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03Backend

Distributed Token & Caching Service

A horizontally scalable Spring Boot token service backed by Redis, designed to reduce repeated calls to downstream identity systems and improve authentication throughput under high request volume.

  • Spring Boot
  • Redis
  • Distributed systems
Distributed Token & Caching Service — architecture
Stateless · scales outApplication / API Consumerstoken requestsToken Service InstancesNode.js · N replicasRedisshared cacheIdentity / Auth ProviderdownstreamToken Responsecached or generated

Overview

What was built

Designed and implemented a distributed token service using Spring Boot and Redis to centralize token generation, caching, renewal, and invalidation. Requests first check the shared cache and reuse valid tokens when available; cache misses trigger a controlled downstream authentication flow before storing the result with an appropriate TTL. The stateless service can run across multiple instances while Redis provides a shared token state, reducing redundant authentication traffic and improving response time and resilience.

Technology

  • Spring Boot
  • Redis
  • Distributed systems
  • Performance profiling
  • REST APIs

Next project

Self-Service Identity Portal

Full-stack

Password reset and account unlock, taken in-house and off the helpdesk.