Staff Security Engineer, Product Security

Job Description

Job Description

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 Staff Security Engineer, Product Security, you will drive Aircall’s product security strategy and execution by embedding security into the product lifecycle — from design to deployment. You will partner closely with Engineering, Product, and Platform leaders to ensure Aircall’s systems are secure, resilient, and reliable by default, risks are proactively mitigated, and security enables teams to ship quickly and safely without compromising availability or customer trust.

This is a Staff-level role, which means you will operate with broad scope and significant autonomy, owning cross-cutting initiatives that improve product security maturity and system reliability across teams. You will be expected to influence architecture and development practices at scale, set technical direction, create repeatable patterns and guardrails, and mentor engineers across the organization — not only solving security problems, but ensuring solutions are durable, scalable, and operationally sound over time.

Responsibilities :

• Drive and scale secure-by-design practices across product and engineering teams, integrating security into design, development, CI / CD, and release workflows.
• Lead security design and architecture reviews for major product initiatives; define security requirements, controls, and patterns that teams can adopt consistently.
• Own and evolve threat modeling practices, ensuring risks are systematically identified early and mitigations are validated.
• Perform deep technical assessments (manual code review, targeted security testing, validation of fixes) for high-impact findings and critical services.
• Identify and reduce classes of vulnerabilities across Aircall’s codebases and services (e.g., auth / authz flaws, injection, logic issues, SSRF, API security, cloud misconfigurations).
• Build and improve security tooling and automation that scales across engineering (e.g., guardrails, CI checks, policy-as-code, leveraging AI for autonomous security-review processes  that don’t slow delivery).
• Triage and drive remediation of vulnerabilities discovered through internal testing, automated detection, and external reports (including coordinated disclosure where applicable).
• Investigate and respond to product security incidents, helping with containment, root cause analysis, and prevention. Participate in on-call / threat-response rotations, escalating and coordinating during high-severity events.
• Stay up to date on attacker techniques (MITRE ATT&CK, red team reports, threat intel) and propose new detection patterns or responses accordingly.
• Serve as a trusted advisor to engineering and product leadership, translating security risks into pragmatic, prioritized actions and tradeoffs.
• Own cross-team product security initiatives (e.g., secure SDLC improvements, secure design frameworks, security champions, org-wide security patterns and standards).
• Mentor and up-level engineers across security and product teams through reviews, pairing, coaching, and security education.

Should have :

Bonus / Nice-to-have :

This is not including equity and other benefits. The actual salary offered will carefully consider a wide range of factors, including your skills, qualifications, and experience.

Why join us?

\uD83D\uDE80 Key moment to join Aircall in terms of growth and opportunities

\uD83D\uDC86️‍♀️ Our people matter, work-life balance is important at Aircall

\uD83D\uDCDA Fast-learning environment, entrepreneurial and strong team spirit

\uD83C\uDF0D 45+ Nationalities : cosmopolite & multi-cultural mindset

\uD83D\uDCB5 Competitive salary package & equity

\uD83C\uDFE8 Medical, dental, and vision insurance is 100% covered

\uD83D\uDCC8 401k plan with company matching!

✈️ Unlimited PTO — take the time you need to come to work feeling great!

⭐️ Wellness, internet, and childcare reimbursements

\uD83D\uDC9A Generous parental leave policy

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.

Want to know more about candidate privacy? Find our Candidate Privacy Notice here.

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.