Built a distributed I/O-intensive open-source dependency mirror server from scratch using Golang, handling over 20 million download requests per day with an SLA of 99.99 %. Performed runtime analysis with pprof and addressed performance hotspots with lock-free programming and size-hierarchical memory pooling.

Developed an end-to-end solution for logging users’ operations into Kafka’s asynchronous messages, synchronizing the data to Elasticsearch with Python, and visualizing the data with Grafana.

Migrated 12 million artifacts to new storage using a dual-write mechanism with zero downtime.

Designed a high available cloud-native monitoring solution compatible with historical metric data.

Deployed components to collect, forward, and store monitoring data.

Created metric dashboards and provided data visualization for SRE and dev teams.

Performed chaos testing by simulating network failure and machine OOM.