Yong Sen - Full-Stack Developer
← Home

Resume

Professional experience, projects, education, and skills.

Professional Summary

Software Engineer with 5+ years of experience building scalable web applications and transforming business workflows into digital systems. Skilled in Next.js, React, Node.js, and AWS cloud deployment. Experienced in integrating third-party services and recently focused on AI applications (RAG, LLMs, vector databases). Strong problem solver and fast learner with a track record of delivering practical, high-impact solutions.

Professional Experience

Technical Lead

Whatif Solutions

Jan 2025 – Present

Penang, Malaysia

  • Lead and mentor developers, improving code quality and team capability
  • Design scalable architectures and reusable components
  • Establish coding standards and drive technical decisions
  • Architect modular systems enabling tenants to access multiple apps via a unified dashboard
  • Implement shared data architecture with tenant isolation
  • Develop an AI-powered agent for natural-language data retrieval and analysis
  • Design LLM tool-calling workflows for intelligent system interaction
  • Mentor developers and enforce coding and architectural best practices

Software Engineer

Whatif Solutions

Aug 2023 – Aug 2025

Penang, Malaysia

  • Develop full-stack applications using Next.js, React, and Node.js
  • Build and maintain RESTful APIs; integrate payment gateways, WhatsApp, and SMS APIs
  • Manage databases and improve system performance

Software Engineer Intern

Finexus Group

Feb 2023 – Aug 2023

Malaysia

  • Research database migration and build migration tooling (MSSQL → PostgreSQL/MariaDB)
  • Build Java validation tooling to ensure data integrity
  • Work with Spring Boot and related backend patterns

Key Projects

Multi-Tenant Business Platform (Marketplace System)

  • Platform enabling businesses to create tenants and subscribe to multiple internal applications
  • Centralized landing and access within a unified ecosystem
  • Cross-tenant user access with role-based permissions (IAM)
  • Shared services architecture for data consistency across applications
  • Next.js and React monorepo architecture

DocuFill – Document Automation Platform

  • Automated Word document generation with dynamic templates
  • Batch processing and cloud storage integration

Education

Bachelor’s in Software Engineering (Distinction)

TARUMT — Tunku Abdul Rahman University of Management and Technology

Apr 2021 – Aug 2023

Dean’s List (2022) | President’s List (2021)

Diploma in Computer Science (Distinction)

TARUMT — Tunku Abdul Rahman University of Management and Technology

Mar 2019 – Mar 2021

Technical Skills

Frontend

React.jsNext.jsHTMLCSSJavaScript

Backend

Node.jsREST APIs

Databases

MongoDBPostgreSQLMySQL

Cloud & DevOps

AWS (EC2, S3, VPC)NginxPM2CI/CD

Programming

JavaScriptPythonJavaC++SQL

Tools

GitHubGitLab

Strengths

  • Strong problem-solving and research skills
  • Fast learner with high adaptability
  • Ability to translate business needs into technical solutions
  • Passionate about building impactful systems

Contact

yeohyongsen@gmail.com
+60 13-481 1808
Penang, Malaysia