Principal Platform Engineer (Identity Platform)

Location: Staines-upon-Thames, England, United Kingdom; hybrid work opportunities are available.

Company

hirify.global develops AI-native enterprise software on a cloud-based platform for asset, operations, and critical-service management.

What you will do

• Architect and build a unified fine-grained authorization model across cloud-native, legacy hosting, and lifecycle cloud environments.
• Develop and operate relationship-based authorization with SpiceDB on PostgreSQL for distributed, multi-tenant enterprise systems.
• Architect and operate enterprise authentication on Curity while supporting Keycloak migrations, federation, SSO, and directory integration.
• Design authorization schemas and permission models, balancing correctness, latency, consistency, observability, and traceability.
• Run identity infrastructure on Kubernetes using Helm, persistent volumes, blue/green cutovers, backup and restore, and disaster recovery.
• Write Go and contribute to distributed, event-driven systems using Kafka or RedPanda, GitOps, and infrastructure as code.

Requirements

• Principal-level experience architecting and engineering fine-grained authorization systems at production scale in distributed, multi-tenant environments.
• Hands-on production experience with SpiceDB, OpenFGA, Ory Keto, or an equivalent Zanzibar-style authorization engine.
• Practical knowledge of ReBAC, RBAC, ABAC, policy-as-code approaches such as OPA/Rego or Cedar, and authorization schema design.
• Hands-on production experience operating Curity and/or Keycloak, including configuration, customization, extensions, upgrades, and troubleshooting under load.
• Deep knowledge of OAuth 2.0, OIDC, SAML 2.0, JWT and opaque-token patterns, enterprise federation, SSO, LDAP, and Active Directory.
• Experience with Go, PostgreSQL, Kubernetes or AKS, containers, GitOps, infrastructure as code, and event-driven distributed systems.

Culture & Benefits

• Hybrid work opportunities with flexibility to support different working styles.
• Work in a global and diverse enterprise software environment.
• Strong emphasis on collaboration, sustainability, inclusion, and practical impact.
• Hands-on engineering culture that values clear technical opinions and constructive challenge.
• Use of AI tooling is expected, with emphasis on understanding what engineers delegate and what they build themselves.