Senior Software Engineer, Platform Security at Decagon · LumiJobs

Responsibilities

We're hiring our founding Platform Engineer, Security to design, build, and operate the security infrastructure that powers Decagon's AI platform. This is a builder's role: you'll spend your time creating durable, well-engineered systems including paved paths for secure service creation, security tooling that automatically applies secure configurations, and infrastructure-as-code that makes it easy for every engineer at Decagon to do the right thing.
As the first dedicated engineer at this intersection, you'll have outsized impact on how security infrastructure is built here, and you'll shape the technical direction of the infrastructure security program. You'll also help us invest in automation, observability, and self-service so the team operates with confidence.
The work is close to the business. Decagon serves some of the world's most security-conscious enterprises, including major financial-services institutions, and the security platform you build directly unlocks these high-value deals. This role offers a clear runway to grow your impact across security, infrastructure, and platform engineering.
Design and implement secure, multi-tenant infrastructure that isolates customer data while enabling efficient AI model serving across our platform
Build "golden paths" for security including service templates, libraries, terraform policies, and automation, so new services are secure and production-ready by default
Own infrastructure-as-code (Terraform) and GitOps best practices, including reusable modules and policy-as-code
Expand and help operate the platforms behind alerting detection, secrets management, IAM, and automated remediation, integrating them cleanly into CI/CD and developer workflows
Partner with Security, Infrastructure, and product engineering teams to translate enterprise and compliance requirements (SOC 2, ISO 27001, GDPR) into reliable, automated technical controls
Participate in security on-call and continuously raise the bar on operability, runbooks, and incident learnings

Senior Software Engineer, Platform Security

Responsibilities

Qualification

Required

Benefits

Company

Decagon

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