Solution driven
I start from the real workflow before recommending the technical shape.
Senior Full-Stack Software Developer
Lee Yung Hang
Senior Full-Stack Software Developer
Solution-driven full-stack developer with two years of experience delivering enterprise systems, automation workflows, and startup platforms. I do not assume how a workflow works: I learn the process, ask the right questions, and offer a critical, practical review before building a solution that fits.
2+ yrsFull-stack development experience
5Client enterprise systems maintained
3Interns mentored and trained
Open to opportunities
Let's collaborate if you're committed to precision, efficiency, or technical excellence.
I believe systems should simplify life, not complicate it. My goal is to contribute to projects that solve real operational pain points through clean architecture and thoughtful discovery.
Honest communication
I keep tradeoffs visible so teams can make clear decisions early.
Teamwork
I build with handoff, support, and production operations in mind.
Process first
I review the process first, then turn the right parts into reliable systems.
Experience
Building systems around real operations.
Enterprise delivery, automation, architecture, and technical leadership.
Amaseng Software Sdn. Bhd.
Senior Full-Stack Software Developer
Progressed from Junior Developer to Senior Full-Stack Developer, contributing to enterprise systems and startup platforms across sales, purchasing, logistics, finance, and regulatory workflows.
System development & architecture
- Design and develop custom Sales Order, Purchase Order, Delivery Order, invoicing, reporting, and dashboard modules.
- Lead architecture and system-flow planning for two startup platforms with scalable, modular structures.
- Implement role-based access control and multi-department workflows, backed by MySQL and Microsoft SQL Server.
Delivery & integrations
- Maintain and enhance five client systems across Play Framework, Apache, Adobe Flex, React Native, Vue.js, and C#.
- Build secure Malaysia LHDN e-Invoice submission and validation integrations for client compliance.
- Meet clients, review requirements critically, distribute tasks, maintain timelines, and diagnose production issues.
Leadership
- Mentored three interns in full-stack practices, debugging, and system design while conducting code reviews and technical guidance.
VIMIGO
Data Automation Intern
Researched, delivered, and implemented automation workflows that reduced operational process problems by approximately 30%.
Automation delivery
- Automated customer-data entry and operational handoffs with HubSpot, Kommo, Zapier, WATI, and Airtable.
- Maintained AI chatbot workflows and created daily reporting dashboards.
Case studies
Operational consequences.
Representative engagements are anonymized to respect client confidentiality.
Architecture · Full stack · Client delivery
Enterprise operations suite
Custom business workflows spanning sales orders, purchasing, delivery, invoicing, role-based access, reports, and operational dashboards.
Improved day-to-day operations across sales, logistics, finance, and purchasing teams.
Regulatory API · Secure integration
Malaysia LHDN e-Invoice integration
In-house submission workflows for automated invoice validation and delivery to Malaysia's LHDN e-Invoice API.
Helped client systems prepare for and comply with national tax digitalization requirements.
System design · Technical leadership
Startup platform architecture
Architecture and workflow planning for two startup products, including client meetings, task distribution, and timeline maintenance.
Established modular foundations that support continued product delivery and team collaboration.
Capabilities
Broad stack, backend strength.
Comfortable learning across existing systems, legacy stacks, and modern product delivery.
Backend & languages
ScalaJavaPythonC#PHPJavaScriptActionScriptREST APIs
Frameworks & product
Play FrameworkSpringReactReact NativeVue.jsAdobe FlexApache CordovaBootstrap
Data & infrastructure
MySQLMSSQLPostgreSQLOracleDockerVercelGitHub
Tools & automation
VS CodeVisual StudioPostmanFigmaCodexClaudeHubSpotKommoZapierWATIAirtable
Credentials
Education, certifications, and recognition.
Education
Bachelor of Science in Industrial Statistics
Universiti Tun Hussein Onn Malaysia - Pagoh, Johor, Malaysia
2020 - 2024 - CGPA 3.36Certifications
Microsoft Office Specialist: Excel AssociateMicrosoft - 2019
Microsoft Certified: Azure AI FundamentalsMicrosoft - 2022
Business Analytics Certificate of AchievementCADS - 2023
Achievement
Second Place, ISM Challenge Poster Competition
Hosted by the Institute of Statistics Malaysia, 2022/2023
Languages
ChineseNative / most proficient
EnglishProfessional working proficiency
MalayProfessional working proficiency
HakkaConversational
Available for the right opportunity
Let's talk about the process behind your product.
Based in Kuala Lumpur, originally from Sabah. Open to roles across IT operations and technology teams.