DevSecOps Platform Security Engineer Job Description

DevSecOps Platform Security Engineers exist because the traditional security review model — where a security team evaluated software after developers finished building it — broke down at the scale and velocity modern engineering organizations operate at. When a company ships code dozens or hundreds of times per day, a manual security gate is either a bottleneck that gets bypassed or a fiction that gets rubber-stamped. Platform security engineers build the automated alternative.

The core of the job is owning the security layer of the software delivery platform: the CI/CD pipelines, the cloud infrastructure provisioning systems, the container orchestration layer, and the developer toolchains that sit between an engineer writing code and that code running in production. A DevSecOps platform engineer's job is to make the secure path the easy path — so that developers building features aren't choosing between moving fast and moving safely.

In practice, a week might include: writing a new OPA policy that blocks Terraform plans from creating S3 buckets with public ACLs and deploying it to the policy-as-code gateway; triaging a spike in critical SAST findings after a team migrated to a new framework; investigating why a Falco alert fired on a production pod and whether it represents a real compromise or a noisy rule; and sitting in a threat modeling session with the payments team on a new webhook handler they're designing.

The role also carries a significant advocacy dimension. Platform security engineers are often the primary interface between the security organization and the engineering org — translating security requirements into developer tooling, explaining why a vulnerability matters, and pushing back when a proposed control would create enough friction to guarantee workarounds. That requires genuine credibility with engineers, which means writing code that works and understanding the constraints developers actually operate under.

At larger organizations, the platform security engineer may specialize in one domain: supply chain security, cloud security posture management, or runtime protection. At smaller companies, the role covers all of it. Either way, the scope has grown substantially as cloud-native architectures have made the attack surface simultaneously larger and more programmable.

Education:

• Bachelor's in computer science, software engineering, or information security (common but not screening criteria at most companies)
• Bootcamp or self-taught engineers with verifiable open-source contributions and hands-on cloud/security lab work are competitive
• Graduate security programs (Georgia Tech OMSCS, SANS Technology Institute) valued for government and regulated-sector roles

Experience benchmarks:

• 5–8 years in software engineering, SRE/platform engineering, or cloud security with demonstrable overlap between disciplines
• Direct experience operating Kubernetes in production — not just knowing the concepts
• At least one prior role where you owned a security toolchain from selection through production operation

Technical depth expected at interview:

• CI/CD platforms: GitHub Actions, GitLab CI, Jenkins, CircleCI — pipeline-as-code authoring, not just usage
• Cloud security: IAM least-privilege design, service control policies (AWS SCPs), VPC architecture, workload identity
• Container security: image scanning (Trivy, Grype, Snyk), distroless/minimal base images, OCI artifact signing
• Secrets management: Vault dynamic secrets, IRSA/Workload Identity for secretless auth, rotation automation
• Policy-as-code: OPA/Rego policy authoring, Kyverno, Checkov for IaC
• Programming: Python and Go at a production-quality level; Bash for glue scripts

Certifications that help:

• CKS (Certified Kubernetes Security Specialist)
• AWS Security Specialty / GCP Professional Cloud Security Engineer
• OSCP or GPEN for roles with offensive validation components
• CSSLP (Certified Secure Software Lifecycle Professional) for SDLC-heavy environments

Soft skills that matter:

• Ability to say no without creating adversaries — developers will route around controls they find unreasonable
• Written communication for runbooks, post-mortems, and security architecture decision records
• Comfort operating in ambiguity: this role often defines its own scope rather than inheriting it

DevSecOps platform security is one of the cleaner hiring markets in information security right now, for a specific reason: the talent pool that can do both sides of the job — real software engineering and real security — is genuinely small. Security professionals who can't code and developers who don't understand offensive thinking both struggle in this role, which means companies can't fill it by retraining either population at scale.

Demand signals are straightforward. The volume of software being shipped is increasing. The regulatory environment — PCI DSS 4.0, SOC 2 with more prescriptive controls, emerging SEC cyber disclosure requirements — is pushing organizations to demonstrate automated, auditable security controls rather than manual processes. And the supply chain attack surface (SolarWinds, Log4Shell, XZ Utils) has put software supply chain security on boardroom agendas in a way that translates into headcount approvals.

The AI factor is real and cuts in both directions. LLM-assisted coding is generating more code faster with more security debt embedded in it. That increases the platform security workload. Simultaneously, AI-native detection and response tooling is automating parts of the vulnerability triage and incident response workflow that previously consumed significant engineer time. Net effect: organizations need fewer security engineers per unit of code shipped than they did five years ago, but they need those engineers to be more technically sophisticated.

Career trajectory from this role typically runs in two directions. The platform-and-infrastructure track leads toward Staff Security Engineer, Principal Security Architect, or VP of Platform Security at a product company. The management track leads toward Security Engineering Manager or CISO at a mid-market company where the CISO still carries technical depth. Some experienced platform security engineers move into security-focused VC or consulting, where their ability to evaluate technical security posture quickly commands a premium.

Geographically, remote work is standard in this role — it's an inherently distributed function, and the tooling runs in cloud environments that don't require physical presence. That means salary bands have compressed somewhat from the 2021 peak but remain strong relative to most IT disciplines. Companies in financial services, healthcare technology, and defense contracting are the most aggressive recruiters for cleared or clearance-eligible engineers with this profile.

Dear Hiring Manager,

I'm applying for the DevSecOps Platform Security Engineer role at [Company]. I've spent the last six years at the intersection of platform engineering and security — first as a software engineer who got pulled into AppSec work, then as the lead platform security engineer at [Company], where I built the security layer of a CI/CD platform that serves about 200 engineers shipping to AWS and GKE.

The work I'm most proud of there is the software supply chain program I designed and deployed over the past 18 months. We started with no SBOM visibility and no artifact provenance controls. I built a pipeline that generates CycloneDX SBOMs on every build, signs container images with Cosign against our Fulcio instance, and gates production promotion on a Kyverno policy that rejects unsigned images or images with critical CVEs in the OS layer. Adoption was the hard part — I had to make the signing step invisible to developers and build the escape-hatch process for legitimate exceptions before asking any team to onboard. We're at 94% fleet coverage now.

I've also operated Falco in production through two actual security incidents — one cryptominer running in a compromised container and one case of lateral movement via a misconfigured service account. Both detections came from custom rules I'd written for our environment, not default rules, which made the difference in signal-to-noise.

I'm looking for a role with broader cloud scope and exposure to the financial services regulatory environment. [Company]'s multi-cloud architecture and the PCI DSS scope that comes with the payments platform look like the right context for what I want to work on next.

Thank you for your time.

[Your Name]