AdTech Engineering Lead focused on programmatic advertising infrastructure. I help DSPs and SSPs build high-performance bidding systems that handle millions of bid requests per second without burning a hole in the infra budget.
- 🎯 OpenRTB 2.5 / 2.6 / 3.0 protocol implementation & migration
- ⚡ JVM tuning for sub-50ms bid response under 100K+ QPS
- 🗄️ Aerospike / Redis Cluster sizing for hot user profile lookup
- 🧮 Bid shading & pacing algorithms in production
- 🔐 TCF 2.2 / GPP compliance integration
- Architected a Java-based bidder serving X billion bid requests/day
- Cut p99 bid latency from 120ms → 38ms
- Migrated legacy XML bidder to OpenRTB 2.6 with zero downtime
- 🤝 Fractional CTO / Tech Advisory engagements
- 🔍 Architecture review & code audit (1–4 weeks)
- 💼 Long-term contractor roles (20h+/week, fully remote)
- ✍️ Blog
- 📅 Book a 30-min call
- 📫 charles [at] cylshao.com
DM in English preferred. Async-first communicator. Based in Asia-Pacific (UTC+8).