Full Stack Engineer

Summary

Tomás F, V is a proficient Full Stack and Frontend Developer with a robust background in designing and implementing web and desktop applications across various industries. Specializing in React, TypeScript, and Node.js, Tomás has developed complex transactional systems, such as a desktop ticketing system for Exomindset and a full-stack administrative platform for Farmacia Alto Palermo, showcasing his capability to manage high-frequency transactional flows and API integrations effectively. His technical repertoire includes extensive use of Electron for desktop applications, React Query for optimized data synchronization, and Material UI for consistent UI design. Additionally, Tomás is skilled in backend technologies, utilizing Express.js and PostgreSQL to create scalable server-side solutions. His projects also demonstrate a strong command of full lifecycle development, from conception through deployment, leveraging modern cloud hosting services and ensuring robust application performance. His educational background in both web development and music composition adds a unique perspective to his approach to user-centric and aesthetically pleasing application design.

Meet Tomás F.

"Introduce Yourself"

"What are you looking for in your next opportunity?"

Assessment Scores

General Coding and Video Assessment

90%

Great score on Count Subarrays with Sum Equal to K, Difficulty Easy

Great score on Client-Side Authentication Failure Investigation, Difficulty Medium

Great score on Discuss the Advantages of Context API vs. Redux in React, Difficulty Hard

Problem Solving Assessment

91%

Great score on Reverse Digits of a 32-bit Integer, Difficulty Easy

Great score on Word Search in Grid, Difficulty Medium

Great score on Validate Parentheses in a String, Difficulty Hard

Experience

Exomindset

E-Commerce

Frontend Developer

Full-Time

Jun 2025 — Apr 2026

Owned the frontend development of a production desktop ticketing system used by physical box office agents as part of an integrated event sales ecosystem (backoffice platform, online store, and PDA validation app).

Designed and implemented modular UI architecture using React and TypeScript, building reusable components for high-frequency transactional flows.

Developed complex sales workflows including authentication, ticket selection, cart management, dynamic pricing, filtering systems, delivery/return flows, and cash register closing modules.

Integrated REST APIs using React Query with caching strategies to optimize data synchronization and reduce redundant network requests.

Created reusable custom hooks and structured a scalable service-layer architecture for API communication.

Focused on UI consistency and usability using Material UI within an Electron-based desktop environment.

Implemented thermal printer integration, generating pixel-perfect PDF tickets and handling hardware communication within the Electron environment.

Contributed to a Next.js-based admin dashboard by implementing a new reporting page for print history, including data table rendering and filtering logic.

Technologies:

React

TypeScript

Electron

React Query

Material UI

Next.js

Farmacia Alto Palermo

HealthTech

Full Stack Web Developer

Full-Time

Oct 2024 — Nov 2024

Designed and developed a full-stack administrative platform for managing customers and healthcare plans.

Built secure authentication flows and implemented complete CRUD operations for client and plan management.

Designed RESTful APIs using Node.js and Express, connecting a React-based frontend with a PostgreSQL database.

Implemented a transactional points accumulation and redemption system tied to customer data records.

Managed the full development lifecycle independently, from database design to deployment.

Handled deployment and environment configuration using cloud hosting services.

Technologies:

React

Redux

JavaScript

Reactstrap

Node.js

Express

PostgreSQL

Sequelize

Netlify

Railway

Getback

Enterprise & SaaS

Full Stack Web Developer

Full-Time

Mar 2023 — Oct 2023

Contributed to the development of a reverse logistics SaaS platform used by e-commerce businesses to manage product returns and exchanges.

Built and maintained multi-step transactional forms embedded into client websites for return/exchange processing.

Developed administrative dashboards for operations tracking, customer management, and return workflow monitoring.

Integrated third-party platforms such as VTEX, WooCommerce, and WordPress to extend return automation capabilities.

Debugged production issues using API inspection and structured logging with Winston, reviewing logs in AWS CloudWatch to identify and resolve backend and integration errors.

Collaborated in QA and testing processes to ensure system reliability and smooth user experience.

Technologies:

React

TypeScript

JavaScript

Redux

Node.js

Express.js

PostgreSQL

Sequelize

VTEX

WordPress

WooCommerce

Projects

Accounts Payable App

Demo

A full-stack invoice and payment management application inspired by Ramp and Melio. Enables billing teams to create, approve, schedule, and pay vendor invoices with full PDF attachment support, role-based access control, and a clean dark-themed UI. Stack: React, TypeScript, Tailwind CSS, Redux Toolkit, Node.js, Express, Sequelize, PostgreSQL.

Universo Tickets Desktop App

Demo

Frontend developer on a production desktop ticketing system built with Electron and React, used by box office agents for real-time ticket sales. Implemented reusable component architecture and complex sales workflows, including authentication, filtering, cart management, and transactional flows. Integrated REST APIs using React Query and designed a scalable service-layer architecture for data handling. Stack: React, TypeScript, Electron, React Query, Material UI.

PharmaCareCRM

Demo

Ongoing full-stack pharmacy CRM platform developed in collaboration with a real pharmacy operation since 2024. Designed to support chronic patient follow-up, prescription renewal management, and operational workflows through administrative dashboards, prescription tracking, activity timelines, notification systems, drag-and-drop follow-up boards, and KPI reporting tools. Responsible for the complete software lifecycle including requirements analysis, database modeling, REST API architecture, authentication, frontend implementation, deployment, testing, and continuous product iteration based on real operational feedback. Built with React 19, TypeScript, Redux Toolkit, Tailwind CSS, Node.js, Express, Sequelize, PostgreSQL, and JWT. Deployed using Vercel and Railway.