Backend Engineer Authentication

CloudWalk

São Paulo, State of São Paulo, Brazil
Full Time - remote
Posted May 31, 2026

Job Description

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
- S...