A WebSocket bidding engine for an online auction house that replaced 5-second polling with sub-100ms bid updates and held 25,000 concurrent bidders on closing nights without downtime.
Direct Business Impact
"Brought bid update latency from 5 seconds to under 100ms, eliminated disputed bid-order tickets entirely in the first six months post-launch, and sustained 25,000 concurrent bidders through closing nights with zero downtime."
01 · Baseline Bottlenecks & Legacy Constraints
An online auction house ran its bidding on a 5-second polling loop, so bidders regularly submitted against a stale price and lost lots they believed they had won. Every closing night produced disputes the support team had to settle by hand, and the platform buckled under the concurrency spike in the final minutes of each auction.
Key Deliverables & Milestones
3 Highlights
WebSocket bidding engine with sub-100ms price fan-out
Atomic bid ordering & anti-snipe automatic lot extension
Live video streams with a synchronized real-time bid overlay
Technology & Infrastructure Stack
Node.jsWebSocketRedisPostgreSQLDockerAWS
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