I implement SRE, Observability, and performance testing practices from scratch. I advocate for the "everything is a dashboard" and "load as a service" approaches.Significant achievements in SRE:Developed a criticality assessment methodology for a major e-commerce platform.This methodology formed the basis for a successfully implemented error budget.Played a key role in designing the architecture of a multi-data center and sharded architecture.Established and successfully implemented a postmortem process.Managed campaigns preparing for peak seasons.Achievements in Observability:Successfully implemented OpenTelemetry for tracing with Grafana Tempo, replacing Elasticsearch APM.Actively used eBPF in monitoring, achieving cost-effective and high-quality results, exemplified by Coroot.Transitioned the company from Prometheus to VictoriaMetrics, increasing metric resilience by 12 times and saving threefold on resources.Achievements in Performance Testing:Implemented a "load as a service" approach.Automated all performance testing processes and transitioned them to "as a code."Developed a proprietary framework based on Java JMeter DSL.Built and implemented a concept of quality gates, automating result verification before production deployment.Addressed the issue of long-standing dynamic stands and data convergence with production by using a copy-on-write filesystem, allowing instant stand setup with data.