Backend Engineer Authentication
Software Engineering
Brazil
Posted on Sep 26, 2026
About the Technology team
Our Technology teams build the financial infrastructure that moves money for millions of people across the globe. We work on distributed systems at scale — from the payment kernel to AI-powered fraud detection — and we operate on the belief that great engineering is the foundation of everything CloudWalk does.
About this role
- 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
#LI-Remote
What You Need To Succeed
- 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
The Future We See
At CloudWalk, we envision a future where AI empowers every field to reach new heights:
- People teams leveraging AI to transform talent acquisition and employee development.
- Marketing professionals creating data-driven, AI-powered campaign strategies.
- Customer Success teams enhancing client experiences with intelligent solutions.
- Risk analysts combining human expertise with AI to navigate complexities.
- Designers collaborating with AI to push creative boundaries.
Join us at CloudWalk, where we're not just engineering solutions; we're building a smarter, AI-driven future for payments—together.