Gustavo Perez
I build and support reliable business systems focused on integrations, reporting, automation, and operational efficiency, with strong experience in payroll, HR, finance, and attendance platforms.
About Me
I’m a bilingual software developer (English/Spanish) with full-stack web development experience since 2010. From 2010 to 2018, I worked as a freelance developer, building custom web applications for different business needs. Since 2018, I have worked extensively in payroll and HR technology, developing and maintaining PHP-based applications integrated with SAP SuccessFactors.
I specialize in PHP, JavaScript, Python, C#, SQL, Laravel, CodeIgniter, and Django. I’ve led software implementations for clients across Trinidad and Tobago, Barbados, Bermuda, St. Lucia, Dominican Republic, Dominica, St. Vincent, Guyana, Costa Rica, and the Cayman Islands. My focus is delivering reliable and scalable web applications while providing clear client communication.
Skills & Technologies
Core Technical Stack
Full-stack web development experience focused on HR, payroll, attendance, business applications, integrations, financial systems, reporting, deployment, security practices, and operational reliability.
Languages & Core
Frameworks & Frontend
Database & Infrastructure
Business Systems & Integrations
Security & Delivery
Systems Experience
Business web application development, SAP SuccessFactors integrations, payroll, HR, attendance, time management workflows, financial system integrations, reporting, automation, and operational processes.
Technical Analysis
Root-cause analysis for complex application issues involving payroll calculations, attendance rules, reports, integrations, data validation, access control, and business workflows.
Delivery Focus
Reliable and scalable business applications, practical software solutions, client-facing delivery, service coordination, and end-to-end ownership from analysis to delivery.
Professional Strengths
- Technical analysis and problem solving
- Clear communication with international clients
- Translating business requirements into working software
- Cross-functional coordination between support, implementation, and development teams
- Task follow-up, service coordination, and personnel management
Cloud & Deployment
- AWS EC2 deployment and environment setup
- Ubuntu Server, Nginx, SSL, PHP-FPM
- FTP/SFTP, SMTP, Git, Linux, and production troubleshooting
- Access control, request validation, and secure deployment practices
- Server hardening
Remote Work Setup
- High-performance workstation with 3-monitor setup
- MacBook Air M4 for mobile work and backup development
- 1Gbps wired internet connection
- Backup power supplies for work continuity
Experience
Technical Lead & Project Coordinator
2023 - Present
Currently involved in technical leadership, service coordination, client delivery, task follow-up, and personnel management responsibilities. Lead and support payroll, HR, attendance, reporting, financial integration, and system improvement initiatives for international clients. Coordinate requirements, testing, issue resolution, client communication, and cross-functional work between support, implementation, and development teams.
Software Developer & Implementation Specialist
2018 - 2023
Developed and maintained PHP-based payroll and HR applications, including attendance workflows, SAP SuccessFactors integrations, financial system integrations, reporting modules, payroll calculation support, data validation processes, and client-specific implementation requirements. Led and supported implementations for clients across Trinidad and Tobago, Barbados, Bermuda, St. Lucia, Dominican Republic, Dominica, St. Vincent, Guyana, Costa Rica, and the Cayman Islands.
Freelance Web Application Developer
2010 - 2018
Built custom web applications for small businesses and independent clients, working across backend, frontend, databases, and deployment. Developed practical solutions using PHP, JavaScript, SQL, HTML/CSS, C#, and related technologies, gaining early experience in full-stack development, client communication, and business-focused software delivery.