Senior Cloud Security Engineer - Platform & IAM

Academic Key; United Kingdom; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

25 days annual leave

Learning Time

Job summary

Radiant, based in the United Kingdom, is seeking a Senior Software Engineer - Security to design, build, and operate security capabilities that protect our cloud platform and infrastructure. You will own security services from design through production, partnering with product, SRE, networking, security, and compliance teams to deliver scalable, automated protections across the platform.

The role emphasizes Identity, access control, secrets management, encryption, auditability, and policy

Qualifications

• Experience with cloud and network security, IAM, or security infrastructure.
• Hands-on engineering in one or more systems languages (Go preferred).
• Experience owning significant components end-to-end, from design through production.

Responsibilities

• Design, build, and own security services and platform capabilities.
• Automate policy enforcement, configuration hardening, detection, remediation, and software supply chain security.
• Implement strong tenant isolation and least-privilege access across the control plane and data plane.
• Support enterprise customer security reviews, audits, and incident response.
• Contribute to security engineering standards through code review and mentoring.

Skills

Go

Distributed systems

IAM / security infra

End-to-end ownership

Tools

HashiCorp Vault

OPA / Gatekeeper

SPIFFE / SPIRE

Kubernetes security tooling

Sigstore

SIEM platforms

Cloud KMS

Job description

Radiant, based in the United Kingdom, is seeking a Senior Software Engineer - Security to design, build, and operate security capabilities that protect our cloud platform and infrastructure. You will own security services from design through production, partnering with product, SRE, networking, security, and compliance teams to deliver scalable, automated protections across the platform.

The role emphasizes Identity, access control, secrets management, encryption, auditability, and policy