G
Gian Mastogiovanni
From Argentina
10:23 PM
(GMT-03:00)
$20/hr
Active 4 hours ago
Senior Full-Stack Developer
Full-Stack Engineer
Available for hire
Years of experience
7+ years
Experience level
Senior
Available for
Full-time, Freelance
Available from
14 Feb 2026
Full-Stack / Back-End Engineer with 6+ years of experience building and scaling production web applications.
I specialize in Node.js, NestJS, and modern JavaScript/TypeScript ecosystems, with strong experience delivering enterprise platforms, SaaS products, and high-traffic applications used by thousands of users.
I’ve worked on internal enterprise systems at Accenture, automated document-generation platforms, and Shopify Plus e-commerce stores for U.S. brands, covering the full development lifecycle: backend architecture, APIs, databases, frontend features, cloud deployments, and CI/CD.
I’m particularly interested in roles where I can contribute to scalable backend systems, product-driven development, and real business impact.
Skills
Languages
Employment History
Senior Full-Stack Engineer (Node.js / React) at
Accenture
Current
2023
-
Now
• Accenture is a global consulting company.
• I worked as part of an agile team of 5 engineers maintaining and scaling an internal human resources platform used by employees and managers across the organization.
• My main responsibilities included developing end-to-end features (NestJS + React), designing and maintaining PostgreSQL databases, fixing critical production issues, and collaborating with product and QA teams to deliver new modules.
• The platform is actively used by thousands of internal users, where the features I built are part of daily HR and management workflows, contributing to system stability, scalability, and continuous product improvement.
• The most valuable skills I developed here were working with enterprise-level architectures, building scalable backend services, and deploying applications using modern cloud and DevOps practices.
Stack: Nest.js - Node.js - React.js - PostgreSQL Docker - Kubernetes - Terraform - AWS - Azure - DevOps
Full-Stack Engineer (MERN) at
informesmecanicos.es
2023
-
2023
• informesmecanicos.es is a digital product focused on automating mechanical inspection reports, replacing manual and time-consuming documentation processes.
• I worked independently as a full-stack developer, responsible for building a complete web application to generate professional PDF reports from complex technical forms.
• I designed and developed the entire system using Node.js, Express, MongoDB and Puppeteer, implementing authentication, business logic, and dynamic PDF generation from HTML templates.
• The solution automated a fully manual workflow, allowing reports to be generated in seconds instead of hours, significantly reducing human error and operational time.
• The most valuable skills I gained were owning a product end-to-end, designing backend architectures from scratch, and building document automation systems.
Stack: Node.js - MongoDB - CSS - Express.js - Puppeteer - JWT - NGINX
Front-End Engineer (Shopify Plus) at
Simplistic
2021
-
2023
• Simplistic is a development agency specialized in high-traffic e-commerce solutions for U.S. brands using Shopify Plus.
• I was part of a frontend team responsible for developing and maintaining production-level online stores for international clients.
• My main tasks were building custom Shopify sections and features using Liquid and JavaScript, integrating third-party services via APIs, and implementing UI designs into fully functional e-commerce experiences.
• I worked on stores such as glowrecipe.com, loefflerrandall.com and algenist.com, which serve thousands of daily users, where my work directly impacted real customers and live revenue-generating platforms.
• The most valuable skills I developed were working on high-traffic production systems, performance-oriented frontend development, and building for conversion-focused user experiences.
Stack: JavaScript - Shopify - Liquid - HTML - CSS - REST APIs
Full Stack WordPress Engineer at
Mardelnet
2018
-
2021
• Mardelnet is a web development company delivering custom websites and digital solutions for multiple clients and industries.
• I worked as a developer building and maintaining several WordPress-based and custom web projects.
• I developed complete websites, custom plugins, and API integrations using WordPress, PHP, JavaScript and React, transforming UI designs into functional products.
• Multiple projects were delivered to production, improving clients’ digital presence and internal workflows.
• The most valuable skills I learned were professional web development foundations, direct client collaboration, and delivering complete projects from design to deployment.
Stack: Wordpress - PHP - MySQL - JavaScript - React.js - Elementor - ACF Pro - jQuery
Education
Bachelor of Computer Science at
Universidad Nacional de Mar del Plata
Current
2024
-
Now
