 7+ years of strong backend engineering experience. ~ Advanced Python expertise (async, typing, architecture patterns, testing) ~ You design thoughtful, well-architected systems and write clean, high-quality code, with a focus on performance and long-term maintainability. ~ Experience with GCP (preferred) or AWS. ~ You actively leverage AI coding assistants and are driven to push the boundaries of AI-augmented engineering. ~ You thrive in fast-paced startup environments where ownership is real and impact is immediate. ~ Fluency in English is required; Spanish is a plus. Backend: Python, FastAPI, Celery, PostgreSQL, uv (package-manager) Frontend: NextJS, Tailwind DevOps: Google Cloud, Kubernetes 45+ Nationalities: cosmopolite & multi-cultural mindset ~ We're committed to ensuring that everyone not only has a seat at the table but is valued and respected at it by providing equal opportunities to develop and thrive. If you would like more information about how your data is processed, please contact us. #

📌 Senior Backend Software Engineer (Comunidad de Madrid)
🏢 Aircall
📍 Comunidad de Madrid