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Hi, I’m Siou-Jhih Guo, a Site Reliability Engineer and Software Engineer focused on building scalable, reliable systems in the cloud. I design automation, manage large Kubernetes estates, and drive performance improvements across distributed platforms. My work combines software development with operations to reduce toil and accelerate delivery. I enjoy writing and sharing knowledge through Medium (Hallblazzar). When I’m not solving infrastructure puzzles, I explore new tech such as AI, data pipelines, and cloud-native tooling, and I love turning complex ideas into practical tools that help teams work smarter.…Hi, I’m Siou-Jhih Guo, a Site Reliability Engineer and Software Engineer focused on building scalable, reliable systems in the cloud. I design automation, manage large Kubernetes estates, and drive performance improvements across distributed platforms. My work combines software development with operations to reduce toil and accelerate delivery. I enjoy writing and sharing knowledge through Medium (Hallblazzar). When I’m not solving infrastructure puzzles, I explore new tech such as AI, data pipelines, and cloud-native tooling, and I love turning complex ideas into practical tools that help teams work smarter.

Siou-Jhih Guo

Cloud Developer, Full Stack Developer, Back-End Developer, +1

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Hi, I’m Siou-Jhih Guo, a Site Reliability Engineer and Software Engineer focused on building scalable, reliable systems in the cloud. I design automation, manage large Kubernetes estates, and drive performance improvements across distributed platforms. My work combines software development with operations to reduce toil and accelerate delivery. I enjoy writing and sharing knowledge through Medium (Hallblazzar). When I’m not solving infrastructure puzzles, I explore new tech such as AI, data pipelines, and cloud-native tooling, and I love turning complex ideas into practical tools that help teams work smarter.…Hi, I’m Siou-Jhih Guo, a Site Reliability Engineer and Software Engineer focused on building scalable, reliable systems in the cloud. I design automation, manage large Kubernetes estates, and drive performance improvements across distributed platforms. My work combines software development with operations to reduce toil and accelerate delivery. I enjoy writing and sharing knowledge through Medium (Hallblazzar). When I’m not solving infrastructure puzzles, I explore new tech such as AI, data pipelines, and cloud-native tooling, and I love turning complex ideas into practical tools that help teams work smarter.

Available to hire

Hi, I’m Siou-Jhih Guo, a Site Reliability Engineer and Software Engineer focused on building scalable, reliable systems in the cloud. I design automation, manage large Kubernetes estates, and drive performance improvements across distributed platforms. My work combines software development with operations to reduce toil and accelerate delivery.

I enjoy writing and sharing knowledge through Medium (Hallblazzar). When I’m not solving infrastructure puzzles, I explore new tech such as AI, data pipelines, and cloud-native tooling, and I love turning complex ideas into practical tools that help teams work smarter.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Intermediate

Work Experience

Software Engineer at Microsoft

June 1, 2024 - Present

Designed and implemented tools (Go, shell scripts, Ansible) for managing 100,000+ Kubernetes clusters as AKS control plane infrastructure. Mapped a migration of AKS control plane CNI from Canal to Cilium with 0 downtime and minimal workload impact. Implemented a customized Local DNS solution on clusters (iptables, route table, CoreDNS) to cut Kubernetes DNS query traffic by 30–70% and prevent CONNTRACK exhaustion. Migrated cluster VM images from Azure Linux 2 to 3 and collaborated across teams to keep all K8s components up-to-date, aligning with security requirements and future compliance.

Software Engineer at Microsoft

August 1, 2023 - June 1, 2024

Internal translation system developer. Migrated the translation system from .NET 4.5 to .NET 6 and Azure Functions to improve extensibility and throughput. Standardized a unit test framework using MSTest data-driven attributes to reduce development time and code duplication. Designed routing with Azure Front Door and Key Vault for SSL certificates and migrated CI/CD pipelines from legacy ADO configurations to YAML-based pipelines to improve security and reduce boilerplate.

Site Reliability Engineer at Microsoft

November 1, 2022 - July 1, 2023

Operated internal translation system processing 10,000,000 translation requests per day. Troubleshot and fixed issues to reduce problem response time by 15–40%. Built automation for log/metrics collection using Microsoft PowerAutomation and PowerShell, reducing human intervention by 10–50%. Designed and analyzed metrics to help SREs and SWEs detect issues earlier, cutting issue-detection time by 10–60%.

DevOps Engineer at Yellobrick Data

October 1, 2021 - November 1, 2022

Worked on pipeline/tools for a cloud-native data lake product (AWS/Azure/GCP-based) used by 100+ partners. Implemented CI/CD pipelines (Jenkins-based; Python/Bash, Terraform, Ansible) to automate build/test/deploy, saving 20–30% of developer/ops time. Replaced legacy logging with Loki/Grafana/K8s-based solution, saving 50–70% time for log collection/analysis and reducing bug-fix time by ~40%. Built a Python client library/CLI for programmatic interaction with the cloud product (30–80% time saved on infra management). Created a Django-based metrics backend with Grafana dashboards and a Slackbot for cost notifications, cutting cloud-related costs by 5–15%. Implemented M2M auth using AWS Secrets Manager and Nginx to secure internal tools beyond VPN scope.

Cloud Support Engineer at Amazon Web Services (AWS) EMEA SARL (Irish Branch)

May 1, 2021 - August 1, 2021

Built the Mandarin Support team in Ireland from scratch, reducing on-call workload for engineers in Taipei and the SEA region by ~30%. Developed internal Django/Nginx/MySQL/ECS tools, reducing 30–40% of workload for managers and engineers.

Cloud Support Engineer at Amazon Web Services (AWS) Taiwan

August 1, 2019 - April 1, 2021

Provided support for container and deployment-related AWS services (ECS, EKS, App Mesh, Code series, CloudFormation, CDK, X-Ray, AWS Batch). Resolved 1,000+ customer questions, achieving 20–60% time savings for users and 15–40% time savings for internal teams on related issues.

Software Engineer at IChen Corp.

September 1, 2015 - February 1, 2017

Core service engineer for B2C retailer automation systems. Built self-serve parking/pay-by-license-plate system (used by 10,000+ spaces), a FreeSwitch-based VoIP intercom solution for parking lots, and self-serve restaurant ordering/payments. Managed infrastructure (GCP/OpenVPN) and CI/CD (GitLab/Ansible), reducing IT costs, downtime, and release times.

Teaching Assistant at Tamkang University (TKU)

January 1, 2017 - January 1, 2019

Supported Spark cluster management and Hadoop/HDP-based research infrastructure for students and faculty, contributing to data-analytic-related studies.

Private Cloud Maintainer at Tamkang University (TKU)

August 1, 2013 - June 1, 2016

Constructed an OpenStack (Kilo) based private cloud to replace VMware-based virtualization, reducing IT costs by 50%.

Founder & Writer at Medium

March 1, 2018 - Present

Founder of Hallblazzar’s Developer’s Journal. Published articles and research including work on candlestick chart analysis and neural approaches to forecasting price movements; contributions presented at IJAHUC, PAAP’18, and IDAA 2018 conferences.