Louis Wen
Full-Stack Engineer
Summary
Full-stack engineer with 9+ years of experience building automation platforms, internal tools, and operational systems end-to-end across teams in Taiwan and Japan. I specialize in turning complex workflows into practical software — from self-service infrastructure and monitoring platforms to domain-specific tools that reduce manual work and support day-to-day operations.
Experience
Lead Software Engineer
Nov 2024 — PresentSystem Design— Full-stack hotel pricing automation platform across scraping, batch, and monitoring
Full-Stack— Owned the whole lifecycle — infra (GKE/Terraform), backend, frontend, testing, GitOps
Tech Lead— Mentored junior engineers, code reviews, production stability
- Architected and delivered a full-stack hotel pricing automation platform for dynamic multi-channel pricing operations, integrating scraping, batch workflows, pricing rules, and real-time monitoring.
- Owned the full software lifecycle from infrastructure to application delivery, including GKE/Terraform provisioning, backend services, frontend administration tools, automated testing, and GitOps-based deployment pipelines.
- Built core platform components across the stack, including a Python scraping pipeline with job orchestration, a Spring Boot pricing engine with batch publishing and Redis-based locking, and a React admin dashboard with real-time monitoring.
- Mentored junior engineers and supported production stability through code reviews, issue resolution, and operational improvements.
Related Projects
JavaPythonReactTypeScriptSpring BootFastAPIPlaywrightMySQLRedisGKETerraformDockerArgoCDGitHub ActionsRabbitMQ
Software Engineer
Sep 2022 — PresentFreelance·Remote — Taiwan & Japan
Full-Stack— APIs and frontend work for Yahoo and UooD e-commerce teams
Self-Initiated— Internal tooling, automation, and real-time systems on the side
- Contributed to supplier portal development for Yahoo by building functional pages and improving reliability through unit and end-to-end testing.
- Built APIs and frontend applications for UooD’s e-commerce platform, collaborating remotely with Japanese and Taiwanese teams on requirements and delivery.
- Delivered additional freelance and self-initiated projects across internal tooling, automation, and real-time systems.
- Bridged communication between Japanese and Taiwanese stakeholders to align requirements, execution, and delivery expectations across distributed teams.
ReactNext.jsNestJSNode.jsGolangPythonJavaDockerMQTTCodeceptJSMochaJinja2Shell
Application Development Consultant
May 2022 — May 2023Client Engagement— Embedded with the architecture team of a major insurance client
Automation— Ansible Automation Platform POC + Jenkins pipeline provisioning
Modernization— Legacy Java upgrades and vulnerability remediation
- Supported the architecture team of a major insurance client, focusing on vulnerability remediation, automation, and legacy system modernization.
- Implemented an Ansible Automation Platform POC with observability and access control integration to validate technical feasibility and operational readiness.
- Automated Jenkins pipeline provisioning for new projects using Jenkins APIs, Ansible, and Ansible Tower, reducing manual setup effort and standardizing container-based deployments across environments.
- Modernized legacy Java systems by upgrading runtime versions, remediating vulnerability scan findings, and resolving compatibility issues caused by deprecated libraries and version inconsistencies.
Related Projects
Ansible Automation PlatformAnsibleJenkinsDockerJavaELKGrafanaLDAPCheckmarx
Cloud Engineer / Tech Lead
Mar 2020 — May 2022Client-Facing Lead— Requirements, on-site delivery, POC execution, team coordination
Full-Stack— Technology Standard Platform frontend + internal Ansible Portal
Lecturer— 6-part Ansible training series (9+ hours) with hands-on labs
- Took on client-facing lead responsibilities across requirement discussions, on-site delivery, POC execution, and team coordination, while contributing hands-on to platform development.
- Led frontend development and delivery coordination for the Technology Standard Platform, focusing on maintainable UI architecture and cross-team execution.
- Built and maintained automation and internal platform solutions, including Ansible-based workflows for OpenShift operations and end-to-end development of an internal Ansible Portal.
- Designed and delivered a 6-part Ansible training series (9+ hours), including course materials and hands-on labs, to support onboarding and automation adoption.
Related Projects
ReactNode.jsJavaAnsibleOpenShiftDockerAzure
Working Holiday
Japan
Aug 2016 — Jul 2018
VBAPython
Mandatory Military Service
Taiwan
Skills & Technologies
Backend
JavaSpring BootSpring CloudSpring Data JPAPythonFastAPINestJSNode.jsExpressGo
Frontend
ReactTypeScriptNext.jsViteVue.jsTailwind CSSstyled-componentsRecharts
Database
MySQLPostgreSQLMongoDBMariaDBRedisElasticsearch
Infrastructure
DockerKubernetesOpenShift (OCP)GKETerraformArgoCDGitHub ActionsJenkinsAnsible TowerNginx
IoT / Messaging
MQTTRabbitMQLINE Messaging APIServer-Sent Events
Testing & Automation
PlaywrightJUnitMockitoPytestVitestCodeceptJSMocha
Automation & Tools
AnsibleJinja2Ansible Vaultansible-lintELKGrafana
AI & LLM
MCPFastMCPOpenAI API
Education
B.B.A., Industrial Engineering and Management
2011 — 2015Minghsin University of Science and Technology
Certifications & Learning
- EC-Council — Certified Ethical Hacker (CEH)
- Red Hat — RHCSA
- AWS — Cloud Quest: Cloud Practitioner
Languages
Chinese — Native
Japanese — Full Professional (JLPT N1)
English — Intermediate