Author Image

Hi, I am Clarence

Taking backend, AI, and infrastructure from code to reliable production

Clarence

Senior Backend Developer / LLM & Infrastructure Engineer at BRONCI TECHNOLOGY INC.

I work across backend development, DevOps, Linux, cloud architecture, and infrastructure security, treating backend, AI applications, cloud, on-prem infrastructure, networking, and security as one delivery chain. My work goes beyond feature completion: services need to be reliably deployed, observable, and maintainable.

My experience at BRONCI Technology Inc. includes backend services and APIs, GitLab CI/CD, GitHub Actions, AWS CDK / IaC, automated testing with Jest, and cloud platforms across AWS, GCP, and Azure. My AI work includes Kaldi, Whisper, OpenAI APIs, Ollama, LLM applications, and GPU runtimes.

My infrastructure work covers cloud and on-prem platforms, Proxmox VE and Proxmox Backup Server (PBS), Harbor, LibreNMS, LDAP, enterprise wired and Wi-Fi networks, VPN / SD-WAN, and equipment selection and infrastructure procurement planning.

I am also the author of AWS CDK 完全學習手冊, and I turn engineering problems, solutions, and practical experience into technical articles, notes, and open-source projects.

Resume How I work Selected work Technical notes Technical blog Work with me
4,000+ sites operated Standardized operations at hosting scale
19M requests in 30 days A public high-traffic hosting case
Backend → Infra cross-layer delivery API, AI, deployment, and networking
AWS CDK book author IaC practice turned into learning material

Selected Public Work

  1. iThome Ironman DevOps Champion 12th iThome Ironman series, “用 CDK 定義 AWS 架構”
  2. AWS Training at 5xRuby 12 hours of cloud deployment instruction and hands-on practice
  3. BNext Author Backend, DevOps, Linux, cloud architecture, and security

Certifications & Credentials

Only verifiable issuer badges are shown as images. Legacy credentials without official artwork are presented through their names and demonstrated skills.

Projects

Selected work spanning backend, AI, delivery systems, and infrastructure operations.

LLM Text Summarization Platform

Builder 2022 - Present

Internal text summarization and AI application platform integrating OpenAI API, Ollama, local models, and batch processing with an emphasis on controlled, maintainable model usage.

ai llm python

Speech AI and GPU Runtime

Builder / Operator 2022 - Present

Kaldi, Whisper, and GPU runtime integration for speech recognition, model inference, deployment, and operational maintenance.

ai gpu infrastructure

Self-hosted GitLab, Runner and Harbor

Operator 2022 - Present

Self-hosted GitLab, GitLab Runner, Harbor registry, and CI/CD operations that connect source code, container images, and deployment workflows.

devops gitlab docker

Proxmox VE / PBS Infrastructure

Operator 2023 - Present

Proxmox VE, Proxmox Backup Server, GPU servers, and on-prem infrastructure for internal services, AI runtime workloads, and backup strategy.

devops network infrastructure

High-traffic Web Hosting Operations

Operator 2023 - Present

Long-running operation of high-traffic web hosting, including monitoring, updates, capacity planning, and security maintenance.

network devops
Details

cdk-wordpress

Owner Oct 2020 - Sep 2024

An AWS CDK construct library for repeatable WordPress deployment as infrastructure code.

cdk construct
Star

View all public projects

Experiences

The complete timeline covers employment, consulting, teaching, authorship, and community work; the current role includes both a concise scope and full responsibilities.

1

BRONCI Technology Inc.

11 2020 - Present

Taipei

Cloud software development, cloud architecture, and system automation deployment, covering various advanced technologies applied across multiple business areas.

Senior Backend Developer / LLM Engineer

11 2020 - Present

Role scope

  • Design and build backend services, APIs, background jobs, and third-party integrations.
  • Bring LLM, OpenAI / Ollama, Kaldi / Whisper, and GPU runtimes into maintainable workflows.
  • Build repeatable cloud architecture with AWS CDK and infrastructure as code.
  • Maintain GitLab CI/CD, GitHub Actions, automated tests, and container delivery.
  • Operate Linux, Proxmox VE / PBS, Harbor, monitoring, and on-prem infrastructure.
  • Plan enterprise networks across VLAN, VPN, firewalls, Wi-Fi, and SD-WAN.

Full responsibilities

  • Build backend services, APIs, background jobs, and internal tools with Node.js, Python, Go, C/C++, Shell Script, Java, PostgreSQL, MySQL, and Docker.
  • Design APIs, background jobs, data processing flows, and third-party service integrations.
  • Integrate Japanese home camera cloud services for remote monitoring and device-management scenarios.
  • Develop Japanese IoT smart-home voice command services.
  • Develop Taiwan home-appliance voice-control solutions across devices, cloud services, and voice workflows.
  • Maintain Jest automated tests and regression checks so backend releases remain repeatable.
  • Work on LLM applications, tool calling, agent workflows, and production integration since 2022.
  • Integrate OpenAI API, Ollama, and internal AI workflows for product and operations use cases.
  • Integrate Kaldi and Whisper speech recognition for ASR, transcription, and model deployment.
  • Operate NVIDIA GPU servers, drivers, runtimes, inference environments, and system tuning.
  • Design AWS architecture across availability, scalability, networking, and deployment paths.
  • Use AWS CDK and Infrastructure as Code to manage repeatable cloud resources.
  • Connect AWS, GCP, Azure, and on-prem services so cloud and self-hosted systems work together.
  • Maintain GitLab CI/CD, GitHub Actions, container image builds, and deployment workflows.
  • Manage on-prem, cloud, and physical data-center environments, including hardware maintenance and capacity planning.
  • Design and operate Proxmox VE clusters, virtualization, storage, and VM lifecycle.
  • Deploy Proxmox Backup Server for backup, restore, and disaster recovery workflows.
  • Deploy and maintain Harbor private registry, GitLab, LDAP, and related internal platforms.
  • Plan office and enterprise wired networks, VLANs, routing, firewall policy, and switching.
  • Manage SD-WAN distributed networks for cross-site connectivity, performance, and security.
  • Deploy Aruba and UniFi Wi-Fi for office wireless coverage, roaming, and operations.
  • Use LibreNMS for network/server monitoring, alerting, and issue detection.
  • Plan internal and external data-center paths for site-to-site backup and high availability.
  • Evaluate Dell, HP, Supermicro server hardware and GPU server specifications.
  • Evaluate network equipment such as switches, firewalls, and wireless APs.
  • Compare vendor quotes and turn technical requirements into maintainable purchase specifications.

CyberCube - Taipei Office

2024 - 2024

Taipei

Network Planning and Setup

2024 - 2024

Responsibilities:

  • Network planning and setup
2
3

CyberCube - Taipei Flagship Store

2024 - 2024

Taipei

Network Planning and Setup

2024 - 2024

Responsibilities:

  • Network planning and setup

CyberCube - Taichung Flagship Store

2024 - 2024

Taichung

Network Planning and Setup

2024 - 2024

Responsibilities:

  • Network planning and setup
4
5

CyberCube - Kaohsiung Flagship Store

2024 - 2024

Kaohsiung

Network Planning and Setup

2024 - 2024

Responsibilities:

  • Network planning and setup

Business Next Media Corp.

06 2022 - Present

Author

Author

06 2022 - Present

6
7

5xRuby CO.

2022 - 2022

lecturer

Education training instructor

2022 - 2022

AWS User Group Taiwan

12 2021 - 12 2021

lecturer

lecturer

12 2021 - 12 2021

Responsibilities:

8
9

DrMaster Press Co., Ltd.

11 2021 - Present

Author

AWS CDK 完全學習手冊：打造雲端基礎架構程式碼 IaC（iT邦幫忙鐵人賽系列書） · View print and eBook retailers

Book author

11 2021 - Present

Responsibilities:

  • The first Chinese book that teaches you to write AWS CDK from scratch!
  • For those of you who don’t know how to write, we will provide you with super rich Sample Code, and you can also become an AWS CDK expert by copying!

National Taipei University of Technology, Taipei Tech

11 2015 - 11 2020

R & D alternative service

Research and develop cloud system programs

Full-time assistant of special research project

11 2015 - 11 2020

Responsibilities:

  • Web development - Node.js, Go, C/C++, PostgreSQL
  • Backend program development - Node.js, PostgreSQL, Docker
10
11

National Taipei University of Technology, Taipei Tech

06 2012 - 06 2017

Computer and Information Network Center

Deal with network problems or computer repairs

Part-time worker

06 2012 - 06 2017

Responsibilities:

  • Network Basics Debugging and Tracking with Fluke
  • Computer system maintenance

Students' Information Technology Conference

2014 - 2018

Volunteer

Public annual-conference staff records verified through SITCON Credits

SITCON 2018 Video Engineering Team Member

2018 - 2018

SITCON 2017 Marketing Team Member

2017 - 2017

SITCON 2016 Administration Ticketing and Marketing Team Member

2016 - 2016

SITCON 2015 Marketing Deputy Lead

2015 - 2015

SITCON 2014 Venue Team Member

2014 - 2014

12
13

COSCUP

2014 - 2014

Volunteer

COSCUP 2014 - Venue Services Group

2014 - 2014

Students' Information Technology Conference Summer Camp

2014 - 2015

Volunteer

Public camp staff records verified through SITCON Credits

SITCON Summer Camp 2015 - Deputy Convenor

2015 - 2015

SITCON Summer Camp 2014 - Curriculum Team Lead

2014 - 2014

14
15

Hacks In Taiwan Conference (HITCON)

2014 - 2014

Volunteer

HITCON 2014 Motorized group - Leader

2014 - 2014

Publications

Official bibliographic details and retailer links for the print, PDF, and EPUB editions. Every link below was matched by title or ISBN.

Links reviewed on 2026-07-11

DrMaster Press

AWS CDK 完全學習手冊：打造雲端基礎架構程式碼 IaC（iT邦幫忙鐵人賽系列書）

  • Paperback ISBN 978-986-434-920-3
  • PDF PDF ISBN 978-986-434-985-2
  • EPUB EPUB ISBN 978-986-434-993-7
A Traditional Chinese, example-led guide to building Infrastructure as Code with TypeScript and AWS CDK, covering Serverless, static sites, LAMP, ECS, EKS, and Construct Library development.

Print retailers

8

eBook platforms

12
AWS CDKInfrastructure as CodeTypeScript

Skills

The complete inventory spans cloud platforms, programming languages, AI, DevOps, databases, systems, and enterprise networking. Primary capabilities appear first, and every item remains filterable.

31 skills

Node.js Primary

Primary backend development language, developing server-side applications, API services, and web applications with Node.js. Provides non-blocking, event-driven programming environment.

Python Primary

Primarily used for LLM development, automated script development, and AI-related application development.

CI/CD Primary

Proficient in GitLab CI/CD and GitHub Actions, creating automated continuous integration and deployment processes, including automated testing (Jest), code quality checks, and deployment automation.

Large Language Models (LLM) Primary

Specialized in LLM control and development since 2022, primarily focused on text summarization applications, including model integration, optimization, and application development. Using Ollama for local model deployment.

Kaldi & Whisper Primary

Speech recognition and processing technology expert, integrating AI models like Kaldi and Whisper to provide enterprise-level voice solutions.

PostgreSQL Primary

Database design and management using PostgreSQL, including CRUD operations and performance optimization, providing reliable data storage services for API applications.

Proxmox VE Primary

Virtualization platform expert, using Proxmox VE for on-premises virtual machine data center setup, providing enterprise-level virtualization environment management, with PBS (Proxmox Backup Server) for backup management.

Network Management Primary

Enterprise network equipment management expert. Switches: Cisco, Juniper, HP, Netgear, Extreme Networks. Firewalls: Sophos, Fortinet. Wireless: UniFi, Aruba. Proficient in VLAN, VPN, SD-WAN, QoS, and STP/RSTP protocols.

AWS

Extensive use of AWS cloud services including EC2, RDS, Lambda, Route 53, ElastiCache, IAM, CloudWatch, ECR, ECS, ALB/ELB, VPC, CloudFormation, Auto Scaling, Certificate Manager, WAF, EBS, S3, Fargate, AppRunner, API Gateway, CloudFront and complete service ecosystem.

GCP

Using Google Cloud Platform services including VM, CDN, Load Balancer, MySQL for cloud architecture deployment.

Azure

Using Azure Virtual Machines (VM) for cloud architecture deployment.

Cloud Architecture

Design and operate repeatable cloud architectures across AWS, GCP, and Azure, covering IaC, networking, load balancing, availability, and security.

Go

High-performance web application and server software development using Go language, particularly suitable for concurrent processing and microservice architecture.

PHP

Developing API applications and backend websites using PHP, suitable for dynamic content generation and web application development.

LINE Platform

LINE Messaging API, LINE Bot, and webhook workflow integration for PHP / Node.js backend notifications and interactive services; LINE Notify is retained only as historical integration experience (the service ended on March 31, 2025).

Docker

Containerization expert, creating Docker containerization solutions, packaging applications and dependencies into portable containers, ensuring cross-environment consistency and efficient deployment.

Git

Version control expert, using Git for team collaboration development, effectively tracking and managing code changes.

GitHub

Proficient with GitHub platform for open source collaboration, Pull Request reviews, Issues management, and GitHub Actions automation.

OpenAI API

Deep integration of OpenAI API for developing innovative AI-driven solutions and applications, particularly specialized in text processing and summarization functions.

GPU Computing

NVIDIA GPU server deployment and management, supporting AI model training and inference. Experienced in CUDA environment configuration.

MySQL

MySQL database management and optimization, providing efficient data storage and retrieval services for API websites and applications.

Redis

In-memory cache database for improving application performance, implementing high-speed data access and session management.

Linux

Linux system administration expert, proficient in server installation, configuration, network setup, command-line operations, and Shell Script development, primarily using Ubuntu distribution.

Network Security

Network security expert, configuring firewall rules, IPS/IDS, VPN (OpenVPN, L2TP), SSL/TLS security mechanisms to ensure network environment security.

LibreNMS

Network monitoring system expert, using LibreNMS for network equipment monitoring, timely detection and resolution of network issues.

Ansible

Automated configuration management tool for large-scale server deployment and configuration management automation.

Vue.js

Frontend development framework, using Vue.js for basic frontend web development, building modern user interfaces.

WordPress

Historical experience deploying and maintaining WordPress, including maintaining the cdk-wordpress AWS CDK Construct Library from 2020 to 2024 to package common WordPress architecture as repeatable IaC.

Nginx

Web server and reverse proxy server configuration and management for load balancing and high-performance web service deployment.

Homelab

Self-built personal lab environment for technical research, testing, and continuous learning. Includes Proxmox VE virtualization platform, NAS storage systems, and enterprise-grade network equipment to simulate real enterprise architectures for technology validation.

Education

Certifications & Credentials

I earned every certification and credential listed below by completing the required assessments. Each entry explains the practical knowledge and skills demonstrated, showing the breadth of my technical foundation.

Professional & Digital Skills

Credentials I earned across national technical skills, network security, digital literacy, and applied IT, organized by the capabilities they demonstrate.
Earned Hardware & Networking

National Technician｜Hardware & Networking

Workforce Development Agency, Ministry of Labor
Passed Taiwan’s Computer Hardware Maintenance Class B, Computer Hardware Maintenance Class C, and Network Installation Class C skill tests. Demonstrates hands-on ability in PC and peripheral diagnostics and repair, hardware assembly, system installation, network cabling, and network-component setup.
Hardware standard Network standard
Earned Software & Web

National Technician｜Software & Web

Workforce Development Agency, Ministry of Labor
Passed Taiwan’s Computer Software Applications, Computer Software Design, and Web Design Class C skill tests. Demonstrates proficiency with productivity tools, basic programming and testing, technical documentation, and website creation, publishing, administration, and maintenance.
Software applications Software design Web design
Earned Network Security

Fortinet NSE 1 + NSE 2

Network Security Associate

Fortinet Training Institute
Completed and passed the NSE 1 and NSE 2 assessments, earning both credentials. Demonstrates foundational knowledge of cyberthreats, safe online behavior, major security-product categories, and the role of Fortinet solutions.
Official program guide Fortinet Training
Earned Digital Literacy

IC3 Digital Literacy

Computing Fundamentals · Key Applications · Living Online

Certiport, a Pearson VUE business
Passed the Computing Fundamentals, Key Applications, and Living Online assessments and earned all three component badges. Demonstrates digital literacy across computing fundamentals, productivity tools, online collaboration, information evaluation, and online safety.
Computing Fundamentals Key Applications Living Online
Earned Applied IT

TQC Information-Technology Credentials

Internet & Mobile Communication · HTML 4.01 · Windows Mobile 6

Computer Skills Foundation
Passed and earned the Internet and Mobile Communication, Web Markup Language HTML 4.01, and Windows Mobile 6 Device OS Applications credentials. Demonstrates practical skill in online communication and security, HTML document structure, and mobile-device configuration and data handling.
Internet & mobile communication Official HTML sample Windows Mobile 6 scope

Microsoft Office 2007 Master

Passed all four MCAS exams - Word, Excel, PowerPoint, and Outlook - and earned the Microsoft Office 2007 Master credential. Together they demonstrate end-to-end Office proficiency across documents, data, presentations, email, and scheduling.
Official Master credential FAQ
Earned Word Processing

Word 2007

77-601

Microsoft Certified Application Specialist

Microsoft / Certiport
Passed exam 77-601 and earned the Word 2007 credential. Demonstrates document creation, editing, formatting, page layout, and publication-ready output.
Earned Spreadsheets & Data Analysis

Excel 2007

77-602

Microsoft Certified Application Specialist

Microsoft / Certiport
Passed exam 77-602 and earned the Excel 2007 credential. Demonstrates worksheet design, formulas and functions, data organization, and charting.
Earned Presentation Design

PowerPoint 2007

77-603

Microsoft Certified Application Specialist

Microsoft / Certiport
Passed exam 77-603 and earned the PowerPoint 2007 credential. Demonstrates presentation structure, visual design, animation, and delivery-ready output.
Earned Email & Scheduling

Outlook 2007

77-604

Microsoft Certified Application Specialist

Microsoft / Certiport
Passed exam 77-604 and earned the Outlook 2007 credential. Demonstrates integrated management of email, contacts, calendars, meetings, and tasks.

Adobe Certified Associate CS3

Passed the Dreamweaver CS3, Flash CS3, and Photoshop CS3 Extended exams and earned three Adobe Certified Associate credentials. Together they demonstrate capability in web authoring, interactive media, and visual communication.
Official credential FAQ
Earned Web Authoring

Dreamweaver CS3

Adobe Certified Associate · Web Communication

Adobe / Certiport
Passed the Dreamweaver CS3 certification exam and earned the ACA credential. Demonstrates website requirements analysis, layout planning, content production, evaluation, and maintenance.
Earned Interactive Media

Flash CS3

Adobe Certified Associate · Rich Media Communication

Adobe / Certiport
Passed the Flash CS3 certification exam and earned the ACA credential. Demonstrates multimedia requirements analysis, interactive design, content production, and project evaluation.
Earned Visual Design

Photoshop CS3 Extended

Adobe Certified Associate · Visual Communication

Adobe / Certiport
Passed the Photoshop CS3 Extended certification exam and earned the ACA credential. Demonstrates image-project requirements analysis, visual design, image editing, and finished-work evaluation.