Pedro Martins Timóteo da Costa, Software Developer in São Paulo - State of São Paulo, Brazil
Pedro Martins Timóteo da Costa

Software Developer in São Paulo - State of São Paulo, Brazil

Member since January 2, 2017
For the past six years, Pedro has been developing software with .NET and related technologies. Along with being a Microsoft C# specialist and a Xamarin certified mobile developer, Pedro is extremely motivated and passionate about creating great apps that truly help and bring results to the clients and end-users.
Pedro is now available for hire




São Paulo - State of São Paulo, Brazil



Preferred Environment

Git, Visual Studio, Windows

The most amazing...

...thing I've coded was a mobile application with a dynamic UI and business rules, based on configurations defined in a legacy ERP.


  • Software Engineer

    2019 - PRESENT
    • Implemented caching on an application to increase response time by 10x and ensured stability during Black Friday.
    • Helped to design the decoupled micro-services architecture for migrating our mail-marketing platform.
    Technologies: Amazon Web Services (AWS), JavaScript, HTML, Octopus Deploy, TeamCity, AWS, ASP.NET Core, .NET Core, C#
  • Software Engineer

    2019 - 2020
    Epirion Knowledge Solutions
    • Helped to create a C# library to allow querying and sending commands to Windows and web elements using the same API.
    • Created a Windows application using WPF to scrape applications and web pages and show their elements and properties in a tree-view format.
    • Used parallelism and asynchronous programming to make the application faster and responsive.
    • Implemented several non-trivial features like using the mouse position to locate elements on the tree and showing borders around the element.
    • Used a TDD approach for designing most of the application features to ensure stability when adding new code.
    Technologies: Automated UI Testing, C#
  • RPA Developer

    2018 - 2019
    • Developed several software bots to automate different types of laborious tasks on multi-billion dollar company.
    • Created integrations with Veracode to automatically scan our deployment packages, greatly speeding up our development process.
    • Worked as the main developer to automate several steps of end-of-year tax declaration, saving at least 160 hours of manual work.
    • Developed automation process for automating cash processing for a department, saving several hours of manual labor every month.
    • Served as reference developer for junior developers, providing several workshops on topics like SOLID and TDD.
    • Used SignalR to create integration that allows triggering our bots by sending a command to a chat bot.
    Technologies: JavaScript, CSS, HTML, C#
  • Freelance C# and .NET Developer

    2018 - 2018
    SennaLabs (via Toptal)
    • Supported a Windows batch application that reads a messaging queue and trade stocks accordingly to the message.
    • Created a desktop application for managing multiple clients for the messaging queue, enabling faster processing of the received messages.
    • Enabled the application to be able to process multiple requests by correctly applying the Garbage Collector and Object Lifecycle fundamentals.
    • Created an installer for the application using the WiX Toolset.
    Technologies: WiX, RabbitMQ, .NET, C#
  • Freelance Full-stack .NET Developer

    2018 - 2018
    Patrick Philipp (via Toptal)
    • Designed and implemented REST API following the OData standards using the ASP.NET WEB API.
    • Created a client application using Angular.
    • Implemented the Builder design pattern to create an OData client with Angular and TypeScript.
    • Developed a generic controller with ASP.NET WEB API, that defines basic operations like CRUD and batch creation.
    • Created a feature that allows users to control multiple levels of access for all of the application's screens.
    • Implemented JWT-based authentication with refresh tokens.
    • Created reusable Angular component to allow easier CRUD operations through multiple entities.
    • Implemented the use of lazy-loading on routes to make the application faster.
    • Created reusable Angular components to encapsulate third-party components, therefore avoiding code repetition at the component's configuration.
    Technologies: Bootstrap, OData, Entity Framework, TypeScript, Angular, ASP.NET Web API, C#
  • Software Developer

    2017 - 2018
    TaxWeb Compliance Fiscal
    • Created a build process for the visual studio team services that greatly minimized the time to create the installer for a desktop application.
    • Developed a functionality for creating and configuring a Windows schedule to import large amounts of XML files to a SQL Server database.
    • Optimized the legacy code that was taking days to finish its execution and made it finish in 30 minutes, just by applying the correct data structures to that scenario.
    • Refactored very convoluted code into reusable pieces using SOLID principles.
    • Created features for identifying problems with the client's tax compliance.
    Technologies: Ruby on Rails (RoR), Ruby, Visual Studio, Oracle, Microsoft SQL Server, VB.NET, C#
  • Mobile Developer

    2016 - 2017
    Capta Tecnologia
    • Created Android apps using Xamarin to integrate with a large legacy ERP built by the company.
    • Developed a REST API to provide data to mobile applications.
    • Built sockets to enable the real-time communication between an Android application and a legacy back-end.
    • Developed a feature for a mobile app to dynamically create screens and validate business rules based on a back-end configuration.
    • Created a generic CRUD architecture in a WPF application—making it trivial to create CRUD for new entities.
    • Integrated an Android application with external libraries and devices in order to enable credit and debit card payments in the application.
    • Integrated an Android application with different barcode-reader devices.
    Technologies: Microsoft SQL Server, Entity Framework, Windows Presentation Foundation (WPF), ASP.NET Web API, Xamarin
  • Web Developer

    2014 - 2016
    • Developed a web application to manage employee timeslots and what projects they were working on.
    • Deployed ASP.NET MVC applications to IIS servers.
    • Created PL/SQL queries to generate the tax obligations files that are sent to the Brazilian government.
    • Used third-party libraries to create reports in PDF and Excel.
    • Automatized the clients' processes by doing HTML screen-scraping by using VB.NET.
    Technologies: PL/SQL, Entity Framework, Microsoft SQL Server, Bootstrap, jQuery, ASP.NET MVC, C#
  • Junior Software Developer

    2012 - 2014
    Paicon Technologies
    • Developed integrations between multiple legacy systems and a Microsoft Dynamics CRM 2011 application.
    • Optimized a series of T-SQL queries used in business reports.
    • Created a functionality to allow managers to edit users' access.
    • Developed custom workflows for Microsoft Dynamics CRM 2011 using C#.
    • Developed a C# application to read an inbox and normalize it in order to allow it to be inserted in a SQL Server database.
    Technologies: T-SQL, jQuery, ASP, ASP.NET MVC, VB.NET, C#


  • Capta | App Vendas (Development)

    • A Xamarin Android app that integrates with a legacy ERP
    • Designed and implemented the MVVM architecture using MvvmCross.
    • Developed complex screens with dynamic fields and business rules, based on a back-end configuration.
    • Used WebSockets to create a real-time communication feature that allows managers to call for an available salesperson.
    • Created a Web API to provide data for the mobile app.
    • Integrated the app with Bluetooth barcode readers—allowing much faster reads than if it was done with the cellphone camera.

  • Migration of a Sales Module from a Legacy App to a Microsoft Dynamics CRM (Development)

    • Created a C# app to migrate data from a legacy app to a Microsoft Dynamics CRM database, using the Dynamics CRM web service.
    • Developed C# code to integrate and synchronize the data between the legacy application and the Dynamics CRM database.
    • Created custom workflows for the Dynamics CRM using C#.
    • Developed a C# application to read a mailbox, extract and normalize bidding data from the emails, and ultimately insert it into the Microsoft Dynamics CRM database.

  • Compliance Management System (Development)

    • An ASP.NET MVC application for managing the delivery status of tax obligations to the government.
    • Implemented a feature for displaying a calendar with the clients' tax compliance status; for example, which obligations they need to deliver next.
    • Developed a service for sending emails with the clients' tax compliance status.
    • Created log-feature that saves every interaction that users have with the system's data.

  • Portal Medei (Development)

    • Developed features for the app using Angular 4, TypeScript, Node.js, Express, and MySQL.
    • Acted as the technical leader for the project, establishing patterns, and helping junior developers.
    • Created a reusable component to handle parent-child data.
    • Developed an additional reusable component to display validation errors.

  • Recon.Web (Development)

    • An ASP.NET MVC application that allows clients to import and manage their tax data.
    • Implemented an authorization feature with multiple levels; for example, if the user has access to a parent's record, he also has access to their child's records.
    • Implemented a data import feature that validates every record and field, displaying appropriate messages to the user in case of errors.
    • Created a generic CRUD functionality using Knockout.js, jQuery, and AJAX.


  • Languages

    SQL, HTML, C#, T-SQL, JavaScript, XML, CSS, TypeScript, VB.NET, Ruby, CSS3, HTML5
  • Frameworks

    .NET, Bootstrap, ASP.NET MVC, ASP.NET Web API, Angular, Entity, Ruby on Rails (RoR), ASP, .NET Core, ASP.NET Core, Windows Presentation Foundation (WPF), Knockout.js
  • Tools

    Microsoft Visual Studio, Git, Dapper, Visual Studio, RabbitMQ, WiX, AWS CloudFormation, TeamCity
  • Paradigms

    Test-driven Development (TDD), SOLID Principles, REST, Continuous Integration (CI), Continuous Delivery (CD)
  • Storage

    JSON, SQL Server 2012, SQLite, SQL Server Management Studio, Microsoft SQL Server, PL/SQL, AWS DynamoDB
  • Other

    IoC, Ajax, OData, Automated UI Testing, AWS, Octopus Deploy
  • Libraries/APIs

    SQLite.NET, jQuery, Entity Framework
  • Platforms

    Visual Studio Code, Xamarin, Windows, Oracle, Amazon Web Services (AWS), AWS Elastic Beanstalk


  • Associate's degree in System Analysis and Development
    2013 - 2014
    Faculdade de Informática e Administração Paulista | FIAP - São Paulo, SP, Brazil


  • Xamarin Certified Mobile Developer
    AUGUST 2017 - AUGUST 2018
  • Microsoft Specialist - Programming in C# Specialist: 70-483
  • MCP - Querying Microsoft SQL Server 2012: 70-461
    JUNE 2014 - PRESENT

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