Featured systems
Illustrative mockups · Not actual screenshots · Sample data
THE WORK. THE EXPERIENCE. THE PERSON.
A closer look.
Software engineering
with a wider perspective.
01 / THE PORTFOLIO AT A GLANCE
Experience that builds.
Hands-on foundations before generative AI.
Modern tools. Thoughtful, reliable software.
Engineering toolkit
Learning, documented.
Developer. Technology leader. Entrepreneur. Educator.
03 / FEATURED SOFTWARE PROJECTS
Real systems.
Real-world purpose.
Explore five interface concepts.
Select a preview for the full project details.
Mobile Application / Transportation Technology
PARA Tricycle
A transportation and delivery platform connecting passenger and driver mobile applications with a web-based administration system.
Key features: Passenger Registration, Driver Registration, Authentication.
Enterprise Web Application
ER Creative Group System Portal
A centralized enterprise portal designed to manage membership information, financial records, donations, organizational activities, and administrative operations.
Key features: Members Management, Members Portal, Venture Capitalization.
Enterprise Software / Financial Management
Accounting Management System
An integrated accounting system designed to streamline financial transactions, financial reporting, and business accounting operations.
Key features: Chart of Accounts, Journal Entries, General Ledger.
Enterprise Software / Human Resources
HRIS & Payroll Management System
A comprehensive Human Resource Information System designed to streamline employee management, attendance, payroll processing, and workforce administration.
Key features: Employee Management, Employee 201 Files, Attendance Monitoring.
Enterprise Software / Document Management
Document Management System
A centralized, company-based document management platform with department-level permissions and Google Drive-like folder organization.
Key features: Document Uploading, Department-Level Permissions, Folder Organization.
02 / TECHNICAL EXPERTISE
The tools behind the work.
10 categories · 116 technologies & capabilities.
Select a card to explore the full skill set.
TECHNOLOGIES & PRACTICAL CAPABILITIES
Backend Development
PHPCodeIgniterLaravelRESTful APIsAPI DevelopmentAPI IntegrationMVC ArchitectureServer-Side DevelopmentAuthentication and AuthorizationBusiness Logic DevelopmentDatabase IntegrationPHP Composer
TECHNOLOGIES & PRACTICAL CAPABILITIES
Frontend Development
HTML5CSS3JavaScriptjQueryAjaxBootstrap 5Tailwind CSSVue.jsResponsive Web DesignDynamic User InterfacesDataTablesChart.jsVite
TECHNOLOGIES & PRACTICAL CAPABILITIES
Mobile Application Development
FlutterDartAndroid Application DevelopmentiOS Application DevelopmentFirebase AuthenticationCloud FirestoreFirebase StoragePush NotificationsGoogle Maps IntegrationGoogle Places APIMobile Payment Integrations
TECHNOLOGIES & PRACTICAL CAPABILITIES
Database Management
MySQLMariaDBSQL Query OptimizationDatabase DesignDatabase NormalizationRelational Database ArchitectureData MigrationDatabase Backup and RestorationDatabase Performance Optimization
TECHNOLOGIES & PRACTICAL CAPABILITIES
WordPress Development
WordPress Website DevelopmentCustom WordPress WebsitesElementorTheme CustomizationPlugin IntegrationWebsite MaintenanceWebsite Performance OptimizationWordPress Hosting and Deployment
TECHNOLOGIES & PRACTICAL CAPABILITIES
Cloud, Servers & Infrastructure
Cloud-Based Server ManagementVPS Server ManagementDomain Registration and ManagementWeb HostingDNS ConfigurationSSL Certificate ConfigurationPleskNginxApacheLinux Server EnvironmentsApplication DeploymentProduction and Staging EnvironmentsServer TroubleshootingDatabase HostingServer MaintenanceWebsite MigrationServer Security Practices
TECHNOLOGIES & PRACTICAL CAPABILITIES
API & Third-Party Integrations
REST API DevelopmentAPI AuthenticationThird-Party API IntegrationPayment Gateway IntegrationPayMongoGCash Payment IntegrationGoogle Maps APIGoogle Places APIFirebaseEmail API IntegrationSMS API IntegrationOAuth 2.0Microsoft 365 Email IntegrationWebhooksCRM API Integration
TECHNOLOGIES & PRACTICAL CAPABILITIES
Development Tools & Version Control
GitGitHubGit RepositoriesVersion ControlBranch ManagementCode CollaborationVisual Studio CodeXAMPPComposerPackage ManagementLocal Development EnvironmentsDebugging Tools
TECHNOLOGIES & PRACTICAL CAPABILITIES
Business Automation & CRM
GoHighLevel (GHL)CRM IntegrationsWorkflow AutomationAPI-Based CRM IntegrationAutomated Record CreationLead Management AutomationZapierGoogle Sheets AutomationWebhooksAutomated Data ProcessingBusiness Process Automation
TECHNOLOGIES & PRACTICAL CAPABILITIES
Reporting & Document Generation
TCPDFFPDFDompdfPDF Report GenerationDynamic Document GenerationData ExportingExcel/CSV ReportingBusiness Reporting Dashboards
04 / PROFESSIONAL EXPERIENCE
A career in building.
A progression into leadership.
8years of software
development experience
development experience
Three roles. A growing perspective. Select a role to explore the responsibilities.
KIWI Digital TechChief Technology Officer (CTO)View responsibilities · 12 focus areas2023–Present
RESPONSIBILITIES & EXPERIENCE
- Technology leadership and strategic planning
- Software architecture and development oversight
- Management of software development projects
- Leadership and coordination of technical teams
- Full-stack web and mobile application development
- Cloud and VPS infrastructure management
- API integration and system interoperability
- Software deployment and maintenance
- System performance optimization
- Technical troubleshooting and problem-solving
- Aligning technology requirements with business objectives
- Enterprise and business management systems
Red Circle GlobalWeb Developer | IT ConsultantView responsibilities · 9 focus areas2020–2023
RESPONSIBILITIES & EXPERIENCE
- Developed websites and web applications around business requirements
- Optimized SQL queries for database performance
- Developed an RFID-integrated Canteen Management System for schools
- Maintained and upgraded school management systems
- Maintained and improved multi-level marketing systems
- Managed internal testing and staging environments
- Deployed applications to production
- Provided technical support and troubleshooting
- Resolved client requests and system issues
Lucky 4A CorporationApplication Developer and SupportView responsibilities · 7 focus areas2019–2020
RESPONSIBILITIES & EXPERIENCE
- Developed and maintained centralized business management systems
- Purchasing, sales, inventory, and warehousing management
- Accounting system integration
- Improved business process efficiency
- Maintained existing software applications
- Conducted system testing
- Managed staging-to-production deployments
2026 / Continuing the work
Technology leadership, software engineering & entrepreneurship.
Leadership & teachingTechnical strategy, team leadership, delivery & university instruction
05 / TECHNOLOGY LEADERSHIP
From writing code
to leading technology.
CTO at KIWI Digital Tech since 2023.
Technical depth with business perspective.
My leadership work connects CTO and Head of IT responsibilities: managing developers and technical personnel, coordinating the software development lifecycle, planning requirements, reviewing development approaches, and aligning deployments and infrastructure with business priorities.
Technical Strategy
Aligning technology solutions with business requirements and supporting business technology decisions.
Team Leadership
Coordinating developers, technical personnel, development activities, and technical priorities.
Software Architecture
Designing reliable, maintainable, and scalable applications while reviewing development approaches.
Project Delivery
Overseeing planning, infrastructure requirements, deployment, and ongoing maintenance.
EDUCATION & MENTORSHIP
Making knowledge useful to others.
As a former university Computer Science instructor, I have shared technical knowledge with students alongside my work in software development and technology leadership.
Beyond the codeBackground, development philosophy & hands-on foundations
01 / ABOUT ME
Beyond the Code
Eight years of building software.
A foundation built through experience.
I’m John Rey B. Katigbak, a software developer, technology leader, and entrepreneur from Batangas, Philippines.
My development journey began in 2019, before generative AI coding assistants became widely available. I built my foundation by writing code, debugging applications, designing databases and software architectures, and solving real-world technical problems.
My career has progressed from Application Developer and Support to Web Developer and IT Consultant, and eventually to Chief Technology Officer at KIWI Digital Tech.
Hands-on engineering.
A wider view of technology.
Today, I specialize in web and mobile applications, enterprise management systems, API integrations, cloud-based applications, and business technology solutions.
I have led technical teams, managed IT operations, overseen software projects, and taught Computer Science students at the university level. Great software earns its place through reliability, efficiency, maintainability, scalability, and the problems it solves.
Clean Code. Clear Thinking. Better Software.
Write Clean Code
Readable, organized, maintainable, and well-structured.
Remove Unnecessary Code
Eliminate unused functions, redundant logic, obsolete components, and unnecessary dependencies.
Optimize Performance
Improve database queries, application performance, and resource utilization.
Build for Scalability
Design for future business requirements.
Prioritize Security
Apply access control, input validation, secure development practices, and appropriate data protection.
Keep Improving
Continuously refactor, test, maintain, and improve.
FOUNDATIONS FIRST. MODERN TOOLS, TOO.
A developer before the rise of generative AI.
My foundation comes from programming, documentation, debugging, and hands-on problem-solving. Today, I embrace AI as a productivity tool while maintaining the engineering skills to understand, design, debug, optimize, and maintain software independently.
06 / TRAININGS & SEMINARS
Learning, documented.
Four completed trainings. Original certificates.
Select any preview to view the full document.
07 / CONTACT & PROFILES
A place to connect.
Development. Technology. Collaboration.
John Rey B. Katigbak
Chief Technology Officer · KIWI Digital Tech
Batangas, PhilippinesLOCATION
Direct contact
- Email address
- Not provided
- Phone number
- Not provided
- Résumé
- File not provided
PROFESSIONAL FOCUS
From hands-on development
to technology leadership.
Contact channels will become available once verified profile links and details are supplied.