Hello World: The Site Is Live
My very first blog post, documenting how this site went from zero to launch.
Jiaqi Yang
Big Data Expert · Risk Control
10+ years in big data & distributed systems, 5+ years in risk control. Focused on real-time graph tech and loss-rate governance — cut subsidy loss rate from 10% to under 1%.
At a glance
10+
yrs · Big Data / Distributed
5+
yrs · Risk Control
<1%
Subsidy loss rate
PB+
scale cluster experience
Focus Areas
01
Real-time Graph
Self-built graph storage & query on HBase / HugeGraph; k-hop subgraph P99 ≤ 100ms for real-time risk decisions.
02
Risk Control
Graph strategies & features for brush / fake-order / content-safety / order-switching risks; cut annual loss rate below 1%.
03
Real-time / Batch Warehouse
Flink + Kafka real-time graph feature pipelines; Spark offline full-graph mining across onboarding & coupon risk.
04
OLAP Engine
Druid / ClickHouse / Doris real-time BI engine; PB-scale clusters powering company-wide dashboards.
Latest posts
See all →From Zero to Live with WorkBuddy: A Full Retrospective
A review of building this personal site with WorkBuddy (Ardot design + Astro + Giscus + GitHub Pages), and a reusable methodology and Skill distilled from it.
A Complete Log of Building a Personal Site with Astro
The full flow from project init to GitHub Pages deployment, including the pitfalls along the way.