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Gabriel – React, Typescript, AWS, experts in Lemon.io

Gabriel

From Brazilflag

Full-stack Web Developer|Middle

Gabriel – React, Typescript, AWS

Gabriel is Middle full-stack developer with over 6 years of commercial experience building products with Node.js, React, TypeScript, AWS, and SQL/NoSQL databases. He has led end-to-end development of multiple products from scratch, including email verification solutions with integrated payment logic at one of the companies. His background includes cloud infrastructure, AI tooling, and hands-on work with RAG and LLMs, using tools such as Mistral CR, PGvector, and OpenAI models!

9 years of commercial experience in
AI
Construction
E-commerce
Logistics
Marketing
Tourism
Email clients
SaaS
Main technologies
React
6 years
Typescript
4 years
AWS
4 years
Node.js
6 years
Next.js
3 years
Additional skills
AI
Redis
RAG
LLM
PostgreSQL
Vercel
SQL
Tailwind CSS
Ruby
OpenAI
Direct hire
Possible
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Experience Highlights

Senior Full-Stack / Lead Engineer for core business technology initiatives
Jul 2023 - Sep 20252 years 1 month
Project Overview

An equipment solution provider dedicated to improving heavy equipment distribution through technology and personalized service. Unlike traditional local dealerships, they operate as a partner that sources equipment from multiple manufacturers worldwide to find the best fit for each customer's specific needs.

Responsibilities:
  • Led the development and deployment of the Machinery Partner Operational System (MP OS).
  • Centralized fragmented data from multiple low-code platforms into a unified source of truth, significantly enhancing data reliability, including dynamic website content generation, inventory management, ERP, and CRM integrations.
  • Acted as a Lead engineer in an innovative squad dedicated to developing AI-driven products, focusing on advanced customer data aggregation and creating a natural-language searchable knowledge corpus employing state-of-the-art Retrieval-Augmented Generation (RAG) methodologies and Large Language Models (LLMs).
Project Tech stack:
React
Next.js
Node.js
PostgreSQL
Typescript
Hubspot
OpenAI API
Claude LLM
RAG
LLM
Mistral LLM
Senior Full-Stack Engineer
Aug 2021 - Jun 20231 year 9 months
Project Overview

An all-in-one software platform built by tour operators for tour and activity providers. It automates essential business functions, including 24/7 online bookings, payment processing, and inventory management, to help businesses scale efficiently. The system features integrated digital waivers and automated marketing tools to nurture leads and collect customer reviews.

Responsibilities:

• Developed key features: tour add-ons, interactive tour calendar for booking availability. • Implemented the payment gateways integration and invoice processing service optimizations. • Handled the Online Travel Agency (OTA) integrations.

Project Tech stack:
JavaScript
Typescript
React
Angular JS
Node.js
MongoDB
Redis
PostgreSQL
Amazon EC2
Amazon S3
AWS Lambda
Amazon CloudFront
Amazon SQS
Full-Stack Developer
Dec 2019 - Sep 20211 year 8 months
Project Overview

One of the most accessible and fastest email validation services in the world. It provides fast validation for email lists (e.g., email campaign leads) and real-time validation for online forms.

Responsibilities:
  • Conceptualization and development of new products (full-stack).
  • Worked on the infrastructure and codebase-wise optimizations to handle more API load.
  • Provided the implementation of recurrent payments with subscriptions.
Project Tech stack:
JavaScript
React
Redux
Redux Saga
React Hooks
Node.js
MongoDB
Redis
Nginx
Cloudflare
HTML
CSS
Puppeteer.js
Full Stack Engineer (former TheChecker team member)
Feb 2021 - Sep 20217 months
Project Overview

An email toolbox service that provides multiple features relevant to the email world. It is a platform for detecting errors in email deliverability, reducing risk, and enriching data with scalable solutions.

Responsibilities:
  • Was a Lead Developer of the merge operation of 2 infrastructures, after the company acquired the former.
  • Merged technologies and products of both companies.
  • Created migration tools for the former product's users.
  • Provided the infrastructure changes for maintaining a seamless experience for API users during the migration.
  • Developed CRM integrations for the new company.
Project Tech stack:
JavaScript
React
Redux
Redux Saga
Node.js
MongoDB
Redis
Ruby on Rails
Sidekiq
AWS
Amazon EC2
Amazon S3

Education

2019
Systems Engineering
Bachelor's

Languages

Spanish
Intermediate
Italian
Pre-intermediate
Portuguese
Advanced
English
Advanced

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