j
juandavidsierra

Juan D

@juandavidsierra
Colombia
Spanish, English
About me
Systems Engineer from Colombia with 5+ years building backend software for banks and public institutions. I develop REST APIs and microservices with Java and Spring Boot, Angular front ends, and databases like MySQL, Oracle, SQL Server and MongoDB. I also deploy Java apps on AWS (EC2, S3, RDS, Lambda) and fix bugs in existing projects. I work in clear phases, share progress often and deliver documented code in your Git repository. Message me before ordering so we can confirm the scope.... Read more

Skills

j
juandavidsierra
Juan D
Offline • 

See my services

API & Integrations
I will build a java spring boot rest API or microservice backend
From$80 / projectMore details

Portfolio

Work experience

ICA

software developer

ICA

Feb 2026 - Present • 9 mos

Software developer in the IT Office of a national government agency, working on business-critical information systems. - Gather and analyze requirements with users and functional teams. - Develop new features and fix issues in production systems using PHP and the Yii Framework. - Deploy releases to development, testing and production environments. - Integrate components following the software architect's guidelines. - Maintain documented code in the institutional Git repository. - Provide production support, knowledge transfer and progress reports in follow-up meetings. Tech: PHP, Yii Framework, Git