rtscosta

• Used Remix to write a Solidity smart contract.
• Developed the user interface using React, Next.js, and Web3, enabling smooth interaction with Metamask.
• Implemented a CI/CD pipeline using GitHub and AWS Amplify to streamline deployment.

• Responsible for handling 7 different projects simultaneously.
• Hiring, managing, and leading a team of developers.
• Organizing and managing scrum teams.
• Conducting customer interviews and interacting with customers.
• Writing code for front-end, back-end, and database components.
• Architecting products and solutions.
• Preparing the solution to handle 150K users.
• Implementing OKRs (Dora Devops).
• Maintaining software quality with 80% test coverage.

• Responsible for coordinating and deciding the tech stack for each project.
• Sometimes coding.
• Handle all projects infrastructure, monitoring, and communication between projects.

• Microservice event-driven architecture for all services
• API GraphQL and Rest
• MongoDB and Postgresql
• Services to integrate with Marketplaces, e-commerces, and logistics
• AWS services
• Python Flask to develop the services and APIs
• Monitoring system using DataDog
• Email service using SendGrid
• SMS integration service using Twilio
• Push notification service using Firebase
• Unit test automation using CircleCI
• GitHub for saving the repositories
• Visual Studio Teams to control projects and spring
• Health-check and monitoring

• A mobile app that allows retailers to scan their products, search a catalog of over 120 million products, and receive push notifications when an event happens.
• The app also allows users to select which marketplaces they want to sell their products on, import sales data, and sync product prices and inventory.

• Front-end: React, NextJS, and React Native
• Back-end: API in GraphQL and Rest
• Database: MongoDB and Postgresql
• Infrastructure: AWS services
• Monitoring: DataDog
• Communication: SendGrid, Twilio, and Firebase
• Testing: CircleCI
• Version control: GitHub

• Microservices using event-driven architecture to communicate with external services such as marketplaces, email notification, invoices services, couriers, catalog, etc.

• Health-checks and scheduled microservices.
• Integrated with Amazon, Magazine Luiza, Mercado Livre, and B2W.
• MongoDB database.
• Connecting with Rest APIs.
• Python Flask to create the services.

• A system that scrapes websites and collects product data to build an internal catalog.
• Uses queries and AI to unify the results.
• Has helped developers import over 100 million products from different sources on the internet.

• Python Flask
• MongoDB and Postgres database
• AI to combine duplicate products and create a unique catalog
• Health-check and monitoring

• A small e-commerce platform for users who want to sell online not using marketplaces.
• Features a main page with filters and search, product detail page, checkout integrated with payment gateway Pagarme, and email status integration.
• Also integrated with Facebook, Instagram, and Google Business to list products.

• MongoDB
• React with NextJS
• Rest API in Python Flask
• Integrated with Stone Delivery APIs
• Health-check and monitoring

• A regional marketplace that lists all products from a specific city.
• Integrated with Stone logistics to get the product at the store and deliver to the local customer in that range.
• Splits each invoice for each store and controls the individual delivery.

• MongoDB
• React with NextJS
• Rest API in Python Flask
• Integrated with Stone Delivery APIs
• Health-check and monitoring

• An integration with Stone logistic service to collect products from our customers' stores and deliver them to the final user.

• Services in Python Flask integrated with Stone Logistic APIs.
• Health-check and monitoring.

• Softvar is an ERP for retail stores and ecommerce back office. The project started in the US and incorporated a companion called Pinogy, which is specialized in the pet industry. I was responsible for talking to customers and implementing new features for this new vertical, such as PetCenter, Scan Pet Microchip, Industrial Catalog, Progressive Discount System, and ERP Changes.
• The solution was designed to control inventory, point-of-sale, pick and pack, customer support, accounts payable and receivable, bank integration, multi-company, product catalog, marketplace integration, invoice control, purchase order tracking, and more.
• Responsible for handling infrastructure, back-end, front-end, and teams for the squads.
• Hired and maintained team engagement.
• Created dashboards to show team performance and deliverables.
• Responsible for creating partnerships with other companies to integrate with them.
• Created a methodology to involve the tech team with our users.
• Responsible for implementing our own e-commerce environment in-house to train new employees and show the company how our software works for customers to make improvements.
• Implemented a delegation board to give teams autonomy.

• The platform was developed as client-server.
• Main developer responsible for creating and maintaining features for the POS such as inventory control, finance, logistics, sales commission, invoices, customer relations, and purchase.

• Delphi 5-7
• MSSQL Server

• Responsible for migrating the client-server project to the web.
• Qualified the team on new technology.
• Coordinated the change with new collaborators.

• AngularJS
• .Net C#
• MSSQL Server
• Rest API

• Assumed new product management for this new industry.
• Qualified the team to extract data for special reports.
• Developed new features for the product and presented them to customers so they could interact with them quickly.
• Responsible for implementing microchip enrollment to connect with the pet insurance company and generate the contract for the pet insurance.
• Developed a software called Pet Center to control all pet vaccine and disease track records.
• Integrated with a central pet category, created in-house, to get all product information such as images, title, description, manufacturer, prices, etc. when a product was scanned in a store.

• Delphi
• MSSQL Server

4) Handheld mini ERP System

• Created a version of our ERP in Java to run on Symbol and Zebra printer handheld devices.
• The software had the following functionalities:
  • Pre-sale order: Clerks could help customers add items to a cart and print a receipt on a Zebra printer connected to the Symbol device.
  • Pre-receiving check solution: The app could scan purchase orders to verify the correct quantity.
  • Purchase order system: The app could suggest products for the manager to buy.
  • Inventory system: The app could track inventory levels and locations.

Tech Stack:

• Java
• MSSQL Server
• JDBC
• SQLite

• Database: MS SQL Server
• Backend: C#
• Front-end: AngularJS