Open to opportunities

João Leonello

@jooleonello

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Full stack developer with over 5 years of experience.

Brazil

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What I'm looking for

I'm looking for a role that fosters innovation and collaboration, with opportunities for growth.

I'm João Leonello, a passionate Full Stack Developer with over five years of experience specializing in distributed systems and scalable products. My journey has led me to design and implement high-performance systems using Java and Go, where I have explored Golang through personal projects, including a custom URL video encoder that optimizes parallel processing with Goroutines. I thrive in collaborative environments and am highly motivated to deepen my skills in Go while contributing innovative solutions.

In my current role at Foursys, I developed a client-facing mobile banking module for the Bradesco app using Angular within a micro front-end architecture. This project enhanced user experience and increased customer engagement significantly. I also designed a Backend-for-Frontend (BFF) service and multiple REST APIs using Node.js/Typescript, ensuring scalability and improved system integration. My hands-on experience with CI/CD pipelines and DevOps practices has allowed me to streamline release cycles, while mentoring junior developers has been a rewarding aspect of my career.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Developer

Current

Foursys

Feb 2022 - Present (3 years 4 months)

Developed a client-facing mobile banking module for the Bradesco app using Angular within a micro front-end architecture. Designed and implemented a Backend-for-Frontend service and multiple REST APIs using Node.js/Typescript, ensuring scalability and improved system integration.

Angular Node TypeScript REST APIs Bamboo GitHub Actions Microservices Mentoring

Full Stack Developer

Maptriz

Sep 2021 - Feb 2022 (5 months)

Transitioned from Node.js to Java Spring, integrating message queues (RabbitMQ) to handle high data throughput. Enhanced backend architectures to support municipal real estate management systems.

Java RabbitMQ Backend Development Message Queues System Integration

Full Stack Developer Jr.

WDNA

Oct 2020 - Sep 2021 (11 months)

Developed and deployed an e-commerce platform utilizing AWS S3 for storage and Redis for advanced caching strategies. Collaborated on API integrations with payment systems, improving customer checkout experience.

AWS S3 Redis API Integration Caching

Full Stack Developer Jr.

Menon

Jan 2020 - Oct 2020 (9 months)

Contributed to the end-to-end development of a foodtech app, including API design and front-end features. Delivered scalable solutions in a fast-paced startup environment.

API Design Scalability