Backend Engineer, Real-Time Voice & Communications

Aircall; Madrid; On-site; EUR 80,000 - 110,000; Full time

Benefits offered by this job

Competitive salary package

Strong team culture

Job summary

Aircall is hiring a backend-focused engineer to design and scale secure services for high-volume voice and messaging workloads. You will work on robust CI/CD pipelines, ramping automation, and real-time communications infrastructure.

The role emphasizes ownership, fast iteration, and cross-functional collaboration in a distributed system environment with AWS and containerized deployments.

Qualifications

• Strong focus on security, scalability, availability, and performance.
• Experience with CI/CD pipelines, IaC, automated testing, and deployment best practices.
• Hands-on experience with containerized environments (Docker, Kubernetes).
• Experience operating and optimizing systems in AWS production environments.

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 in production environments.
• Debug and optimize the application’s performance, focusing on memory leaks and CPU usage in a desktop environment, critical for maintaining 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 distributed systems from design to production operation.
• Apply understanding of RTC / VoIP architectures and protocols.
• Participate in an on-call rotation to respond to critical system issues

Skills

Security-minded

Distributed systems

English fluency

Autonomous

Problem solving

Tools

Docker

Kubernetes

GitLab CI/CD

AWS

Job description

Aircall is hiring a backend-focused engineer to design and scale secure services for high-volume voice and messaging workloads. You will work on robust CI/CD pipelines, ramping automation, and real-time communications infrastructure.

The role emphasizes ownership, fast iteration, and cross-functional collaboration in a distributed system environment with AWS and containerized deployments.