Fernando Nascimento Oliveira
@cifernando
I build scalable React and Node solutions that improve checkout conversion.
BrazilWhat I'm looking for
At Mercado Livre, I build and maintain fiscal-information web and mobile interfaces used by 300,000 people daily across eight Latin American markets. I led the move from native mobile screens to React webviews and built metrics that raised Brazil's conversion rate by 1.2%, adding US$700k in monthly GMV.
I also built a payment-link history platform using AI-assisted workflows, compressing a four-month roadmap into 1.5 months. Previously at Letrus, I launched an internal product, evolved a design system, and improved frontend standards and legacy codebases.
Experience
Work history, roles, and key accomplishments
• Single-handedly built a payment link history platform using AI-assisted engineering workflows (Spec-Driven Development and Harness Engineer), pioneering a custom planning methodology that I subsequently shared with the team to scale AI-driven productivity — compressing a 4-month roadmap into 1.5 months, using Claude Code and Cursor.
• Developing and maintaining scalable web and mobile (iOS and A
Senior Software Engineer
Mercado Livre
Jul 2022 - Present (4 years 2 months)
Developed scalable web and mobile interfaces for fiscal information across multiple Latin American markets, impacting over 300,000 daily users. Implemented a metrics system that increased conversion rates by 1.2% and generated an additional US$700k in monthly GMV.
• Defining, implementing, and documenting new coding standards, architectural patterns, and best practices collaboratively with my peers, leveraging tools such as ESLint, Webpack, and CI/CD pipelines.
• Continuously refactoring legacy codebases to enhance maintainability, scalability, and performance, ensuring alignment with modern JavaScript (ES6+) and React best practices.
• Organizing, maintain
Education
Degrees, certifications, and relevant coursework
Instituto Federal da Bahia
Bachelor's, Electrical and Electronic Engineering
2019 - 2024
Bachelor's degree in Electrical and Electronic Engineering from the Instituto Federal da Bahia, completed in 2024.
IFBA - Instituto Federal da Bahia
Bachelor's, Electrical and Electronic Engineering
2019 - 2024
Trybe
Web Development, Web Development
2021 - 2022
Trybe is a web development school that has a genuine commitment
to the professional success of its students. With the Shared Success
Model, those who study at Trybe have the option of paying only when
they are already working.
There are more than 1500 hours of training that covers fundamentals of
web development, development, Front-end, Back-end, computer science,
software engineering, agile metho
Availability
Location
BrazilAuthorized to work in
Portfolio
fernando-portfolio.vercel.appSalary expectations
Job categories
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