Open to opportunities

Walther Alfredo

@waltheralfredo

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Backend Developer with 7+ years building scalable APIs, integrations, and e-commerce solutions in PHP and Node.js.

Peru

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What I'm looking for

I’m looking for Backend Developer opportunities where I can build scalable PHP/Laravel and Node.js APIs, own integrations, and collaborate in remote product-oriented teams—using clean architecture, automation, and strong technical documentation to deliver measurable business impact.

I’m a Backend Developer with more than 7 years of experience building scalable web applications, REST APIs, and backend integrations for e-commerce and enterprise environments. I’ve worked with international clients and multidisciplinary teams at companies like Globant and Seidor, always focused on maintainable, scalable systems aligned to business needs.

Recently at Seidor, I improved an omnichannel chatbot system’s efficiency from 20% to 40% by integrating REST/WebSocket connectors with n8n and MongoDB, and reduced WhatsApp response times from 40 seconds to 5 seconds through automations using AI, APIs, and webhooks. I also boosted stability and maintainability by refactoring legacy JavaScript and implementing backend improvements, reducing integration issues by 35%+.

Across my roles, I’ve delivered backend platforms for international customers using PHP, Laravel, and Magento, supported data migration and governance with Python/Pandas and Azure Data Factory, and modernized legacy systems toward Laravel. I enjoy collaborating in remote, product-oriented teams and mentoring clients to replicate integration flows, turning delivery into long-term adoption.

Experience

Work history, roles, and key accomplishments

Back-End Developer (Node.js)

Seidor

Jan 2025 - Apr 2026 (1 year 3 months)

Integrated REST/WebSocket connectors to improve a chatbot omnichannel system’s efficiency from 20% to 40%, reducing integration errors by 35%+. Implemented IA-driven WhatsApp automations to cut response times from 40s to 5s and improved backend stability via refactoring.

MongoDB REST APIs WebSockets N8n Docker AWS Angular

Analista Técnico Backend Support

Indra

Dec 2024 - Jun 2025 (6 months)

Produced technical/functional documentation and ensured delivery alignment across project flows. Developed Python/Pandas scripts for backend workflows and data validation, and supported data migration/governance using Azure Data Factory.

Python Pandas SQL Server Azure Data Factory Excel

Back-End Developer (PHP/Laravel)

Globant

Jul 2021 - Jul 2024 (3 years)

Led backend development for international e-commerce clients (e.g., Disney, Deloitte), building scalable solutions to improve operational efficiency. Developed and maintained applications using PHP/Laravel and Magento, and delivered WordPress solutions with data-collection workflow automation.

PHP Laravel Magento JavaScript WordPress

Fullstack PHP Developer (Proyecto)

Ministerio de Cultura del Perú

Nov 2019 - Feb 2020 (3 months)

Developed a digital loan system for archaeological heritage records in Laravel, reducing process times by 60% through digitization of manual workflows. Optimized ticket system backend performance and contributed to modernization of legacy systems by migrating flows from Java to Laravel 5.7.

Laravel PHP Java Vue.Js jQuery JavaScript

PHP Developer

Atomikal

Jun 2018 - Oct 2019 (1 year 4 months)

Led migration of a native PHP sales system to Laravel, increasing development speed from 15% to 35% and improving code scalability/maintainability. Optimized reporting generation performance and built responsive interactive multimedia/promotional platforms.

PHP Laravel JavaScript MySQL HTML CSS jQuery