Principal Architect — Trust Registry & Decentralised Identity

Ready to help define the trust infrastructure behind the next generation of digital identity? Ditto is a fast-growing B2B SaaS company redefining how regulated industries establish digital trust. Our privacy-first identity platform, built on Zero-Knowledge Proof technology, powers secure and compliant customer interactions across banking, fintech, crypto, travel, and gaming. Trusted by organisations including Temenos, LTIMindtree, and Infosys Finacle, we are scaling globally from our Barcelona headquarters and building the next generation of decentralised identity and trust infrastructure. We are looking for a Principal Architect to lead the design of Ditto’s Trust Registry & Decentralised Identity platform — the infrastructure that allows Ditto to trust third-party credentials and enables Ditto-issued credentials to be trusted globally in return. This is a rare opportunity to architect foundational trust infrastructure at the intersection of identity, cryptography, verifiable credentials, AI-agent identity, and cross-border assurance. You will lead the architecture behind: trust registries and DID infrastructure credential issuance and verification services OID4VCI / OID4VP flows holder-binding and attestation services cross-border credential trust and assurance status list and credential lifecycle infrastructure AI-agent and workload credential trust You’ll work across Ditto Verify, Authenticate, and Protect, combining identity verification, authentication assurance, device telemetry, and post-quantum cryptography into a unified decentralised trust platform. We’re looking for someone with: 10+ years in digital identity, cryptography, or trust infrastructure architecture hands-on production experience with Verifiable Credentials and OID4VC* standards experience designing trust registries, PKI hierarchies, DID systems, or trust lists at scale strong knowledge of identity and trust standards including W3C VC, SD-JWT VC, ISO mDL, OpenID Federation, and eIDAS 2.0 practical experience integrating AI/LLM systems into production environments excellent written and verbal communication skills in English Experience with post-quantum cryptography, EUDI Wallet ecosystems, DID programmes, OpenID standards, NIST 800-63, banking-grade trust infrastructure, or standards-body participation is highly valued. Spanish is a plus. Recruitment Process Introductory conversation with Talent CTO & CPO conversations Collaborative 90-minute architecture working session Final meeting with Ditto leadership If you want to help shape the future of decentralised identity, verifiable credentials, and global trust infrastructure, we’d love to hear from you. Apply To This Job