Looking for a job

Yeison Fernando Sisa Niño

@yeisonfernandosisani

Message

I build scalable full-stack web applications with React, Node.js, Python, Java, and PostgreSQL.

Colombia

Message

What I'm looking for

I'm open to remote opportunities where I can build scalable, user-centered web applications, improve code quality, and continue growing across frontend and backend development.

I've built and delivered web products at Blazar Solutions using React.js, Node.js, HTML, CSS, and JavaScript, including reusable components, validations, REST API integrations, and SEO improvements.

As a Systems Engineer, I work across modern interfaces, backend services, authentication, and databases. My projects include CRUD and PERN applications with JWT authentication, REST APIs, Python, Node.js, React.js, and PostgreSQL.

Experience

Work history, roles, and key accomplishments

Junior Developer Engineer

Blazar Solutions S.A.S.

Jul 2023 - Mar 2025 (1 year 8 months)

Designed and built React.js interfaces integrating REST APIs to improve user experience and performance. Developed and deployed backend services with Node.js and Express.js to extend key web app features.

React REST APIs NodeJS ExpressJS JavaScript HTML CSS Git GitHub

Beginner Programmer

Heinsohn Human Global Solutions S.A.S.

May 2022 - Jul 2022 (2 months)

Designed, developed and implemented Java-based features, ensuring efficient and maintainable solutions.

Java

Beginner Programmer

Blazar Solutions S.A.S.

Nov 2021 - May 2022 (6 months)

Built and delivered company products using React.js, Node.js, HTML, CSS, and JavaScript technologies. Applied advanced SEO techniques to optimize the website and significantly improve its search rankings.

React NodeJS HTML CSS JavaScript SEO