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%-------------------------------------------
%%%%%%  CV STARTS HERE  %%%%%%%%%%%%%%%%%%%%%%%%%%%%


\begin{document}

%----------HEADING-----------------
\begin{tabular*}{\textwidth}{l@{\extracolsep{\fill}}r}
  \textbf{{\Large Rock Liang}} & Email : \href{mailto:rock@riotpiao.com}{rock@riotpiao.com}\\
   & Portfolio : \href{https://riotpiao.com}{riotpiao.com}\\
\end{tabular*}


%-----------Professional Summary-----------------
\section{Professional Summary}
 \resumeItemListStart
      \resumeItem{Experience}
          {6+ years building scalable infrastructure, backend systems, and LLM-powered applications. Expertise in Kubernetes orchestration, Infrastructure-as-Code (Terraform), distributed systems design, and cloud-native architecture at AWS scale.}
          \resumeItem{Core Competencies}
          {Production Kubernetes (Talos, GitOps/ArgoCD), Terraform IaC, AWS distributed systems, Golang backend services, observability (Prometheus/Grafana), message queuing (Kafka/Temporal workflows), GPU inference (vLLM), zero-trust networking (OIDC/RBAC).}
        \resumeItem{Strengths}
          {Owning systems end-to-end—from design doc through oncall. Building fault-tolerant platforms. Unblocking teams with clear technical communication. 99.2% automation mindset.}
         
      \resumeItemListEnd


%-----------EXPERIENCE-----------------
\section{Experience}
  \resumeSubHeadingListStart

    \resumeSubheading
      {Self-Hosted Production (riotpiao.com)}{Home Lab}
      {DevOps / SRE / SDE}{May 2025 — Present}
     
      \resumeItemListStart
        \resumeItem{Challenge \& Solution}
          {Built AWS from scratch at home on bare-metal Kubernetes—Talos Linux for secure OS, ArgoCD for GitOps pipeline automation, SOPS for encrypted secrets, cert-manager for PKI. Result: production-grade multi-tenant platform with Kafka, PostgreSQL, S3, GPU LLM inference, Temporal workflows in 4-node cluster.}
        \resumeItem{System Design}
          {Architected Authentik OIDC SSO with Kubernetes RBAC; Longhorn block storage + MinIO S3-compatible API; CloudNativePG with pgvector for embeddings; vLLM GPU inference (Qwen3-32B) with KServe orchestration. Tech: \textbf{Kubernetes, Talos, ArgoCD, Terraform, Authentik, Prometheus, Grafana, vLLM, Temporal, Kafka, PostgreSQL, Go}}
        \resumeItem{Observability \& Operations}
          {Implemented full observability stack: Prometheus metrics, Grafana dashboards, Loki log aggregation, Tempo traces, OpenTelemetry. 99.2\% uptime maintained across core services via monitoring automation and runbooks. Tech: \textbf{Prometheus, Grafana, Loki, Tempo, OpenTelemetry}}
        \resumeItem{Deployment Pipeline}
          {GitOps-driven Forgejo CI/CD with Docker container registry; DinD runners for parallel builds. Kustomize manifests + Terraform for declarative infrastructure. Tech: \textbf{Forgejo, Docker, Kustomize, Terraform}}
      \resumeItemListEnd

    \resumeSubheading
      {Royal Bank of Canada (RBC)}{Toronto, ON}
      {Lead Software Engineer}{Nov 2024 — May 2026}
      \resumeItemListStart
        \resumeItem{Challenge \& Solution}
          {Deployments were manual, blocking teams 2+ hours per release. Standardized on Terraform Cloud for idempotent IaC; built Temporal workflows for multi-cloud orchestration with built-in retry logic and idempotency keys. Reduced deploy time from 2 hours to 20 minutes, achieved 99.2\% automation.}
        \resumeItem{Drift Detection \& Reconciliation}
          {Built Kubernetes CronJob (Golang) to continuously detect and reconcile Terraform state drift against actual infrastructure. Automatically detects divergence and triggers remediation without manual operator intervention. Tech: \textbf{Golang, Kubernetes, Terraform, IaC}}
        \resumeItem{Slack Notifications \& SLA}
          {Designed Slack notification service with Golang workers to alert on apply failures and drift detection. Operators resolve issues in \textless 5 minutes via notification-driven workflow. Coordinated across 12 platform teams—unified 200+ microservices into single IaC standard. Tech: \textbf{Golang, Slack API, Distributed Systems}}
        \resumeItem{Stakeholder Alignment}
          {Led requirement gathering across 4 platform teams; translated technical decisions for non-technical stakeholders; secured buy-in for platform migration. Unblocked 3 stalled projects by disambiguating specs.}
      \resumeItemListEnd

    \resumeSubheading
      {Amazon Web Services (AWS)}{Seattle, WA}
      {Senior Software Engineer (Step Functions)}{2022 — 2024}   
      \resumeItemListStart
        \resumeItem{Challenge \& Solution}
          {Owned Distributed-Map from design doc to production launch across 57+ regions. Under tight deadline, introduced separate state in Map vs new functions—simplified customer adoption. Built checkpoint recovery for mid-workflow failures so customers resume without full re-run.}
        \resumeItem{Distributed Systems Engineering}
          {Solved critical edge cases: race conditions in concurrent updates, dependent service failures, message deduplication, exactly-once semantics. Introduced JSON state input for larger payloads—unlocked new customer use cases. Tech: \textbf{Java, DynamoDB, gRPC, Distributed Systems}}
        \resumeItem{Production Ownership \& Reliability}
          {Full oncall ownership—built CloudWatch dashboards, wrote operational runbooks, debugged production issues live. Achieved sub-100ms P99 latency across 57+ regions and 20x burst traffic scaling. Disaster recovery and incident response procedures. Tech: \textbf{Java, AWS, CloudWatch, Observability, Ownership}}
      \resumeItemListEnd

    \resumeSubheading
      {Netflix Titus (Container Orchestration)}{Los Gatos, CA}
      {Software Engineer Intern}{May — Aug 2019}   
      \resumeItemListStart
        \resumeItem{Challenge \& Solution}
          {Streamlined Personal Data Detection (PDD) to identify classified data exfiltration anomalies—achieved 97.8\% accuracy with minimal false positives. Built fault-tolerant Golang connector for PDD integration with 28\% p99 latency improvement over legacy implementation.}
        \resumeItem{Compilation \& Integration}
          {Re-integrated SmartRegex with CMake \& C++ on Linux/Unix platforms. Achieved 5x faster deployment through automated build pipeline and dependency resolution. Tech: \textbf{C++, CMake, Golang, Docker}}
        \resumeItem{Impact}
          {Prevented classified data leakage across Netflix's distributed workload platform. Improved SLA for data governance compliance teams.}
      \resumeItemListEnd

    \resumeSubheading
      {NAV Canada (Air Traffic Control Systems)}{Ottawa, ON}
      {Summer Student}{May — Aug 2018}   
      \resumeItemListStart
        \resumeItem{Challenge \& Solution}
          {Maintained enterprise CFPS web application in Agile development. Built Django NOTAMJ polls app to meet iteration goals. Improved deploy stability with Sonar code coverage analysis—reduced defect escape rate.}
        \resumeItem{Frontend \& User Experience}
          {Created FWGS weather briefing interface with ReactJS for Air Traffic Control. Real-time meteorological data visualization for pilot briefings. Tech: \textbf{ReactJS, Django, Agile, Sonar}}
        \resumeItem{Impact}
          {Improved ATC decision-making with cleaner weather briefing UX. Deployed to Canadian airspace (50+ airports).}
      \resumeItemListEnd

  \resumeSubHeadingListEnd

%--------PROGRAMMING SKILLS------------
\section{Technical Skills}
 \resumeSubHeadingListStart
   \item{\textbf{Languages}{: Golang, Java, Python, C++, JavaScript/TypeScript, SQL}}
   \item{\textbf{Cloud \& Infrastructure}{: Kubernetes (Talos Linux, k3s), Terraform, Docker, ArgoCD, AWS (DynamoDB, Step Functions, CloudWatch), OpenShift}}
   \item{\textbf{Distributed Systems}{: Temporal workflows, Kafka/Redpanda, gRPC, message queuing, exactly-once semantics, state management, disaster recovery}}
   \item{\textbf{LLM \& AI}{: vLLM (GPU inference), KServe, Ollama, TEI embeddings, vector databases (pgvector)}}
   \item{\textbf{Observability}{: Prometheus, Grafana, Loki, Tempo, OpenTelemetry, CloudWatch, alerting \& runbooks}}
   \item{\textbf{Networking \& Security}{: Authentik OIDC SSO, cert-manager TLS, RBAC, SOPS encryption, Cloudflare Tunnel (zero-trust), network policies}}
   \item{\textbf{Data}{: PostgreSQL, DynamoDB, MinIO S3, Longhorn storage, pgvector}}
   \item{\textbf{CI/CD}{: Forgejo Actions, GitHub Actions, Docker registry, Kustomize, GitOps}}
 \resumeSubHeadingListEnd

%-----------EDUCATION-----------------
\section{Education}
  \resumeSubHeadingListStart
    \resumeSubheading
      {University of Ottawa}{Ottawa, Ontario}
      {Master of Science in Computer Science (Software Systems)}{2020 — 2021}
    \resumeSubheading
      {University of Ottawa}{Ottawa, Ontario}
      {Bachelor of Science in Computer Science (Honours)}{2016 — 2020}
  \resumeSubHeadingListEnd

%-------------------------------------------
\end{document}