We at Confiz are hiring a Principal Backend Engineer with strong expertise in backend technologies, system architecture, and performance optimization. Join our team to design and build scalable, secure, and high‑performing backend systems that power exceptional digital experiences for global enterprises.

Responsibilities

• Own microservices in NestJS (TypeScript): define module boundaries, version APIs, and ship resilient, well-tested services.
• Design internal communication: implement REST/gRPC/event‑driven patterns (e.g., request/response, pub/sub), handle retries, timeouts, backoff, and circuit breakers.
• Implement secure JWT auth: access/refresh lifecycles, rotation, audience/issuer validation, revocation/blacklisting, and token storage best practices.
• Deliver payment integrations: integrate with gateways (e.g., Stripe/Adyen/Braintree), implement idempotent operations, handle captures/refunds/disputes, and reconcile via signed...