VoIP Engineer

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.

As a VoIP Engineer, your mission will be to own the stability, performance, and scaling of Aircall’s core telephony infrastructure. You will be a crucial technical driver in the adoption of cutting-edge cloud telephony technologies, ensuring secure, high-quality, and reliable voice connectivity for our global customer base. You will bridge the gap between traditional telecom and modern cloud-native engineering.

What you'll do: :
• Own the Voice Stack: Design, implement, and maintain the SIP/RTP/WebRTC infrastructure that powers our global voice platform.
• Cloud SBC Management: Take primary responsibility for the configuration, deployment, and operation of our Cloud Session Border Controllers (SBCs), with deep expertise in Ribbon to manage carrier interconnects, security policies, and numbering plan logic.
• DevOps and Cloud Infrastructure: Implement Infrastructure-as-Code (IaC) using tools like Terraform or CloudFormation to manage voice infrastructure on AWS. You will integrate voice services into our continuous integration/continuous deployment (CI/CD) pipelines.
• Monitoring & Reliability: Set up and maintain advanced monitoring, alerting, and logging systems (e.g., Datadog, Hepic) to proactively identify and resolve high-severity incidents related to connectivity and audio media quality.
• Cross-Functional Collaboration: Work closely with the Infrastructure, Carriers Relations and Product teams to introduce new features, improve call routing logic, and troubleshoot complex, end-to-end communication issues.
• Automation: Introduce automation to recurring operational tasks, network provisioning, and reporting.

What you'll bring::
• Proven experience as a VoIP/Telecommunications Engineer in a high-volume, cloud-based environment.
• Expert-level knowledge of SIP, RTP, and associated protocols.
• Deep, hands-on experience deploying and managing Cloud Session Border Controllers (SBCs), specifically RibbonStrong practical experience with AWS cloud infrastructure (EC2, VPC, Lambda, SQS, CloudWatch) and using DevOps methodologies.
• Solid networking fundamentals (TCP/IP, UDP, BGP, firewalls).

Nice-to-haves: :
• AI-driven software development skills are a significant plus, particularly in scripting and backend development using languages like TypeScript, Node.js, Python, or Go.
• Familiarity with containerization technologies (Docker, Kubernetes).
• Experience working with large-scale data analysis related to voice quality and call detail records (CDRs).

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 are strongly committed to hiring a diverse and multicultural team and we encourage applications from traditionally underrepresented backgrounds.