tonynguyen192

Owned reliability and connection lifecycle for a long-running Rust/Tokio bandwidth-sharing daemon serving hundreds of distributed client connections under sustained production traffic. Designed per-peer health checks and active connection probes to monitor network state, improve connection availability, and support stable partner connections under unreliable network conditions. Improved production observability with structured logging around traffic flow, node health, connection lifecycle, and service behavior, reducing time-to-diagnose reliability issues. Designed and implemented a SOCKS5 proxy pipeline over QUIC/TCP for concurrent peer connections, with efficient forwarding and recovery under unstable network conditions.

Designed and shipped a multi-stage warehouse transfer workflow from scratch, covering internal transfers, external dispatch, verification, and operational handoff between teams. Reduced operational risk by introducing barcode-level traceability across packing, verification, dispatch, and audit workflows. Built backend APIs and admin surfaces that consolidated transfer monitoring, access control, and cross-workflow visibility into a single operational view. Structured the system around department-scoped boundaries, allowing warehouse teams to operate independently and reducing cross-team bottlenecks.

Delivered backend features across fintech, e-commerce, and livestreaming projects, adapting quickly to different codebases and business domains. Built and maintained backend APIs with frontend teams to deliver end-to-end client requirements. Investigated and fixed production issues across live systems, contributing to stable releases and fewer recurring bugs.

Joined as an early engineer on TryMe, contributing to core backend services from initial development to production operation. Built customer-facing APIs and asynchronous workflows while supporting rapid product iteration and changing requirements. Maintained production stability through bug fixing, refactoring, and release support.