Gerald TAYAG

Professional Experience Globe Telecom – Globe At Home App

Fullback & Mobile Developer
Worked on multiple enterprise-scale applications across utilities, telecommunications, and energy sectors. Responsibilities included designing code architecture, UI/UX development, building mobile and web applications, conducting tests (Unit & Mockito), and deploying scalable solutions using cloud services (AWS & Azure).

Key Technologies:

• Mobile: Android (Kotlin, Java), Flutter (Dart), iOS
• Web: Angular, Node.js
• Backend/Other: Python, Unit Testing, Mockito
• Cloud: AWS, Azure Communication Services (ACS)
• Developed features that allow broadband and prepaid WiFi customers to manage accounts seamlessly.
• Enabled key functionalities including prepaid balance checks, data usage tracking, bill payment, and mobile top-ups.

Globe Telecom – Agent Sales and After Sales Platform (ASAP)

• Built a web application and set of APIs to digitize sales and after-sales processes, removing paper-based workflows.
• Delivered modules for sales visit tracking, digital applications, and analytics reporting.

Maynilad Water – Utility Management System

• Co-developed a web-based system for water and electricity utilities to manage customers, meter readings, billing, and rates.
• Designed with Angular and Node.js to ensure accessibility anywhere via the internet.

Meralco Energy Projects

• Virtual Customer Assistant (VCA):
  Implemented a customer support solution using Azure Communication Service (ACS) to enable real-time video consultations with agents. Expanded deployment from business centers to partner locations, improving customer accessibility and service quality.
• Codelight (COVID-19 Bot):
  Designed and deployed an internal health-monitoring bot to support COVID-19 protocols. Collected and analyzed employee health data to strengthen workplace safety initiatives during the pandemic.
• Meralco Appliance Calculator:
  Built a consumer-facing tool that calculates the estimated electricity cost of household appliances per hour, day, week, or month. Enhanced customer awareness of energy usage and promoted energy efficiency.
• Handheld Terminal (HHT):
  Developed a mobile application to replace legacy handheld devices for field technicians. Supported offline itinerary downloads, meter reading capture, and local storage with secure syncing to enterprise systems.
• Real-Time Validation:
  Created an application to instantly validate disconnected accounts based on SIN data, streamlining field operations and reducing errors.
• URL Shortener:
  Built an internal marketing tool to generate short, trackable links for campaigns, enhancing digital outreach and analytics.
• Advisory Portal & Advisory Bot:
  Designed a centralized web portal for company-wide advisories, supporting acknowledgment tracking and employee interaction. Integrated with Microsoft Teams via a bot to deliver real-time notifications and feedback features directly within the collaboration tool.
• Meter Reading Modernization (MR Online & MR App):
  MR Online: A centralized web-based hub to manage meter reading activities, assign itineraries, process data, and integrate with enterprise and third-party systems. Features included secure authentication, scalable storage, and operational workflow management.
  MR App: A mobile application replacing manual handheld workflows with real-time itinerary sync, push notifications, and secure API-based data uploads — improving accuracy and operational efficiency for roving personnel.
• Social Listening Tool (SLTI):
  Developed a next-generation platform to capture and analyze conversations across Meralco’s official social media channels in real time. Leveraged advanced analytics to measure sentiment, identify trends, and generate actionable insights. Automated ticket creation and case management processes, enabling proactive customer engagement, improving service quality, and turning social media interactions into data-driven intelligence.

Lead Android Developer – Financial Services
Led the design, development, and deployment of mobile solutions for financial services, with a focus on secure and user-friendly digital payment and card management applications. Oversaw the full development lifecycle — from architecture design to Play Store release — while ensuring scalability, performance, and compliance with industry standards.

Key Responsibilities:

• Designed and implemented application architecture, ensuring maintainability, modularity, and performance.
• Led UI/UX design to deliver intuitive, user-friendly financial service applications.
• Conducted rigorous testing (manual and automated) to validate program operations, debug issues, and optimize performance.
• Produced detailed technical specifications and documentation to support development and compliance.
• Deployed and maintained applications on the Google Play Store, ensuring high availability and seamless updates.
• Collaborated with internal stakeholders to translate business requirements into functional features.

Technologies & Tools:

• Mobile: Android (Java/Kotlin), Ionic, iOS
• Practices: Unit Testing, Code Review, Continuous Integration/Deployment (CI/CD)
• Domain Knowledge: Financial Services, Card Management, Bill Payments, Money Transfers

Key Contributions:

• Delivered a secure, scalable financial services mobile platform enabling users to manage cards, pay bills, and transfer money with ease.
• Enhanced customer experience through modern UI/UX practices and optimized application performance.
• Strengthened security and compliance within digital transactions while maintaining smooth user workflows.
• Acted as a lead contributor in aligning technical delivery with business objectives in the financial services domain.

Programmer – Corporate Applications & Mobility
Contributed to the design, development, and maintenance of mobile and web solutions supporting internal company processes, communication, and data analysis/reporting. Worked across front-end and back-end development, ensuring stable operations and continuous improvements to business applications.

Key Responsibilities:

• Developed and deployed Android applications for internal company use, improving communication and operational efficiency.
• Modified and maintained existing web pages and applications, ensuring functionality, usability, and compatibility.
• Handled both front-end and back-end development tasks, supporting end-to-end delivery of corporate applications.
• Conducted system testing, debugging, and code modifications to confirm smooth program operation and resolve issues.
• Collaborated with internal stakeholders to understand requirements and deliver tailored technical solutions.

Technologies & Tools:

• Mobile: Android (Java/Kotlin)
• Web: Frontend & Backend development (various technologies)
• Domain Knowledge: Corporate Processes, Communication Systems, Data Analysis & Reporting

Key Contributions:

• Delivered Android-based applications that enhanced internal workflows and corporate communications.
• Improved system reliability and performance by maintaining and upgrading existing web solutions.
• Supported data-driven decision-making by developing tools for data analysis and reporting.

Android Developer (Full-Stack Capabilities)
Company • 2014 – 2015

Role Summary
Developed, tested, and maintained Android applications to support corporate processes, communications, and marketing initiatives. Managed the complete software lifecycle—from requirement gathering and specifications to coding, debugging, database management, and Play Store publishing—while collaborating with internal communications/marketing teams to deliver effective in-app campaigns and advertisements.

Core Responsibilities

• Application Development: Built and maintained Android apps using Java, Android SDK, and XML-based layouts; followed Activity/Fragment lifecycle best practices.
• Quality & Testing: Confirmed program operation by running manual and automated tests with JUnit and Android Instrumentation Tests; debugged using Android Debug Bridge (ADB) and Logcat.
• Specifications & Documentation: Prepared detailed technical specifications, flow diagrams, and user documentation.
• Database Management: Designed and updated relational databases (SQLite) for local storage; implemented synchronization with remote back-end services via REST APIs and JSON/XML parsing.
• Back-End Integration: Consumed web services (PHP/Java/.NET based APIs); handled authentication, caching, and offline storage.
• Release & Store Operations: Managed Google Play Store deployment including signing, ProGuard obfuscation, store listing, screenshots, and staged rollouts.
• Security & Compliance: Applied secure coding, data encryption, obfuscation (ProGuard/DexGuard), and followed Google Play policies of the period.
• Collaboration: Coordinated with Corporate Communication & Marketing teams to translate campaign requirements into in-app promotional features.
• Support & Optimization: Troubleshot crashes, optimized UI rendering, reduced app size, and improved responsiveness across devices with varying screen sizes and OS versions (Android 4.x – 5.x).

Communications & Marketing Features

• Integrated in-app banners, push notifications (via Google Cloud Messaging – GCM), and promotional messages.
• Supported ad placements using AdMob SDK and custom corporate advertisement modules.
• Designed campaign reporting features (impressions, clicks, engagement rates) for internal communications and marketing stakeholders.

Technological Knowledge (2014–2015)

• Android/Mobility: Java, Android SDK, Eclipse/Android Studio (early versions), Activities/Fragments, AsyncTask, Handlers, Services, Content Providers, Loaders, Broadcast Receivers, Fragments.
• UI Development: XML layouts, ActionBar/Toolbar, ListView/RecyclerView (introduced 2014), Navigation Drawer, Fragments, ViewPager.
• Data & Storage: SQLite, SharedPreferences, Content Providers.
• Networking: Apache HttpClient (deprecated), HttpURLConnection, Volley (introduced 2013), early Retrofit, JSON/XML parsing.
• Back End: PHP/MySQL, JSP/Servlets, or .NET Web APIs for server-side integration.
• Testing & Tools: JUnit, Espresso (initial releases), Robotium, ProGuard.
• Analytics & Ads: Google Analytics SDK (mobile), AdMob SDK, Crashlytics (early versions), Flurry Analytics.
• Version Control: Git, SVN.
• CI/CD (2014 era): Jenkins, Ant/Gradle (Gradle gaining adoption at that time).