WJ
Professional Summary
Senior Software Engineer with 10+ years of experience across platform engineering, cloud-native infrastructure, distributed systems, observability, authentication platforms, and full-stack development.
Experienced designing, deploying, and troubleshooting enterprise platforms with Kubernetes, Docker, OpenTelemetry, PostgreSQL, OAuth2/OIDC, and Active Directory.
Proven ability to work across application, infrastructure, networking, authentication, and operations domains to improve reliability, scalability, and developer productivity.
Highlights
- Platform engineering: build and operate local, VM-based, containerized, and Kubernetes (K3s, Helm, MetalLB, Traefik) deployment environments for enterprise HPC platforms.
- Performance engineering: design and run Locust scalability testing from hundreds to 2,000 concurrent users, identifying bottlenecks across PostgreSQL, NATS, authentication, WebSocket, and storage services.
- Observability & distributed tracing: build centralized logging (Grafana, Loki, Promtail) and distributed tracing (OpenTelemetry, Grafana Tempo) with log-to-trace correlation across Java, Spring Boot, and NGINX workloads.
- Authentication & authorization: deep OAuth2/OIDC experience integrating Dex, OAuth2 Proxy, Casbin, GitHub authentication, and Active Directory synchronization.
- Distributed systems & production troubleshooting: root-cause analysis across application, infrastructure, networking, and OS layers (Linux PAM, systemd, cgroup, SSH, Go race conditions).
- Full-stack development: React/Next.js front-ends and reusable component libraries (Storybook, Vite), with Scala, Spring Boot, and Node.js back-ends.
- CI/CD & DevOps: GitHub/GitLab Actions and Jenkins pipelines for automated build, test, and deployment.
- Strong computer-science fundamentals and professional working English proficiency.