Senior Software Engineer, Security

About Decagon

Decagon is the leading conversational AI platform empowering every brand to deliver concierge customer experience. Our AI agents provide intelligent, human-like responses across chat, email, and voice, resolving millions of customer inquiries across every language and at any time.

Since coming out of stealth, Decagon has experienced rapid growth. We partner with industry leaders like Hertz, Eventbrite, Duolingo, Oura, Bilt, Curology, and Samsara to redefine customer experience at scale. We've raised over $200M from Bain Capital Ventures, Accel, a16z, BOND Capital, A*, Elad Gil, and notable angels such as the founders of Box, Airtable, Rippling, Okta, Lattice, and Klaviyo.

We’re an in-office company, driven by a shared commitment to excellence and velocity. Our values—customers are everything, relentless momentum, winner’s mindset, and stronger together—shape how we work and grow as a team.

About the Team

The Security Engineering team protects the platform that powers the most advanced conversational AI agents for enterprise customers across voice, chat, email and SMS. We build the security foundations that enable Decagon's AI agents to handle sensitive customer data with complete trust while defending against sophisticated, AI-enabled threats at massive scale.

Our mission is to secure our growing platform, ensuring that AI agents and human agents can collaborate safely to help users resolve their issues while maintaining the highest standards of security and privacy.

About the Role

Join as a Software Engineer, Security where you'll apply strong engineering skills to solve complex security challenges. You'll build some security tools from the ground up while improving our existing systems, with an immediate focus on creating automated tools that remediate security findings from static analysis scans.

This role is for strong engineers who want to apply their skills to security problems, working directly with our Director of Security to shape how we protect our conversational AI platform and internal tooling. This is a senior individual contributor role focused on scalable security solutions and execution.

In this role, you will

• Build automated security tools that remediate vulnerabilities without minimal intervention
• Design and build security tooling, about 50% greenfield development, 50% improving existing systems
• Design and collaborate with product teams to implement and review authentication systems, secrets management, and security automation
• Create detection pipelines that scale with millions of daily AI agent interactions
• Build security libraries and SDKs that make secure development the path of least resistance for engineering teams
• Create automated security testing and remediation pipelines integrated into CI/CD workflows
• Ship security improvements quickly and iteratively, measuring impact through real-world deployment

Your background looks something like this

• Have 3+ years of software engineering experience building production systems
• Strong CS fundamentals with genuine interest in security problems such as authentication, authorization, and cryptography, with the ability to implement them in code
• Track record of shipping code quickly and iterating based on feedback
• Bias towards action — you prototype fast and ship daily
• Software engineering skills in Python, Go, Scala, Terraform, or other languages – you write clean, efficient, maintainable code
• Natural curiosity about new technologies and approaches to security problem

Even better

• Experience building developer tools or automation
• Background with static analysis tools (Semgrep, CodeQL)
• Experience with cloud infrastructure and modern development practices (data pipelines,, infrastructure as code)
• Comfortable working across the entire stack to solve problems

Benefits

• Medical, dental, and vision benefits
• Take what you need vacation policy
• Daily lunches, dinners and snacks in the office to keep you at your best
• Unlimited compute resources and budget for security tools