Ronaldo Lemos

Experience

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  Mu World

  Jul 2009 - Sept 2011

  Software Developer

  Managing a online game like Mu Online. Developing web tools using PHP e MS Sql Server. Increasing the game with features using C++.

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  Fazenda Mutuca

  Jan 2012 - Jan 2014

  Software Developer

  Developing a desktop tool to manager cows and reproduction. Bills to pay and receive. Do the accounting. Developing a website to show products from the farm.

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  FREELANCER

  Jan 2014 - Sept 2015

  Software Developer

  Developing web tools using ASP.NET C# with Bootstrap to interface. Built an app to buy material for schools.Built an corporate social network using ASP.NET C#.Built an scientific research manager using ASP.NET C#.

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  Woli Consultoria e Treinamentos

  Oct 2015 - Aug 2016

  Software Developer

  Developing web tools using VB.NET and ASP.NET with Bootstrap to interface. Developed an app to take courses online and offline. Developed an enterprise social network. Rebuilt a core system using C#.NET.

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  Woli

  Aug 2016 - Feb 2017

  Software Developer

  Developing web tools using VB.NET and ASP.NET with Bootstrap to interface. Developed an app to take courses online and offline. Developed an enterprise social network. Rebuilt a core system using C#.NET.

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  AtendUP Brasil

  Jan 2017 - Feb 2020

  Software Developer

  Developing an ERP for restaurants and snack bars using C#.NET and ASP.NET. Developed an app like ifood using Cordova for the older version and React Native for the new version.

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  Woli

  Mar 2019 - Feb 2021

  Senior Software Developer

  Developing web and mobile tools using the entire .NET architecture and Javascript.Developed a recruiting web application using React Js and .NET C#.Developed a mobile application using React-Native for the merchant to take courses offline. This app could download and manage files locally so the user can watch the classes offline and then sync the progress with the server when it becomes online again. The entire backend was made using C# .NET and SQL Server.Making projects using React and React-Native for front-end and .NET CORE to back-end building REST APIsXamarin and Cordova apps maintenanceMigrated an old WebForm application in VB6 to an MVC5 Web Application using C#. Show less

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  Polifrete

  Aug 2019 - Aug 2020

  Senior Software Developer

  Developing Web and Mobile tools for transportation areas.Built a Web application in Angular to manage all the deliveries and all truck drivers.Developed a React-Native mobile for the drivers to get the deliveries, manage their deliveries, transfer the payment received, and track the drivers in real time whenever they have an active delivery. Built the back end using NodeJs with GraphQL.

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  BRASIL POR DENTRO

  Sept 2020 - Dec 2023

  Software Engineer (Personal Project)

  Build and maintain services to sell handmade products from small farms producers directly to the client.Build one app using React Native with Expo available for Android and iOS.Build a web application using React to manage orders workflow, clients and products.Build an API using node, GraphQL, and MS SQL Server to serve as a backend for both front-end applications. Integrated with an ERP called Bling and one Payment Gateway named ASAAS. Integrated with SQS and Lambda to process distributed routines. Show less

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  BTG Pactual

  Feb 2021 - Sept 2022

  IT Analyst

  Maintaining desktop software using VB.NET and SQL ServerMigrating legacy desktop software from Windows Forms using VB.NET to a React JS web application.Developing APIs using .NET Core, Entity Framework, SQL Server, Docker, and KubernetesMigrated some Windows Services to AWS Serverless architecture (SNS, SQS, and Lambda)Developing pipelines using Microsoft Azure.

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  Checkout.com

  Oct 2022 - now

  Software Engineer

  Build highly distributed applications using .net core and aws services (SNS, SQS, Lambda, Kinesis, S3, ECS, ECR, KMS, Secrets Manager, and Artifacts) for dispute processing. Create integration and acceptance tests using node.Integrate services with the main card schemes (Visa and MasterCard).Migrated CI pipelines from TeamCity to GitHub Actions.Created build pipelines using Cake to build multi-platform docker images to the projects work on ARM64 and AMD64 environments.Worked on integration with MasterCard to make resolving disputes against the merchants easier. The merchant can resolve the dispute quickly by paying a small fee. Used .net core for all services created and extended. Used kinesis for events and SQS to send messages. The database is MS SQL Server.Created an integration with Visa to manually represent possible friendly fraud disputes, where we used past transactions from the client against the merchant with some specific information that may indicate a case of friendly fraud. Used .net core for all services created and extended. Used kinesis for events and SQS to send messages. The database is MS SQL Server. Show less