Logo
Alexandre – Node.js, Angular, React, experts in Lemon.io

Alexandre

From Brazil (UTC-3)flag

Full-stack Web Developer|Senior
Lemon.io stats
9
projects done
3161
hours worked
2
offers now 🔥

Alexandre – Node.js, Angular, React

Alexandre’s current expertise is mainly focused on MERN and MEAN stacks. However, this candidate has also contributed to some projects as a DevOps consultant, an architect, as well as successfully handled a Tech Lead position. His ultimate dream is to delve even deeper into the world of AI, as he already has around 2 years of commercial experience in Deep Learning.

11 years of commercial experience in
Accounting
Administration
Adtech
Advertising
AI
Analytics
Blockchain
Business intelligence
Cloud computing
Cryptocurrency
Data analytics
E-commerce
E-learning
Edtech
Fintech
Information services
Job and career services
Media
Real estate
Retail
Social media
Supply chain
Trade
AI software
Enterprise software
Graphic software
Platforms
Web3
Main technologies
Node.js
9 years
Angular
7 years
React
7 years
Typescript
6 years
AWS
5 years
AI
2 years
Next.js
4 years
Additional skills
DynamoDB
MongoDB
Cognito
DevOps
Amplify
Database design
Express.js
PostgreSQL
Amazon S3
Vercel
AWS Lambda
Amazon ECS
Firebase
Docker
OpenAI
GitHub Actions
Nest.js
Kubernetes
Supabase
GraphQL
Python
Twilio API
Amazon RDS
AWS CloudFormation
Chat bots
Cursor
Amazon SQS
Amazon SNS
MongooseODM
Make
Rewards and achievements
Client's favourite
Testimonials
#12921172013Mid-Sr full-stack developer| 20h/week| US

"Alex did a fantastic job and delivered great features to the project. Thank you for your help with finding Alex! "

#14789496962Senior FS (React, TS, Node, Postgres, BigQuery, Airflow) | full-time/part-time | 3 months

"All is good here - Alex is crushing it for us! We’d like to send Alex a little Christmas bonus for all of his hard work. "

Direct hire
Possible
Ready to get matched with vetted developers fast?
Let’s get started today!

Experience Highlights

Senior Full-stack Developer
Oct 2025 - Nov 20251 month
Project Overview

An app to manage calls from a call center, where, from a business standing point, the user accessing the app could see lots of complex reports being imported from QuickBooks where the agents were picking up calls and calculating these minuting formulas and generating automated invoices, saving the stakeholders time of managing and creating that on their own.

Responsibilities:
  • Created complex reports for future forecasting;
  • Created module where the stakeholders could foresee and based on past calculations, they could see the future earnings in a complex projection;
  • Created the invoicing automation that pulls in minuting data from the call center and calculate it in order to bill clients proactively and with no manual user interaction;
  • Prepared the app for regression proof and complex data migration whenever needed as it was needed to replace the call center main calling app;
  • Built up efficient queries where it was needed to pull in complex report visualization and then in that case, needed to build an aggregation query that could return me a better data view so I should only display the report with the data as demanded.
Project Tech stack:
Next.js
React
MongoDB
AWS
Linux
Vercel
Senior Full-stack Developer
Aug 2025 - Sep 20251 month
Project Overview

Application business core was to have both cosignors and cosigned products managed by a single application. Within this app, the users could cosign products and sell the just cosigned products within their store by using the app provided by the company to sell cosigned products and automatically routing the money to the right agents.

Responsibilities:
  • Implemented testing culture in the company and the development team;
  • Helped the team to improve overall app documentation for future hires and the culture of documenting deliverables;
  • Helped the CEO to see the value coming from the development deliveries by seeing the app functioning and well tested by its developers;
  • Added testing automation to prevent regressions;
  • Helped the team to enhance confidence on having well documented steps to actions that have been taken, so anytime needed, knowledge was decentralized and documented.
Project Tech stack:
React
Nest.js
Node.js
AWS
Agile
Jira
GitHub
GitHub Actions
CI
CD
Cursor
AI
Shopify
Next.js
API Testing
Functional Testing
Integration Testing
Manual Testing
Regression testing
Senior Full-stack Developer
Mar 2024 - Nov 20248 months
Project Overview

This is a forum where crypto investors share powerful insights about the crypto world and drive changes based on what they are overseeing in the crypto world. Users are allowed to become members of the forum, where they can see restricted content, which tends to be more premium content posted to members only. Users also have the option to remain public users, which does not have any premium features.

Responsibilities:
  • Created mobile-first designs;
  • Created curation modules for Twitter posts and the backend for them;
  • Created server-side rendering components along with client-side rendering components alternatives for the Twitter modules;
  • Wrote unit tests for all components created;
  • Integrated multiple third-party tools for analytics and error monitoring, such as sentry, posthog and hotjar;
  • Helped create a team approach to work so they could build a sustainable development cycle for the whole team;
Project Tech stack:
React
Next.js
Sentry
Node.js
Cloudflare
Supabase
Docker
Tailwind CSS
Vercel
Vercel Postgres
Typescript
Senior Full-stack Development
Jun 2024 - Oct 20244 months
Project Overview

An app designed to publish any sort of AD and campaigns through social media integrated in a single place, where the goal was to have campaign and paid traffic managers to have their subscription to the app and manage their social media campaigns.

Responsibilities:
  • Implemented the META integration with the app where through the platform, the user could publish video ADs on YouTube and meta;
  • At YouTube, along with another developer, implemented automations to, using Puppeteer, access the page as a bot and do step-by-step publishes until the user could get his video posted in an ad campaign;
  • Created and modified campaign collection in order to enhance the app performance to store all needed social media references and update them as needed to publish multiple campaigns to all different social medias.
Project Tech stack:
Nest.js
Remix
CI
CD
Puppeteer.js
Facebook SDK
Kanban
MongoDB
Senior FullStack developer
Jul 2024 - Sep 20241 month
Project Overview

A startup to help companies using workday from Microsoft to have their own workday specialized ChatGPT alike software. Quality is proven having specialized professionals evaluating the AI answers.

Responsibilities:
  • Created the chatbot experience;
  • Created the answer and professional manual answer evaluation;
  • Created the onboarding experience for a first joining professional adding changes to its profiles in real time;
  • All queries with the DB were already built, Alexandre just had to organize the client versus server requests in a way he did not overload the server with useless frontend calls, as this was a chatbot application.
Project Tech stack:
React
Next.js
OpenAI
Chat bots
Tailwind CSS
Material UI
Figma
MongoDB
Senior Front-end Developer
Feb 2024 - Mar 20241 month
Project Overview

This is a website where users can trade and swap Ethereum cryptocurrencies for wrapped Ethereum, facilitating both short and long transactions. Additionally, the platform ensures low energy costs and increased liquidity for traders. The entire website is based on Uniswap.

Responsibilities:
  • Created complex front-end visuals and experiences to speed up the development process;
  • Created pools area along with the crypto details screen, enhancing the user experience.
Project Tech stack:
Next.js
Supabase
AFNetworking
Agile
Ethers.js
GraphQL
MongoDB
Typescript
Senior Full-stack Developer
Jul 2023 - Feb 20247 months
Project Overview

Their internal product aims to help digital marketers in the music industry to help them promote their artists in a way that speeds it up and turns their work creating ad campaigns and ads in all social media one click away.

Responsibilities:
  • Created front-end and back-end features along with architectural improvements;
  • Created all features in regard of ad integrations to META (FACEBOOK);
  • Created front-end components to enable the platform usage with ease of operation;
  • Improved the team process with tasks and work documentation based on business approval and acknowledgment;
  • Helped the team to better create a local environment by actively creating policies and suggesting improvements;
  • Created the main foundation for the entire campaign automation architecture;
  • Helped to create the data schema structure in a way we could re utilize all schemas for different social media connections.
Project Tech stack:
React
Express.js
Node.js
Typescript
MongoDB
CI
CD
GitHub
Jira
GitHub Actions
Full-stack Developer
Jan 2023 - May 20233 months
Project Overview

The platform where investors look out for buying new companies or properties from the public web or internally published companies/properties. It uses integration with OpenAI to generate value and organize data to better describe to an investor why he should purchase companies or properties listed by the platform.

Responsibilities:
  • Created evaluation tools for companies and properties;
  • Created a file storage to enable users to communicate by sending files to each other;
  • Created a thread discussion ability to enable sellers to actively to communicate with buyers while requesting business information from one to another;
  • Created and enhanced views to enable users to actively create and customize checklists for business evaluation;
  • Designed the entire data schema for the app in a way we could achieve the best performance as possible by simplifying loaded data versus storing it smartly.
Project Tech stack:
React
Next.js
Node.js
Vercel
Heroku
GitHub
Amazon S3
React Query
Tailwind CSS
Typescript
MongoDB
Tech Lead and Full-stack Developer
Nov 2020 - Jun 20221 year 7 months
Project Overview

The company's main business model is selling 3D models to e-commerce and retailers. The page that can be found via a provided link demonstrates how an e-commerce dashboard full of products would look like with their 3D models and how beneficial it is to enrich the customer experience with 3D applications. The application has facial recognition solutions to dispose of 3D glasses using cellphone cameras and web cameras, using facial recognition neural networks. The 3D effects are built based on Three.js. Also worked with WebGL to inject assembly code to make the graphics rendering softer to the graphics card running within the browser.

Responsibilities:
  • Created Front-End and Back-End first API and client relationship design;
  • Implemented an AI solution for face recognition and for the disposal of 3D models with face recognition;
  • Worked on the AI Development and Research team and led the team for over a year, overseeing the production of the first prototypes;
  • Created internal features for retailers and customers;
  • Contributed with the embeddable content to import scripts and reuse technologies to display 3D models and their galleries in lightweight code.
Project Tech stack:
React
AWS Lambda
Amazon Cognito
DynamoDB
Node.js
Amazon ECS
Tailwind CSS
Three.js
WebGL
Remix
MongoDB
Typescript
Senior Full-stack Developer
Jul 2021 - Jan 20226 months
Project Overview

In the context of the client-business relationship, the client had multiple systems for doing almost the same process but aimed at different products. One system managed the service's provision and the other - products. This product was a unified system created to address every income-source kind of product, such as services and individual products, all in one place.

Responsibilities:
  • Created microservices to manage products and services, integrating database translation from both legacy databases;
  • Implemented ETL microservice to translate no relational data to PowerBI relational data;
  • Worked on the code flow to build a system with fewer requests per needed interaction. Made all data load under even driven architecture or sockets since every product needed to be asynchronously dependent on a single interaction instead of multiple access to each product's data;
  • Created CICD pipelines using Azure DevOps for each repository, connecting them to each cloud provider;
  • Created environmental variables segregation to support multiple environmental deployments.
Project Tech stack:
Angular
Node.js
Apache Airflow
BigQuery
Azure DevOps
Active Directory
MongoDB
Typescript
Senior Full-stack Developer
Feb 2018 - Jul 20213 years 5 months
Project Overview

The system is a digital technology hub and a space for mentor-mentee relationships. Whoever is a part of the system, decided to learn more about a specific topic, and wants to have a technical mentor, could select the stack and the availability and start the matching process with possible mentors.

Responsibilities:
  • Created the matching criteria;
  • Worked on the database segregations based on nations and time zones so that common schedules could be created based on the local time zone;
  • Created integrations with third-party solutions providing enhanced code detections and clean code maintainability;
  • Wrote unit tests for all microservices;
  • Created CICD pipelines using Azure DevOps for each repository, connecting them to each cloud provider;
  • Created environmental variables segregation to support multiple environmental deployments.
Project Tech stack:
Angular
Node.js
PostgreSQL
Azure DevOps
Active Directory
MongoDB
Express.js
Docker
Kubernetes
Microsoft Azure
Azure SQL
Typescript

Education

2018
Information Systems Bachelor
Bachelor's
2014
Computer Networks
Technician

Languages

Spanish
Advanced
Portuguese
Advanced
English
Advanced

Hire Alexandre or someone with similar qualifications in days
All developers are ready for interview and are are just waiting for your requestdream dev illustration
Copyright © 2026 lemon.io. All rights reserved.