Senior Security Engineer - Cloud Platform & IAM

Radiant; United Kingdom; On-site; GBP 120,000 - 180,000; Full time

Benefits offered by this job

25 days annual leave

Private medical insurance (Bupa)

Cycle to Work

Gympass

Employee shares

Enhanced parental pay & leave

Job summary

Radiant is seeking a Senior Software Engineer - Security to design, build, and operate security capabilities protecting our cloud platform and infrastructure. You’ll own significant security services from design through production, collaborating with product, infrastructure, SRE, networking, and compliance teams.

You will implement strong tenant isolation, policy enforcement, and deep security controls across IAM, encryption, audits, and network security, while guiding others and advancing

Qualifications

• Strong hands-on engineering experience in systems languages (Go or similar).
• Experience building and operating distributed systems with cloud security focus.
• Ownership of components end-to-end from design through production and operation.
• Knowledge of multi-tenancy, least privilege, zero-trust, threat modelling, and shared responsibility.

Responsibilities

• Design, build, and operate security services and platform capabilities.
• Build core security services across IAM, RBAC, secrets, encryption, audit logging, and policy enforcement.
• Translate product, customer, and regulatory requirements into APIs and implementations.
• Automate policy enforcement, hardening, detection, remediation, and software supply chain security.
• Ensure tenant isolation and least-privilege access across control and data planes.
• Support enterprise customer security reviews, audits, and incident response.
• Contribute to security engineering standards and mentor others.

Skills

Go

Distributed systems

Cloud security

Security infra

Tools

Vault

OPA/Gatekeeper

SPIFFE/SPIRE

Kubernetes admission control

Sigstore

SIEM

Cloud KMS

Job description

Radiant is seeking a Senior Software Engineer - Security to design, build, and operate security capabilities protecting our cloud platform and infrastructure. You’ll own significant security services from design through production, collaborating with product, infrastructure, SRE, networking, and compliance teams.

You will implement strong tenant isolation, policy enforcement, and deep security controls across IAM, encryption, audits, and network security, while guiding others and advancing