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Private repoBackendDistributed system

Taskify

Five microservices, sub-20ms real-time synchronization

Role
Backend
Period
2025
Status
Private repo
Links
—
Taskify — Visit site

By the numbers

5
microservices
<20ms
sync latency

Overview

Task management across five decoupled microservices, with Redis and Kafka syncing state between active users at sub-20ms latency.

  • Task, user, notification, activity and auth services are coupled only through Kafka events.
  • Redis pub/sub pushes state changes to active users instantly.

01

Problem

Two users on the same board should see each other's changes without refreshing. A monolith does this easily; the goal was to achieve it with five separate services and no direct calls between them.

02

Approach

Each service owns its database; communication is Kafka events only. For user-facing live updates, Redis pub/sub is used: the task service publishes the change and the connection layer pushes it to the relevant users.

03

Architecture

  1. Client
    • React
    • Canlı bağlantı
  2. Services
    • Görev
    • Kullanıcı
    • Bildirim
    • Aktivite
    • Yetki
  3. Infrastructure
    • Kafka
    • Redis pub/sub
    • PostgreSQL ×5
↓ Data flows top to bottom

04

Key decisions

  1. 01

    Kafka for durable flow, Redis for instant push

    They don't replace each other: Kafka is the durable inter-service event log, Redis pub/sub is the millisecond push to the user.

Outcome

State synchronization between active users measured under 20ms. Role-based access control is shared across all services.

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