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Francisco Merchan

@franciscomerchan

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Full Stack Developer at Huayra Solutions who refactored APIs and improved system stability during demand peaks.

Argentina

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At Huayra Solutions, I refactored Laravel and Node.js REST APIs for web and mobile applications, addressing production bottlenecks and improving system stability during demand peaks. I also implemented JWT authentication and role-based access controls.

I optimized critical SQL queries through indexing and query analysis, eliminating recurring endpoint timeouts. I wrote PHPUnit tests for new features and modules before deployment.

At Involve, I led a monolith migration to a modular architecture and integrated REST APIs to unify the backends of multiple mobile applications. I also developed a RAG system for a conversational AI assistant, using Pinecone to store product information.

At Involve and Sitenso, I built React.js interfaces and dashboards with TanStack Query, Zustand, and Tailwind CSS. I also configured Docker and GitHub Actions CI/CD pipelines for deployments to AWS EC2.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Developer

Current

Huayra Solutions

Dec 2024 - Present (1 year 10 months)

Redesigned and refactored REST APIs in Laravel and Node.js for high-traffic web and mobile applications, improving stability during demand peaks. Implemented JWT authentication and role-based access control, optimized critical SQL queries, and wrote automated tests with PHPUnit.

Laravel NodeJS REST APIs JWT Role Based Access Control SQL Optimization PHPUnit Modular Architectures

Full Stack Developer

Involve

Dec 2023 - Nov 2024 (11 months)

Led migration from a monolithic system to a modular architecture, designed and integrated REST APIs with Laravel and Node.js, and developed a RAG system for an AI assistant using Pinecone. Built React.js dashboards with TanStack Query, Zustand, and Tailwind CSS, and configured Docker and CI/CD pipelines with GitHub Actions on AWS EC2.

Laravel NodeJS REST APIs React Tanstack Query Zustand Tailwind Docker GitHub Actions EC2 Pinecone RAG Modular Architectures

Full Stack Developer

Sitenso

Dec 2021 - Nov 2023 (1 year 11 months)

Designed and implemented REST APIs with Laravel and Node.js, developed React.js interfaces and dashboards, and refactored legacy modules to improve readability, performance, and testability. Participated in code reviews to maintain code quality.