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Efren Alvarez
@dev_efren
Cybersecurity Engineer
Mexico
English, Spanish
About me
I am a Cybersecurity Engineer who graduated in 2025, with more than five years of experience in software development and cybersecurity. Throughout my career, I have worked on developing secure and reliable software solutions for a wide range of clients, from small businesses to international companies.
My experience includes web and mobile application development, backend systems, automation, and the implementation of security practices throughout the software development process.
Skills
Efren Alvarez
Offline •
Average response time: 1 hour
See my services
Full Stack Web Applications
I will develop custom web apps, apis, integrations and automations
Portfolio
Work experience
Freelancer.com
Freelance • 3 yrs
CRM and PMS Development
Dec 2023 - Present • 2 yrs 10 mos
* Led the development of a complete Property Management System, including reservation management, customer quoting, authentication, and session management modules. * Implemented annual and monthly calendar views, profit dashboards, service racks, and housekeeping management. * Developed role and permission management, an integrated CRM, and WhatsApp messaging through the WhatsApp API. * Automated backups and integrated with OTAs such as Booking.com and Airbnb, including price calendar configuration, date blocking, and minimum-stay restrictions.
McCain Project
May 2026 - Jul 2026 • 2 mos
- Developed an end-to-end solution for an in-person campaign aimed at promoting McCain product consumption. - The solution included a custom CRM, WhatsApp chatbot integration, receipt upload functionality, S3 file storage, and a points-based rewards system. - Server configuration
Software developer Intern
ITITA • Part-time
Jan 2025 - May 2025 • 4 mos
- Developed an airport surveillance platform for SEDENA featuring real-time, alert-based video streaming. - Implemented a KPI dashboard to monitor the availability metrics of airport assets.
