Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I am a passionate full-stack software engineer with a track record of delivering scalable, high-performance enterprise web applications. I enjoy turning complex requirements into clean, maintainable code and robust architectures that scale in the cloud. I thrive in agile teams, value collaboration and mentorship, and am continually expanding my skills across React, Java/Spring, cloud platforms, and DevOps to drive reliable, secure software deployments.…I am a passionate full-stack software engineer with a track record of delivering scalable, high-performance enterprise web applications. I enjoy turning complex requirements into clean, maintainable code and robust architectures that scale in the cloud. I thrive in agile teams, value collaboration and mentorship, and am continually expanding my skills across React, Java/Spring, cloud platforms, and DevOps to drive reliable, secure software deployments.

Juan Carlos Trejo

Full Stack Developer, Web Developer, DevOps Developer, +1





I am a passionate full-stack software engineer with a track record of delivering scalable, high-performance enterprise web applications. I enjoy turning complex requirements into clean, maintainable code and robust architectures that scale in the cloud. I thrive in agile teams, value collaboration and mentorship, and am continually expanding my skills across React, Java/Spring, cloud platforms, and DevOps to drive reliable, secure software deployments.…I am a passionate full-stack software engineer with a track record of delivering scalable, high-performance enterprise web applications. I enjoy turning complex requirements into clean, maintainable code and robust architectures that scale in the cloud. I thrive in agile teams, value collaboration and mentorship, and am continually expanding my skills across React, Java/Spring, cloud platforms, and DevOps to drive reliable, secure software deployments.

Available to hire

I am a passionate full-stack software engineer with a track record of delivering scalable, high-performance enterprise web applications. I enjoy turning complex requirements into clean, maintainable code and robust architectures that scale in the cloud.

I thrive in agile teams, value collaboration and mentorship, and am continually expanding my skills across React, Java/Spring, cloud platforms, and DevOps to drive reliable, secure software deployments.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Work Experience

Software Engineer II at Service Core

July 1, 2024 - February 28, 2025

Implemented new features for a React/Node.js web application; rewrote the client billing system; upgraded React components from class to functional, introduced Redux-Saga for data fetch/sync/pagination from Firebase; migrated heavy frontend logic to Google Cloud Functions with Node.js to improve create/update/delete flows; assisted cloud deployment via Jira pipelines and Google Cloud Platform infrastructure.

Full Stack Software Engineer at Reach Healthcare

March 1, 2024 - July 31, 2024

Built a mobile-friendly, cloud-native web app using Java, Spring Boot, Angular, AWS, Docker, and Keycloak; delivered a freelance solution to manage shifts for facilities (RN, LPN, CAN); implemented clock-in/clock-out with device GPS; geolocation checks; weekly timesheets generated by cron and emailed as Excel reports.

Full Stack Software Engineer at KaiNexus

March 1, 2022 - February 29, 2024

Developed SaaS features in Java/Spring Boot backend and ExtJS frontend; built a resizable fishbone diagram with drag-and-drop using SVG; created dynamic dashboard widgets with user-defined filters to track events and dates.

Full Stack Engineer at Cognizant Technology Solutions

December 1, 2019 - February 28, 2022

Practiced Test-Driven Development with Java (Mockito, JUnit) and Angular (Jasmine/Karma); implemented SonarQube for code quality and coverage; automated cloud-native deployments with Jenkins, Maven, Gradle, Azure DevOps and AWS; designed Elasticsearch indices and analyzers to optimize search performance; built RESTful web apps using Java, Spring Boot, and Angular (v6-8).

Full Stack Engineer at Revature

August 1, 2018 - December 31, 2019

Built SPAs using Angular, Java, and Spring Boot; utilized ActiveMQ for event-driven notifications; modernized monolithic applications by migrating to a microservices architecture for improved performance and resilience.