b
benjadev0

Benjamin Ayala

@benjadev0

Full Stack Developer

Argentina
Spagnolo, Inglese
Alcune informazioni sono riportate in lingua inglese.
Chi sono
Hi! I'm Benjamín, a Systems Analyst specializing in Full Stack architecture. Whether you need to fix a complex database, integrate a secure payment gateway, or build a SaaS/E-commerce MVP from scratch, I can help. I bridge the gap between seamless UI and robust backend systems. Tech Stack: Frontend: React, React Native, Tailwind Backend: Node.js, Express, REST APIs Data: PostgreSQL (Relational modeling) Integrations: Stripe, Mercado Pago, Webhooks I design systems that scale. Send me a message to discuss your project!... Continua a leggere

Competenze

b
benjadev0
Benjamin Ayala
offline • 
Tempo di risposta medio: 1 ora

Consulta i miei servizi

Siti web personalizzati
I will develop a scalable react frontend for your saas or web app
A partire da80 USD / progettoMaggiori dettagli

Portfolio

Esperienza lavorativa

Freelancer.com

Full Stack Mobile Developer

Freelancer.com • Full time

Dec 2025 - Present • 5 mos

Architected and developed a mobile SaaS platform (Booking & CRM) for appointment management using React Native (Expo) and TypeScript. • Backend & Security: Engineered a RESTful API (Node.js/Express) with modular controllers. Secured endpoints integrating JWT, bcrypt, rate-limiting, and Helmet. • Database & Logic: Designed a normalized PostgreSQL database (Sequelize) optimized for schedule availability validation. Developed custom algorithms to validate time-slots and prevent conflicts. • Mobile App & UI: Implemented domain-specific modules with Cloudinary for visual tracking. Integrated Expo Notifications for local push alerts, designed to reduce client no-shows. • Analytics: Developed an analytics dashboard aggregating daily revenue and appointment status distribution.

Full Stack Developer

UADER (Systems Analyst Capstone Project)

Aug 2025 - Dec 2025 • 4 mos

Full-stack end-to-end development of "Mate Único", an e-commerce platform built with a decoupled Headless architecture to ensure high scalability. • Architecture & Backend: Separated the React+Vite Frontend from the Node.js/Express Backend and Strapi CMS. Built a robust RESTful API with custom controllers, Node-Cache, and messaging services. • Database: Modelled a relational PostgreSQL database via Sequelize ORM, ensuring referential integrity of transactions and stock. • Integrations: Secured authentication using Google OAuth 2.0 & JWT. Implemented Mercado Pago payment gateway (Webhooks) and Cloudinary for media delivery. • Frontend: Created a responsive, optimized UI with TailwindCSS, managing global state with React Context API. • Agile & QA: Led Kanban planning in GitHub Projects, executed Black Box/E2E testing, and authored extensive UML/API documentation. Delivered the MVP one week ahead of schedule.