Platform Architect: Agentic AI Trust & Security

Ocho People Ltd.; Belfast City District; Hybrid; GBP 120,000 - 170,000; Full time

Benefits offered by this job

Hybrid work from Belfast site

Generous annual leave

Pension plan

Job summary

Ocho People Ltd. is seeking a Platform Architect to define and govern the reference architecture for a major agentic trust and identity platform based in Belfast, with a hybrid work model.

You will drive architectural governance across multiple teams and influence executive strategy. The role demands deep cryptography expertise, workload identity experience, and a proven ability to lead complex global programs within regulated environments.

Qualifications

• Bachelor's degree in Computer Science, Engineering or related field.
• 15+ years of technology leadership experience.
• 7+ years leading enterprise or platform/security architecture for identity or trust.
• Deep cryptography, PKI, HSMs, and key management.
• Experience with workload identity and OAuth 2.x delegations.
• Experience with cryptographic delegation and verifiable technologies (Merkle/CT).
• Expertise across Azure/AWS/GCP with confidential computing.
• Experience with assurance regimes (FIPS 140-3, Common Criteria, SOC 2).
• Proven ability to influence executives and lead cross-functional teams.

Responsibilities

• Define and own the reference architecture spanning identity, authority, execution and assurance for a new agentic trust platform.
• Establish architectural principles, standards and governance across multiple product teams.
• Own the technical specification for workload identity and credential issuance/rotation.
• Design a cryptographically signed delegation and authorisation framework with HSM backing.
• Create a tamper-evident, independently verifiable evidence and audit system for AI decisions.
• Serve as design authority and technical gate across builds on the platform.
• Guide investment decisions on cloud platforms, cryptographic infrastructure and confidential computing.
• Represent the business in industry standards bodies and translate standards into architecture.
• Partner with leadership to align technology investment with business strategy.
• Lead, mentor and develop architects and senior engineers.

Skills

Tech leadership

Enterprise architecture

Crypto PKI

SPIFFE/SPIRE

OAuth 2.x

CT logs

Cloud platforms

Security standards

Stakeholder influence

Education

Bachelor's degree in CS/Engineering

Tools

SPIFFE/SPIRE

OAuth 2.x

Job description

Ocho People Ltd. is seeking a Platform Architect to define and govern the reference architecture for a major agentic trust and identity platform based in Belfast, with a hybrid work model.

You will drive architectural governance across multiple teams and influence executive strategy. The role demands deep cryptography expertise, workload identity experience, and a proven ability to lead complex global programs within regulated environments.