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Software engineer, Programmable Comms - Madrid presso Aircall

Aircall · Madrid Office, Spagna · Hybrid

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Description

Aircall is a unicorn AI-powered customer communications platform used by 22,000+ companies worldwide to drive revenue, faster resolutions, and scale. We’re redefining what a customer communications platform can be—by combining voice, SMS, WhatsApp, and AI into one seamless workspace.

Our momentum comes from a simple but powerful idea: help every customer-facing team work smarter, not harder. Aircall’s AI Voice Agent automates routine calls, AI Assist streamlines post-call tasks, and AI Assist Pro delivers real-time guidance that helps people do their best work. The result—companies grow revenue, deliver faster resolutions, and scale service.

We’ve built a product customers love and a business that scales fast. Aircall operates in nine global offices (Paris, New York, San Francisco, Sydney, Madrid, London, Berlin, Seattle, and Mexico City), and is backed by world-class investors. Our teams are shipping AI innovation faster than ever and expanding across new product lines and markets.

At Aircall, you’ll join a company in motion—ambitious, profitable, and product-driven—where impact is visible, decisions are fast, and growth is real.

How We Work at Aircall: At Aircall, we believe in customer obsession, continuous learning, and delivering extraordinary outcomes. We value open collaboration, taking ownership, and making smart, informed decisions with speed and precision. If you thrive in a fast-paced, team-driven environment where curiosity, trust, and impact matter, you'll fit right in

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.

Key Responsibilities:

  • 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
  • Apply a deep understanding of RTC / VoIP architectures and protocols
  • Participate in an on-call rotation to respond to critical system issues.
  • Qualifications:

  • You have solid experience building backend services (preferably in TypeScript) 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 the ability to troubleshoot, monitor, and improve distributed systems running in production.
  • You have an understanding of RTC / VoIP architectures and protocols (SIP, RTP).
  • You are familiar with open-source SIP/RTC technologies such as FreeSWITCH, Kamailio, Asterisk, or similar.
  • You have exposure to media servers, signaling flows, or real-time communications debugging.
  • You stay current with modern development practices and tooling, including AI-assisted development tools, to maximize your productivity
  • You have strong communication skills and fluency in English (written and spoken).
  • You are autonomous, proactive, and comfortable owning features end-to-end.
  • You are pragmatic and have a willingness to experiment, iterate, and continuously improve systems.
  • Additional Information

    Why join us?

    🚀 Key moment to join Aircall in terms of growth and opportunities
    💆‍♀️ Our people matter, work-life balance is important at Aircall
    📚 Fast-learning environment, entrepreneurial and strong team spirit
    🌍 45+ Nationalities: cosmopolite & multi-cultural mindset
    💶 Competitive salary package & benefits

    DE&I Statement: 
    At Aircall, we believe diversity, equity and inclusion – irrespective of origins, identity, background and orientations – are core to our journey. 

    We pride ourselves on promoting active inclusion within our business to foster a strong sense of belonging for all. We’re working to create a place filled with diverse people who can enrich and learn from one another. 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.  

    We will constantly challenge ourselves to make sure that we live up to our ambitions around diversity, equity and inclusion, and keep this conversation open. Above all else, we understand and acknowledge that we have work to do and much to learn.

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