Guilherme de Assis dos Santos

iOS Developer @World IT

Backend DeveloperWeb DeveloperFrontend Developer✔️ ITiOS Developer

Guilherme de Assis dos Santos is a talented iOS Developer at World IT Company. With extensive experience in creating innovative and functional iOS applications, Guilherme specializes in enhancing software performance and efficiently identifying and fixing bugs. His deep technical expertise and problem-solving skills ensure the delivery of high-quality, user-friendly applications. iOS Development Expertise Guilherme excels in implementing new features using Swift and UIKit, as well as maintaining legacy code, always following best practices in software architecture and design. At PagBank, he played a crucial role in code modularization and performance improvement, significantly reducing build time and memory consumption. At Farfetch, he was involved in continuous maintenance and improvement of the app, implementing unit and snapshot tests to ensure product stability and quality. His experience at Bee Engineer prepared him to work in agile and dynamic environments, focusing on delivering efficient and elegant solutions. Versatility with React Native and Web Development In addition to his iOS competencies, Guilherme has solid experience with React Native, enabling him to develop high-performance hybrid applications. While freelancing for Tookkan, he improved the project architecture, implemented new features, and fixed bugs, always aiming to optimize performance and usability. His career also includes significant contributions to web development. At Nubank, Guilherme developed a new portfolio and risk analysis platform using React and Typescript, efficiently integrating REST APIs. These skills ensure he has a comprehensive understanding of software development, from robust backend to intuitive frontend. Why Choose Guilherme? • Technical Excellence: Deep knowledge in iOS development with Swift and UIKit, along with expertise in React Native and web development with React and Node.js. • Quality Focus: Committed to writing clean, modular, and scalable code, ensuring applications are robust and easy to maintai

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Work Background

worldITiOS Engineer

Feb. 2024Lisbon, Portugal

We Do RemotelyMobile Developer

Jan. 2024 - Jun. 2024

Bee Engineering ICTiOS Engineer

Jun. 2023 - Jan. 2024Porto, Portugal

We Do RemotelyiOS Developer

Dec. 2022 - Jan. 2024In my role, I played a key part in crafting new features, resolving bugs, and enhancing internal modules. I thrived in collaborative code reviews, fostering a culture of continuous improvement. Additionally, I actively contributed to weekly and daily meetings, providing valuable insights and progress updates to the team. I also participate in code modularization, resulting in improved performance and reduced build times. I conduct memory usage analysis to reduce consumption and improve the final application's performance.

We Do RemotelyMobile Developer | Tookkan

Apr. 2022 - May. 2023Responsible for improving the project's architecture, automating deployment, creating pipelines, implementing new features, and fixing bugs. I have also been involved in refactoring the entire user interface, implementing design patterns, creating reusable components, and identifying and removing errors and warnings. My experience includes working with technologies such as React Native, Expo, Typescript, and Gitlab.

LinkeriOS Engineer

May. 2022 - Dec. 2022São Paulo, BrasilAs part of the transfers team, I worked on implementing new features, identifying and resolving bugs, and writing unit tests. I played an active role in updating and refactoring legacy code, implementing MVVM as our code standard, and writing the initial unit tests towards our goal of achieving 100% coverage. I also implemented code improvements that reduced code repetition when creating new view code screens with UIKit. Technologies used: UIKit, RXSwift, Swift, Git.

PagSeguro PagBankiOS Software Engineer

Jan. 2021 - May. 2022São Paulo, BrasilI worked in the investments team, responsible for developing and maintaining the fixed income investment flow. I participated in modularizing the entire investment flow, including asset portfolio, fixed income, variable income, and investment funds. I also helped in the development of the environment selector, allowing us to switch between QA and Mock environments without depending on a specific environment for development. I implemented new features such as automatic reinvestment of CDB titles, code improvements, and code reviews. I actively participated in refining business requirements, allowing me to contribute to the product even before it reached the development phase.

PagSeguro PagBankFront-End Software Engineer

Jan. 2021 - Mar. 2021São Paulo, BrasilIn the investment support team, I participated in the creation of the MVP of a back-office portal and actively worked on the final product, contributing to the definition of architecture, code standards, and lint rules. We used a modular architecture, aiming at the possible future separation of the project. This approach allowed us to keep each module communicating with the other without depending on it and thus facilitating separation into micro front-ends. I also participated in the implementation of continuous integration tools such as Jenkins.

NubankAssociate Front End Developer

Dec. 2019 - Jan. 2021RemotoWhile working at Easynvest, I was involved in the Risk project, building a new platform for portfolio and risk analysis from scratch, including the feature of position liquidation. The development was done using React and Typescript, and the integration with REST APIs was performed through a JS SDK developed specifically for this project.

Automotion Ind. Com. Imp. Exportação Ltda.Desenvolvedor full stack

Jul. 2018 - Dec. 2019BoituvaI was responsible for developing the company's new website, which included managing suppliers and products through an administrative panel. I worked directly on improving the website's performance and SEO. I implemented the entire backend using Node.JS and MySQL as the database, and was also responsible for maintaining the production environment and performing code deployments. I developed an Electron.JS application that allowed managers to track metrics using widgets, without having to access the ERP, which was time-consuming to apply filters. This application reduced the time it took to perform initial analyses. Technologies used: React.js, Javascript, Node.js, Git, Electron.js, Next.js.