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Davi GuelfiDG
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Davi Guelfi

@daviguelfi

I build scalable React and Next.js interfaces, design systems, and platform integrations.

Zimbabwe
Message

What I'm looking for

I'm looking for frontend challenges involving architecture, development best practices, high-quality interfaces, and scalable product development, where I can build maintainable digital products with strong user experiences.

I've built web interfaces, reusable components, and Design System standards at Water Services and Technologies using React.js and Next.js, integrating frontend applications with backend APIs and services.

Previously at Bravium, I built a Flutter Design System and helped modernize Bootstrap and .NET applications into a Next.js-based web architecture. I also created reusable Material Design patterns and a project starter foundation that reduced setup effort for development teams.

At Dasa, I developed a surgical workflow dashboard that supported scheduling, physician notifications, and visibility into signed terms and process stages. At Luizalabs, I built mini apps, a JavaScript SDK for native integrations, React portals, and seller-facing receivables interfaces.

I'm interested in frontend architecture, development best practices, high-quality interfaces, and scalable product development, with a focus on performance, accessibility, maintainability, and user experience.

Experience

Work history, roles, and key accomplishments

Water Services and Technologies logoWT
Current

Frontend developer

Aug 2025 - Present (1 year)

Developed web interfaces using React.js and Next.js, integrated with backend APIs and services.
Created, maintained, and evolved reusable components and visual standards for the platform’s Design System.
Implemented unit tests and participated in code reviews, contributing to frontend quality, consistency, and maintainability.
Worked closely with technical leadership, product, and engineering team

Opensanca logoOP

Organizer

Feb 2019 - Nov 2025 (6 years 9 months)

Volunteered as an organizer of Opensanca meetups and events focused on the technology community.
Facilitated events, talks, and connections among professionals, students, and local companies.
Supported event operations, participant communication, and speaker and guest coordination.
Helped strengthen access to knowledge sharing, networking, and career opportunities within the local tech community.

Bravium logoBR

Senior Frontend Developer

Nov 2023 - Mar 2025 (1 year 4 months)

Built a Flutter Design System to improve reuse, visual consistency, and development speed across websites and mobile applications.
Contributed to the modernization of the web ecosystem, supporting the migration from Bootstrap and .NET applications to a modern Next.js-based architecture.
Structured reusable components and interface patterns based on Material Design principles.
Helped create a proje

Monitora Soluções Tecnológicas logoMT

Full-stack Developer

May 2023 - Nov 2023 (6 months)

Worked on solutions focused on mobile application automation and data collection for financial analysis.
Developed workflows using Python and Appium to integrate applications with Android emulators hosted in AWS environments.
Built data extraction and processing flows to support credit, financing, and financial opportunity analysis.
Contributed to technical solutions that transformed collected dat

Dasa logoDA

Frontend Developer

Jun 2022 - Apr 2023 (10 months)

Worked on the development of a dashboard for the surgical rotation workflow, supporting surgery scheduling and notifications for responsible physicians.
Developed interfaces using React.js, Next.js, TypeScript, and Design System-based components.
Helped provide visibility into signed terms and process stages, supporting the prevention of operational delays.
Contributed to the frontend team’s techn

Luizalabs logoLU

Frontend Developer

Jan 2021 - Jun 2022 (1 year 5 months)

Developed mini apps to enable communication between web applications and native iOS and Android features.
Created and enhanced a JavaScript SDK to standardize integrations between mini apps and native applications.
Worked on project organization, screen development, and distributed version control using Git.
Built a React.js portal to simplify user access to and adoption of the available solutions

Luizalabs logoLU

Mobile Developer

Aug 2020 - Jan 2021 (5 months)

Worked on analyzing and structuring integrations between native applications to support the creation of a mini app ecosystem.
Developed features using Flutter, contributing to cross-platform application experiences.
Supported the definition of integration and communication flows between applications, considering technical requirements and user experience.
Collaborated with the team on reusable sol

Headliners-IC logoHE

Frontend Developer Intern

Jan 2019 - Jun 2019 (5 months)

Contributed to the development of Mahamudra, a platform focused on physical and mental health.
Built landing pages and web interfaces using React.js.
Collaborated on the development and evolution of the mobile application using React Native.
Participated in code reviews, contributing to code quality, organization, and maintainability.
Worked closely with the team to deliver new features and platfo

Digital Innovation One logoDO

Full-Stack Developer Trainee Português

Aug 2018 - Dec 2018 (4 months)

Contributed to the development of an educational platform using React.js, React Native, and Python.
Helped design and build the application’s database structure.
Developed and integrated APIs to enable communication between the frontend, mobile application, and backend.
Built mobile screens and user flows using React Native.
Worked in a hands-on learning environment, collaborating on the delivery

Education

Degrees, certifications, and relevant coursework

FL

Faculdades Integradas de Araraquara (Faculdades Logatti)

Bachelor of Science, Information Systems

2019 - 2021

Pursued a degree in Information Systems, focusing on software development and technology management.

FL

Faculdades Integradas de Arararaquara (Faculdades Logatti)

Information System

2019 - 2021

FT

Fatec Taquaritinga

Technologist, Systems for Internet

2018 - 2019

ET

ETEC

Technical Degree, Informatics

2017 - 2018

Completed a technical program in Informatics, building foundational skills in computer science.

ET

ETEC

Tecnico, Tecnico em Informatica

2017 - 2018

Tech stack

Software and tools used professionally

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