Yong Sen - Full-Stack Developer
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Resume

Professional experience, projects, education, and skills.

Professional Summary

Engineer with experience helping businesses transform traditional workflows into digital, smart, and intelligent systems. Main expertise in full-stack web development with Next.js, React, and Node.js — building scalable applications that handle both frontend and backend. Hands-on experience deploying and managing applications on AWS (EC2, VPC, S3, CloudWatch), configuring Nginx, managing processes with PM2, and setting up CI/CD pipelines. Comfortable working in Linux environments, writing shell scripts, and managing cron jobs. Recently focused on AI and LLM technologies — building AI assistants using Retrieval-Augmented Generation (RAG), working with vector databases like Qdrant, and experimenting with Hugging Face models for embeddings and language models. Fast learner who enjoys exploring new technologies and building practical solutions that create real value.

Professional Experience

Technical Lead

Whatif Solutions

Jan 2025 – Present

Georgetown, Penang, Malaysia

  • Provide technical leadership and mentorship to development teams, sharing expertise and guiding best practices
  • Support developers in enhancing their skills and problem-solving approaches while ensuring high code quality
  • Design and implement reusable solutions, components, and architectural patterns to improve efficiency and reduce delivery timelines
  • Research and evaluate frameworks, libraries, and tools to ensure optimal technical decisions aligned with project goals
  • Define and enforce clean coding structures and architectural standards for maintainability, scalability, and long-term sustainability

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