security engineer

StackOne is an AI integration gateway that provides a unified API for SaaS platforms and AI agents to securely orchestrate hundreds of enterprise-grade integrations through real-time architecture, managed authentication, and end-to-end observability.

• Own the secure SDLC by driving SAST, dependency scanning, and secrets detection standards across all repositories and CI/CD pipelines;
• Harden the AWS and Cloudflare estate using zero-trust patterns, network segmentation, and advanced IAM/KMS configurations for multi-tenant environments;
• Threat-model new product features, connector executions, and agent tool-calling paths to ensure robust security for complex authentication and OAuth flows;
• Define the security architecture and strategy from the ground up;
• Ship production code and security tooling.

• Have 3+ years of security engineering experience;
• Have deep hands-on expertise in AWS security services such as GuardDuty, Security Hub, and KMS;
• Ship production-grade code using TypeScript, Python, or Go;
• Have a strong background in Infrastructure as Code with CDK or Terraform;
• Understand application security, including OWASP Top 10 and threat modeling;
• Have experience securing B2B SaaS multi-tenant environments at scale.

• Equity included;
• Office role in London, UK.