Backend Engineer Authentication

What You'll Do

This role sits on a team that owns both auth and ledger, so you'll occasionally pick up work across both areas.

• Develop and maintain authentication systems used by both customers and internal services - Build and operate token issuance, validation, and rotation - Maintain HSM-backed key management and signing infrastructure - Improve the security of auth flows in a regulated financial environment - Build SDKs and tooling that other engineering teams use to integrate with auth - Communicate clearly with both technical and non-technical stakeholders

Who You Are

• Has operated critical infrastructure on cloud providers like GCP or AWS, using tools such as Terraform - Has experience with cryptographic authentication systems - Has experience with authentication and authorization protocols (OAuth/OIDC, JWT, SAML) - Has experience with PCI compliant systems - Is proficient in Rust - Some knowledge of the Brazilian payments ecosystem is a plus - Experience with HSMs is a plus - Communicates clearly and effectively - Advanced English communication skills, primarily for internal communication with our diverse, multinational team