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Raphael – React, Node.js, JavaScript, experts in Lemon.io

Raphael

From Brazil (UTC-3)flag

Full-stack Web Developer|Senior
Lemon.io stats
1
projects done
2942
hours worked
2
offers now 🔥

Raphael – React, Node.js, JavaScript

Raphael has been in the IT industry for more than 17 years, and for the last 7 of them, he has been dedicated to working with a Javascript environment. Like every full-stack developer, Raphael has his hidden preferences: he leans towards the front-end but is also no slouch in the back-end business.

It's worth mentioning that Raphael is a fan of lifelong learning: he is thrilled about an opportunity to acquire new skills and continuously deepen his expertise. He has a passion for making technology work for people and loves nothing more than solving challenges.

Raphael's extensive background as a tech teacher will greatly help when it comes to the discussion of complex topics and mentoring less experienced teammates.

19 years of commercial experience in
AI
Customer support
Data analytics
Gamedev
Govtech
Public services
Telecommunications
Transportation
Broadcasting software
Chatbots
CRM
Customer support software
Enterprise software
Mobile apps
Utilities
Gaming software
Web development
Main technologies
React
6 years
Node.js
5 years
JavaScript
8 years
Typescript
6 years
Additional skills
React Native
Tailwind CSS
Next.js
Oracle
Remix
C#
CSS
React Query
Axios
PostgreSQL
Supabase
REST API
Vercel
Redis
Prisma
OpenAI
BigQuery
Firebase
Apollo GraphQL
Nest.js
GraphQL
SQL Server
shadcn
Expo
Direct hire
Possible
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Experience Highlights

Senior Full-stack Developer
Dec 2024 - Jun 20255 months
Project Overview

A city-to-city Uber-like rideshare app that connects drivers and riders in Texas and Florida.

Responsibilities:
  • Improved bonuses and cancellation fares correctness by 40% by implementing a feature for its Admin Web App to control and log records, with React.js, Nest.js, TypeScript, GraphQL and MongoDB;
  • Reduced time for Tech Support to provide bonuses and cancellation fares by 50% by moving this feature from Retool to its own Admin App, with perceived performance, and better UI/UX with React.js, TypeScript and Tailwind CSS;
  • Helped the company to reach profitability in the last months by making its frontend and backend more stable and assertive;
  • Improved PageSpeed results by 40% by implementing SEO and Core Web Vitals improvements for the Hitch’s Web App, making it pass on both Mobile and Desktop platforms.
Project Tech stack:
React
Typescript
Node.js
Redux
GraphQL
Apollo GraphQL
Nest.js
MongoDB
Tailwind CSS
Senior Full-stack Developer
Jul 2024 - Nov 20243 months
Project Overview

Raphael worked on a game-show-like App for both Android and iOS. The App lets users participate in a contest-like game show by answering questions after watching commercials, competing for prizes.

Responsibilities:
  • Took over the App Development and made it into both Production and Android’s and iOS's App Stores in 2 months;
  • Improved its Admin Web App performance by 30% by using React with TanStack Query hooks;
  • Moved lots of App Code to Firebase, making the App more stable as it does not need too many updates anymore;
  • Implemented complex business rules to determine Sponsor Winners and Top Qualified Winners for each Contest Game;
  • Implemented a Web Admin App with Next.js that deals with CRUD operations and strategic reports as CSV files.
Project Tech stack:
React
Typescript
Node.js
React Native
Firebase
Next.js
React Query
BigQuery
Expo
Senior Software Engineer
Dec 2022 - Jun 20241 year 5 months
Project Overview

A startup focused on AI Software; the main product uses AI for inbound and outbound calls using either Twilio or Vonage as call providers. It's tailored to several types of companies, such as customer service, insurance, law, and solar. It allows the creation of AI Agents that can do all the selling process through phone calls with clients

Responsibilities:
  • Implemented stable features like several CRUD’s, Magic Bell Integration (Notifications), Clerk Integration (Auth), and API’s;
  • Made some screens faster to users by implementing caching strategies and less unnecessary requests to the server;
  • Implemented strategies on default and org-based Feature Flags with LaunchDarkly;
  • Implemented Integrations with several CRM’s like HubSpot, SalesForce and High Level with Cobalt;
  • Implemented caching strategies to retrieve data faster, reducing their most populated table load from 10 seconds to 1 second;
  • Implemented environment variables integration with Doppler;
  • Improved performance and stability of AirChat’s Workflow Editor by moving it outside of Remix flow, since it contains a lot of user interaction.
Project Tech stack:
React
Remix
Node.js
Tailwind CSS
Typescript
JavaScript
Senior Front-end, Mobile Developer
Dec 2015 - Dec 20227 years
Project Overview

It's a CRM-like web and mobile app for Brazilian state deputies that control their electorate.

Responsibilities:
  • Created a mobile app from scratch that connects to the main web API with Android and iOS;
  • Implemented several modules, such as people and enterprise contacts, requests, and birthdays;
  • Implemented image and document uploading for contacts;
  • Fixed eventual bugs.
Project Tech stack:
React
React Native
Node.js
Typescript
Expo

Education

2004
Information Systems
BS
2005
Applied Free Software
Post-graduation

Languages

Portuguese
Advanced
English
Advanced

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