ClickUp
Backend engineering for millions of concurrent users at sub-second latency.
01 / Overview
The Scope & Objective
ClickUp engaged our team to design and implement mission-critical backend integrations that would support their rapidly growing user base without sacrificing performance. The scope included database sharding strategies, real-time sync protocols, and third-party API orchestration.
02 / The Challenge
Operational Friction & Bottlenecks
At millions of concurrent users, even microsecond inefficiencies compound into degraded user experiences. Database read contention and unoptimized API fan-out patterns were creating latency spikes that impacted retention metrics.
03 / The Solution
Architectural Implementation
We implemented a hybrid read-replica sharding model, offloaded high-frequency queries to Redis edge caches, and re-architected the API fan-out layer with batched async processing. Result: p99 latency dropped from 850ms to under 90ms.
04 / Deliverables
Production Artifacts
Project Details
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