Guilherme is available for hire
Hire GuilhermeGuilherme Pendezza de Sousa
Verified Expert in Engineering
Software Developer
São Paulo - State of São Paulo, Brazil
Toptal member since January 20, 2021
Bio
A focused developer and fast learner, Guilherme has worked in a range of applications from desktop and databases to the front end and is searching for new products and technical challenges to solve, mainly on the front-end side. He is currently focused on front end and React-related projects.
Portfolio
Pluto TV
Go, Amazon Web Services (AWS), Kubernetes, Vault, Linux, Docker...
Caelum
Sass, SCSS, Dart, CSS, Flutter, React Native, React, JavaScript, HTML, APIs...
Loft Brasil Tecnologia Ltda
ECMAScript (ES6), Webpack, Yarn, REST APIs, PostgreSQL, NestJS, Express.js...
Experience
- Git - 6 years
- React - 5 years
- Amazon Web Services (AWS) - 5 years
- JavaScript - 5 years
- TypeScript - 4 years
- Go - 3 years
- Kubernetes - 3 years
- Node.js - 3 years
Availability
Part-time
Preferred Environment
Axios, Redux, Next.js, JavaScript, React, Git, Windows, Linux, Visual Studio Code (VS Code)
The most amazing...
...system I've developed replaced a huge Excel spreadsheet. It demanded an intense interaction with the spreadsheet's owner to get all the business rules.
Work Experience
Senior Software Engineer
2021 - PRESENT
Pluto TV
- Assisted the team in gaining momentum with the Kubernetes stack while transitioning services from ECS to EKS.
- Led the complete migration of two services from ECS to EKS, specifically geolocation and user accounts.
- Launched the initial service from the team into production utilizing the EKS stack.
- Achieved CKA certification upon completing the migration efforts.
- Introduced VPN and proxy blocking functionality to the geolocation service.
Technologies: Go, Amazon Web Services (AWS), Kubernetes, Vault, Linux, Docker, Object-oriented Programming (OOP), Microservices
Instructor
2019 - 2021
Caelum
- Introduced about 20 people to software development by teaching programming logic classes.
- Taught JavaScript and React classes, introducing over 20 students to software development.
- Gave lessons in Flutter to help around ten students begin their software development journey.
Technologies: Sass, SCSS, Dart, CSS, Flutter, React Native, React, JavaScript, HTML, APIs, GitHub, HTML5, Unit Testing, Docker, Full-stack, TypeScript, Front-end Development, Front-end, CSS3, Responsive Web Design (RWD), SQL, React Hooks, Firebase, Web Development
Software Engineer
2019 - 2021
Loft Brasil Tecnologia Ltda
- Redesigned the search interface on the listings page, leading to increased conversion and generating more apartment visits.
- Implemented A/B tests to prove the business hypothesis and increase conversion.
- Pushed the test coverage to high standards together with my highly-motivated team.
Technologies: ECMAScript (ES6), Webpack, Yarn, REST APIs, PostgreSQL, NestJS, Express.js, Material UI, Redux, TypeScript, REST, Node.js, JavaScript, HTML, APIs, Jest, GitHub, Storybook, HTML5, Amazon S3 (AWS S3), Unit Testing, Docker, Cypress, Full-stack, Front-end Development, Front-end, CSS3, Responsive Web Design (RWD), Amazon Web Services (AWS), Figma, Back-end, CI/CD Pipelines, MySQL, React Hooks, Web Development, API Integration, A/B Testing, UX Design, PDF, React, Architecture, Scalable Application, Scalable Architecture, Cloud, UI Development, Object-oriented Programming (OOP), Microservices
Software Developer
2018 - 2019
Loggi
- Developed the new signup process that enabled storing partial user data and increased the sales lead capture.
- Extracted the institutional website from a Django application. Significantly improved the dev experience.
- Integrated Loggi's back end with a sales platform, Nuvemshop, to increase the demand for delivery services.
Technologies: Django, GraphQL, CSS, Redux, React, HTML, APIs, Jest, GitHub, Storybook, HTML5, Amazon S3 (AWS S3), Chrome Extensions, Unit Testing, Docker, Cypress, Full-stack, TypeScript, Front-end Development, Front-end, CSS3, Responsive Web Design (RWD), Amazon Web Services (AWS), SQL, Figma, Back-end, CI/CD Pipelines, MySQL, ECMAScript (ES6), React Hooks, REST APIs, Web Development, API Integration, A/B Testing, UX Design, Architecture, Scalable Application, Scalable Architecture, Cloud, UI Development, Object-oriented Programming (OOP)
Front-end Developer
2017 - 2018
Walmart Brazil
- Improved the user experience on the website for Black Friday in 2017.
- Implemented A/B tests to discover possible improvements to the website to increase conversion and revenue.
- Enhanced and maintained an application used in the whole country.
Technologies: JavaScript, Sass, React, jQuery, HTML, APIs, GitHub, HTML5, Unit Testing, Docker, Front-end Development, Front-end, CSS3, Responsive Web Design (RWD), SQL, CI/CD Pipelines, Web Development, API Integration, A/B Testing, UX Design, UI Development, Object-oriented Programming (OOP)
Front-end Developer
2016 - 2017
Freelance
- Developed an institutional website for Hippo Drs. as my first front-end project.
- Extracted a system from an Excel worksheet used to calculate the industry product's distribution.
- Enabled the previous spreadsheet system to scale and be updated by the salespeople much faster than before.
Technologies: Redux, React, Express.js, Firebase, Bootstrap, CSS, Sass, Node.js, JavaScript, Firebase Cloud Functions, Cloud Firestore, HTML, APIs, GitHub, HTML5, Unit Testing, Docker, Front-end Development, Front-end, CSS3, Responsive Web Design (RWD), SQL, ECMAScript (ES6), React Hooks, Tailwind UI, Tailwind CSS, Web Development, API Integration, Cloud, UI Development
Programmer
2013 - 2016
Consinco
- Developed a mobile app to discover the checkout patterns in retail. The goal was to increase the effectiveness of promotions.
- Integrated the ERP to the VTEX store, enabling the supermarket's online delivery.
- Delivered features related to sales and invoices in the ERP.
Technologies: JavaScript, Oracle PL/SQL, SQL, Oracle, HTML5, Back-end, Object-oriented Programming (OOP)
Programmer
2011 - 2013
Usina São Domingos S/A
- Improved the truck maintenance reports by extracting data from 3rd-party software.
- Redesigned the industrial control software, allowing for better production control.
- Implemented many features to the departments of a sugar company like chemical analysis, equipment maintenance, product expedition, telecom services, human resources, and agricultural control.
Technologies: Oracle PL/SQL, SQL, Back-end, Object-oriented Programming (OOP)
Experience
New Signup for Loggi
https://www.loggi.com/contas/criar/Developed Loggi's new signup with a new layout, lead gathering, and new experience based on UX user studies, and rewrote the front-end application using React, Redux, and related technologies. Besides the signup feature, the modern signup experience solved the problem of capturing partial signup data from the clients to the sales team.
Loggi's New Website
https://www.loggi.com/Developed Loggi's new website using Pug template engine, CSS, JavaScript, and internationalization support. This project also removed the former website from Django templates and enabled the independent website's deployment.
Certifications
JUNE 2022 - JUNE 2025
Certified Kubernetes Administrator
Linux Foundation
Skills
Libraries/APIs
React, REST APIs, Node.js, jQuery
Tools
Figma, Git, GitHub, Webpack, Vault
Languages
JavaScript, CSS, Python, TypeScript, ECMAScript (ES6), HTML, SQL, Sass, GraphQL, SCSS, HTML5, CSS3, Go, Dart
Frameworks
Redux, Tailwind CSS, Next.js, Material UI, React Native, Flutter, Jest, Cypress, Django, Express.js, NestJS, Bootstrap, Yarn
Paradigms
REST, Object-oriented Programming (OOP), Unit Testing, Responsive Web Design (RWD), Scalable Application, Microservices, Functional Programming, UX Design
Platforms
Visual Studio Code (VS Code), Oracle, Firebase, Kubernetes, Docker, Amazon Web Services (AWS), Linux, Windows
Storage
MySQL, Oracle PL/SQL, PostgreSQL, Cloud Firestore, Amazon S3 (AWS S3)
Other
Front-end Development, Front-end, Back-end, React Hooks, Web Development, API Integration, Architecture, Axios, APIs, Storybook, Full-stack, CI/CD Pipelines, Tailwind UI, Scalable Architecture, Cloud, UI Development, Firebase Cloud Functions, Chrome Extensions, A/B Testing, PDF
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