Principal Security Engineer, Cloud & IAM

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

Benefits offered by this job

25 days annual leave

Gympass subscription

Cycle to Work Scheme

Private medical insurance via Bupa

Participation in company shares

Enhanced parental pay & leave

Job summary

Radiant in the United Kingdom seeks a Principal Software Engineer - Security to set the technical direction of Radiant's security across the cloud platform and infrastructure, delivering scalable, automated security solutions. You will design and build core services for IAM, access control, encryption, auditability, and policy enforcement, and partner with product, SRE, networking, and compliance teams.

The role requires Go or similar languages, deep distributed-systems experience, and a track

Qualifications

• Strong hands-on engineering skills in Go or similar
• Extensive experience building and operating large-scale distributed systems with cloud and network security
• Track record of technical leadership at staff or principal level across multiple teams
• Deep expertise in identity and access management, security controls, infrastructure, and operations

Responsibilities

• Set the technical vision and architecture for security systems and platform capabilities and lead design/implementation
• Design and build core security services across IAM, RBAC, workload identity, encryption, audit logging, policy enforcement
• Translate requirements into robust architectures, APIs and designs in collaboration with Security Product Manager
• Drive automation of policy enforcement, configuration hardening, detection, remediation, and software supply chain security
• Ensure least-privilege access and tenant isolation across control/data planes
• Represent security in enterprise customer reviews, audits, and incident response
• Raise security engineering standards through mentoring, code reviews, and standards

Skills

Go

Distributed systems

Cloud security

Technical leadership

Zero-trust architecture

Tools

Vault

OPA/Gatekeeper

SPIFFE/SPIRE

Kubernetes security tooling

Sigstore

SIEM platforms

Cloud KMS

Job description

Radiant in the United Kingdom seeks a Principal Software Engineer - Security to set the technical direction of Radiant's security across the cloud platform and infrastructure, delivering scalable, automated security solutions. You will design and build core services for IAM, access control, encryption, auditability, and policy enforcement, and partner with product, SRE, networking, and compliance teams.

The role requires Go or similar languages, deep distributed-systems experience, and a track