Software engineer, Programmable Comms

Aircall.io, Inc.; Madrid; Presencial; EUR 70.000 - 110.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Competitive salary package

Descripción de la vacante

Aircall is hiring for its Programmable Communications Team in Madrid, Spain. You’ll design and build scalable backend services, ensuring high availability and performance for voice and messaging infrastructure.

Work on CI/CD pipelines, automated testing, and production release workflows in AWS environments. Ideal candidates have strong backend experience, containerized deployments, and a solid grasp of RTC/VoIP protocols along with English communication skills.

Formación

• Solid experience building backend services with a focus on security, scalability, availability, and performance.
• Strong knowledge of CI/CD pipelines, IaC, automated testing, and deployment best practices.
• Hands-on with GitLab CI/CD (or similar), release workflows, code reviews, and continuous delivery in production.
• Proficient in containerized environments (Docker, Kubernetes).
• Experience operating and optimizing systems in AWS production environments.

Responsabilidades

• 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 in production environments.
• Debug and optimize the application's performance, focusing on memory leaks and CPU usage in a desktop environment, critical for maintaining audio quality during calls.
• Operate, monitor, and optimize distributed systems in AWS production environments.
• Lead initiatives to improve the reliability, resilience, and performance of distributed systems from design through production operation.
• Apply knowledge of RTC / VoIP architectures and protocols
• Participate in an on-call rotation to respond to critical system issues.

Conocimientos

Backend design

CI/CD

Docker/Kubernetes

AWS

RTC/VoIP

Herramientas

GitLab CI/CD

Git

Kubernetes

Descripción del empleo

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.

Our momentum comes from a simple idea: help teams work smarter, not harder. Aircall’s AI Voice Agent automates routine calls, AI Assist streamlines post-call work, and AI Assist Pro delivers real-time guidance so people can do their best work. The result is higher revenue, faster resolutions, and teams that scale with confidence.

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 ambitious, product-driven, and execution-focused, with visible impact, fast decisions, and real growth.

How we work at Aircall:We’re customer-obsessed, data-driven, and focused on delivering meaningful outcomes. We value ownership, continuous learning, and thoughtful speed. If you thrive in a collaborative, fast-moving environment where trust and impact matter, you’ll feel at home here.

The Team:

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

Lead initiatives to improve the reliability, resilience, and performance of our distributed systems, from design through production operation.

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 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.

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

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.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.