Efrain Landaverde
Efrain Landaverde

Senior Full Stack Product Engineer

Open to offers · Member since 4 Nov 2026
Location
San Salvador, El Salvador
Desired salary
Confidential
Work preference
Hybrid / Full Time, Part Time, Contract, Freelance, Temporary
Experience level
Senior

About

Professional summary

I am a full stack product engineer with more than six years of experience building web platforms, mobile applications, APIs, SaaS products, and digital experiences end to end.

I specialize in JavaScript and TypeScript ecosystems, including React, Next.js, Node.js, NestJS, Express, Laravel, and PHP. I build scalable frontend and backend solutions, from prototypes and MVPs to production systems.

I have worked on high-traffic media platforms, headless CMS implementations, e-commerce stores, payment systems, lending platforms, and mobile applications. My experience includes API design, GraphQL, REST APIs, PostgreSQL, MySQL, WordPress, WooCommerce, and cloud infrastructure.

I enjoy designing product architecture and technology roadmaps, integrating third-party services such as payment gateways, POS systems, logistics providers, and marketing platforms. I have also developed with Flutter, React Native, and Expo for mobile products.

I bring practical experience in security, Cloudflare protection, backups, access management, hosting, CI-ready development environments, and cloud services. I am also experienced with AI product development using the OpenAI API, LLMs, RAG pipelines, and vector databases.

I work comfortably across technical leadership, team planning, prototyping, technical proposals, and hands-on engineering. I am focused on creating reliable, maintainable, user-centered products that support business growth.

Skills

56 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

CTO / Full Stack Developer Savvy Post Marketing

I design the architecture and technology roadmap for SaaS products, web applications, and mobile applications. I build prototypes and MVPs while evaluating emerging technologies and cloud services.

I develop APIs and integrations with POS systems, payment gateways, logistics services, and marketing platforms. I also refactor AI pipelines using the OpenAI API and have delivered a Flutter mobile application with a Laravel backend.

I manage security, access controls, backups, and cybersecurity best practices for product infrastructure.

Webmaster & Full Stack Developer Diario El Salvador

Developed and maintained high-traffic news websites, improving platform stability, availability, and page load performance. Implemented headless architectures using GraphQL APIs and Next.js frontends.

Built the ePaper platform as a PWA using Next.js and NestJS. Created reader-engagement products and mini-applications, including the xpot.sv digital magazine.

Performed security analysis and site protection using Cloudflare, and optimized advertising placements to balance user experience, performance, and monetization.

Senior Backend Developer IdeaTech

Developed APIs for a lending and payments financial platform using Node.js, Express, Knex, PostgreSQL, and AWS RDS. Built the complete web platform using Next.js.

Set up and maintained development and production environments. Maintained and evolved client projects built with PHP and Laravel.

Lead Developer DIVE Digital Experience

Led the development team through planning, technical sales proposals, requirements analysis, and prototyping. Delivered e-commerce sites using WordPress and WooCommerce with Stripe, PayPal, Wompi, Pagadito, and BAC payment integrations.

Developed hybrid mobile applications, management systems, voting platforms, HTML5 games, and augmented reality experiences with Spark AR. Managed domains, hosting, servers, and cloud services using cPanel, WHM, Google Cloud, and DigitalOcean.

Frontend Developer YTTOR

Developed PHP, MySQL, and WordPress projects, along with interactive web applications. Built an interactive map viewer with ArcGIS for a government institution.

Planned team tasks and coordinated deliveries to support project execution.

Web Developer Diferente Web

Developed websites and e-commerce stores using WordPress and WooCommerce. Supported frontend implementation with HTML, CSS, and JavaScript.

Education

Learning history

ITCA FEPADE

Technician, Computer Systems Engineering

Computer Systems Engineering Technician program completed in San Salvador, El Salvador.

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