Freelancer profile translated to English.

Description

Developer specializing in access control systems and PHP/MySQL backend solutions with experience in hardware-software integration.

SPECIALTIES:

- PHP/MySQL backend development for business management

- Access control systems with NFC/RFID technology

- ESP32 programming and IoT microcontrollers

- Hardware-software integration and database communication

- REST APIs and secure authentication systems

HIGHLIGHTED EXPERIENCE:

I have developed complete access control systems for the hospitality and leisure sector, including:

- Parking management with dual validation (customer registration + recent activity)

- NFC turnstiles with custom profiles and complex business logic

- Web administration dashboards with role and permission control

- ESP32-MySQL integration for real-time NFC reading

TECHNOLOGY STACK:

- Backend: PHP, MySQL, JavaScript

- Hardware: ESP32, Arduino, RC522 (NFC/RFID)

- Communication: REST APIs, MQTT, serial protocols

- Security: Session management, CSRF protection, multi-level authentication

- Architecture: Modular design, scalable systems, logging and auditing

WORK APPROACH:

I develop robust, scalable solutions tailored to specific client needs. I combine web development experience with embedded systems knowledge to create complete turnkey projects.

Available for backend development, IoT integration, and access control system projects both remotely and in person in Granada and surrounding areas.

Industry field of expertise

Languages

Spanish
Native or bilingual
English
Conversational

Workplace preferences

Can work on-site

Granada (up to 50km), Madrid (up to 50km)

Lotus Centro
Full Stack Developer - IoT and Multi-site Access Control Systems
ENTERTAINMENT AND LEISURE
January 2026 - February 2026 (1 month)
Granada, Spain
Development and implementation of an integral multi-site system with hardware-software integration for a nightlife entertainment chain (Granada and Ontigola, Toledo), including IoT access control, cross-location customer loyalty, event management, and payment gateway.

MULTI-SITE ARCHITECTURE:
- Centralized database shared between both locations
- Unified loyalty system that recognizes customers at both sites
- Real-time synchronization of records and validations
- Differentiated profile and permission management by location

IOT ACCESS CONTROL:
- NFC turnstiles with ESP32 and RC522 readers for real-time validation
- Differentiated profiles (Couple, Girl, Boy) with custom logic per site
- Automatic daily reset at 12:00 noon with profile management
- Parking system with dual validation (registration + activity in the last 24 hours)
- Bidirectional real-time ESP32-MySQL integration

COMMERCIAL AND EVENT MANAGEMENT:
- Web platform for event publication and management
- Integrated payment gateway for online ticket sales
- Innovative multi-site loyalty system with frequency and spending metrics
- Deterrent control of staff invitations with limits and tracking
- Cross-location retention and engagement analytics

ADMINISTRATION:
- PHP/MySQL web panel with multi-role and per-location permission management
- Operational dashboard for multiple modules (bar, cashier, entrance, parking)
- Complete system for logs and access auditing
- Consolidated reporting of both sites in real-time

Technologies: PHP, MySQL, JavaScript, ESP32, Arduino, RC522 (NFC/RFID), payment gateway, serial communication, REST APIs, CSRF protection, multi-level authentication, multi-tenant architecture.
JavaScript, HTML5, CSS3, PHP, MySQL ESP32 Arduino NFC PHP/MySQL
Paladium Valencia
Full Stack PHP/MySQL Developer - Integrated Management System
ENTERTAINMENT AND LEISURE
November 2025 - January 2026 (2 months)
Valencia, Spain
Development of an integrated management system for an entertainment venue with multiple operational modules and advanced customer loyalty functionalities.

Implemented functionalities:
- Centralized web administration panel with PHP/MySQL
- Ticket management system with automatic assignment and availability control
- "Happy Hour" module with dynamic pricing and time validation
- VIP bonus management for frequent customers with a points system
- Access control with profile validation and entry logging
- Operational dashboard for multiple modules (bar, cashier, entrance)
- Customer management system with history and VIP classification
- User role and permission control by section
- Real-time reporting and usage statistics

Technologies: PHP, MySQL, JavaScript, HTML/CSS, modular architecture, complex business logic, secure session management, CSRF protection, internal APIs.
PHP/MySQL JavaScript, HTML5, CSS3, PHP, MySQL database-management external-api-integration system-integration
Oops Barcelona
Backend PHP/MySQL Developer
ENTERTAINMENT AND LEISURE
April 2025 - June 2025 (2 months)
Barcelona, Spain
Development of a backend management system for a nightlife venue, including access control, customer management, and operational administration.

Implemented functionalities:
- Web administration panel with PHP/MySQL
- Customer management and entry registration system
- User role and permission control
- Operational dashboard for multiple modules (bar, cashier, entrance)
- Access validation with custom business logic
- Secure session management and CSRF protection

Technologies: PHP, MySQL, JavaScript, HTML/CSS, modular architecture, session management, internal APIs.
PHP/MySQL JavaScript, HTML5, CSS3, PHP, MySQL database-management software-architecture external-api-integration