Hello! 👋

I'm Rafael Calamba

Full Stack Developer

About Me

I'm a Full Stack Developer specializing in building responsive web applications with various JavaScript frameworks. I have recent SEO optimization experience at SANDS UAE. I enjoy turning business requirements into maintainable code. Stability, performance, and user experience above all else!

HTML JavaScript CSS Python C# Visual Basic PHP Express.js Node.js Django Flask .NET Alpine.js Preact React Liquid jQuery Bootstrap Ahrefs Rich Results Test PageSpeed Insights Google Search Console Screaming Frog MySQL AWS DynamoDB SQL Server AWS S3 REST GraphQL Postman Jira Trello Zoho Desk Agile Waterfall Confluence Swagger .NET API Help Page AWS Elastic Beanstalk Shopify Docker ngrok GitHub Bitbucket Azure DevOps IIS WinSCP FileZilla

Projects

01

E-commerce Platform Enhancement and Optimization

Enhanced Shopify store for SANDS UAE and Whoop & Co. Nomod payment integration, express delivery implementation, SEO, code, and image optimization.

Express.jsPreactLiquidAhrefsAWSShopify
02

Certificate Management and Margin Calculator

Automated certificate generation and margin calculations for personal shoppers at SANDS UAE.

DjangoAlpine.jsReactZustandMySQLAWS
03

Internal Manufacturing Suite

Led full-stack development of three internal web applications (Containerization, Mill Manager, Material Request) for SomnoMed Ltd., reducing manual errors and improving workflow.

Flask.NETjQueryBootstrapSQL Server

Experience

Full Stack Developer

SANDS UAE

Feb 2025 - Present
  • Enhanced the checkout process using Checkout UI extensions and developed a custom API to integrate the Nomod payment gateway, streamlining the entire payment flow.
  • Automated certificate generation and margin calculations for personal shoppers.
  • Optimized site performance and improved SEO ranking, increasing the average PageSpeed score by 65%.
  • Maintained and added site features like dynamic Shipping Picker to improve customer usability.

Full Stack Developer

SomnoMed Ltd.

Jul 2021 - Jan 2024
  • Led the full-stack development of three internal web applications (Containerization, Mill Manager, Material Request) to track supply chain, milling, and logistics, reducing manual errors and improving workflow.
  • Detected and resolved supplier labeling defects by implementing barcode scanning and validation in the Avant Containerization system.
  • Automated the Inspection Quality Control (IQC) process with an AQL Calculator, determining sample sizes and reject limits to ensure compliance.
  • Developed a reusable Templating System to accelerate front-end development and maintain UI consistency across applications.

Analyst Programmer

Robinsons Bank Corporation (H2 Software Consulting)

May 2019 - Jul 2021
  • Developed modules (Amortization Schedule, Tenor, Outstanding Balance) for Automated Expected Credit Loss Calculation, enhancing the bank's financial reporting and risk management capabilities.
  • Revamped the e-Forms application (UI/UX and backend), introducing features like draft saving and duplicate prevention, improving application completion.
  • Automated the transaction matching process between Processed Transactions, DPMA, and RWallet, improving reconciliation accuracy.

Junior Application Developer

Gatchallan Tangalin & Co., CPAs

Dec 2017 - Jan 2019
  • Developed and launched GTC Forms, an internal web app that digitized forms and boosted productivity.
  • Built modules (Chart of Accounts, Journal Entry, Check Writer) for the Accounting System.

Education

Bachelor of Science in Information Technology

University of the East

Mar 2018