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Aircall

Software Engineer – Programmable Comms

Aircall

Software Engineer building scalable backend services for AI-powered communications platform. Ensuring performance, security, and high availability in a hybrid work environment.

Posted 7/2/2026full-timeMadrid • 🇪🇸 SpainMid-LevelSeniorWebsite

Tech Stack

Tools & technologies
AWSDistributed SystemsDockerKubernetesVoIP

About the role

Key responsibilities & impact
  • Design and build highly scalable and secure backend services
  • Ensure high availability, performance, and security for high-volume workloads
  • Design and maintain robust CI pipelines (GitLab CI)
  • Debug and optimize application's performance
  • Operate, monitor, and optimize distributed systems in AWS
  • Lead initiatives to improve the reliability and performance of distributed systems
  • Apply a deep understanding of RTC / VoIP architectures and protocols
  • Participate in an on-call rotation to respond to critical system issues

Requirements

What you’ll need
  • Solid experience building backend services
  • Strong knowledge of CI/CD pipelines
  • Hands-on experience with GitLab CI/CD (or similar)
  • Proficient in working in containerized environments (Docker, Kubernetes)
  • Experience operating and optimizing systems in AWS production environments
  • Understanding of RTC / VoIP architectures and protocols (SIP, RTP)
  • Familiar with open-source SIP/RTC technologies (FreeSWITCH, Kamailio, Asterisk)
  • Exposure to media servers, signaling flows, or real-time communications debugging
  • Stay current with modern development practices and tooling
  • Strong communication skills and fluency in English
  • Autonomous and proactive

Benefits

Comp & perks
  • Competitive salary package & benefits
  • Work-life balance is important at Aircall
  • Fast-learning environment
  • Entrepreneurial and strong team spirit
  • DE&I Statement promotes active inclusion

ATS Keywords

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Hard Skills & Tools
Backend Service DevelopmentCI/CD Pipeline ImplementationAWS OptimizationRTC/VoIP ProtocolsSIP ProtocolRTP ProtocolGitLab CIDockerKubernetesOpen-Source SIP Technologies
Soft Skills
Strong Communication SkillsAutonomousProactive