Open to opportunities

João Proença

@jooproena

Message

Software developer skilled in React, Ruby on Rails, and scalable web apps.

Portugal

Message

What I'm looking for

I seek a collaborative team building scalable web applications where I can take ownership of features, improve performance, and grow into senior engineering responsibilities.

I am a software developer with hands-on experience building and maintaining large-scale web applications using React, Ruby on Rails, PostgreSQL and related technologies. I have improved application performance (40% speedup at Landing.jobs), fixed bugs, authored automated tests, and collaborated with cross-functional teams to deliver reliable features for fintech and telecom products.

With a degree in Computer Engineering and certifications including Cisco CCNA IoT and GraphQL with React, I bring practical backend and frontend expertise, a focus on scalability and performance, and strong communication skills in Portuguese and English.

Experience

Work history, roles, and key accomplishments

Current

Software Developer

Current

iCapital

Apr 2024 - Present (1 year 11 months)

Develop and maintain an alternative investments web application using React, Ruby on Rails, and PostgreSQL; write automated tests and collaborate with cross-functional teams to design and deliver production-ready features.

React Ruby on Rails PostgreSQL Automated Testing JavaScript TypeScript Cross Functional Collaboration

Software Developer

Landing.jobs

Jan 2023 - Sep 2023 (8 months)

Developed and maintained web applications using Ruby on Rails, React and GraphQL; implemented server-side logic and front-end components, improving performance by 40% through optimizations.

Ruby on Rails React GraphQL PostgreSQL Performance Optimization TypeScript JavaScript MySQL

Junior Software Developer

Altice Portugal

Jan 2021 - Jan 2023 (1 year 11 months)

Developed new features and maintained a large-scale telecom web application using React, Ruby on Rails, MySQL and Elasticsearch; worked with RabbitMQ and Docker to support scalable integrations.

React Ruby on Rails MySQL Elasticsearch RabbitMQ Docker JavaScript Web Application Development

Education

Degrees, certifications, and relevant coursework

Polytechnic Institute of Leiria

Degree in Computer Engineering, Information and Communication Technologies

2016 - 2020

Activities and societies: Courses included networks, software development, and IoT; obtained related certificates such as Introduction to IoT (Cisco CCNA) and GraphQL with React (Udemy).

Degree in Computer Engineering with focus on Information and Communication Technologies completed from September 2016 to August 2020.