Sergio聽Barrera
UI Software Engineer at Systalex Corp
Concord, California, United States
Summary
馃懁
Senior馃帗
Top SchoolSergio Barrera is a Full Stack Software Engineer with 14 years of experience building mission-driven web and mobile applications across government, education, non-profits, and enterprise sectors. He ships end-to-end solutions using React/Next.js on the front end and Spring Boot/Java on the backend, with hands-on CI/CD, AWS, Docker and Jenkins automation for production deployments. Recently focused on R&D in Generative AI, Sergio prototypes Retrieval-Augmented Generation workflows and LangChain integrations, exploring secure Bedrock-driven agents to benefit education and non-profit use cases. He has led MVPs supporting thousands of users, practiced Scrum delivery with 3-week sprints, and strengthened product confidence through testing and observability. A former bootcamp TA and curriculum contributor, he pairs practical teaching experience with technical depth鈥攐ften turning quick POCs into production-ready features. Based in Concord, CA, Sergio balances a pragmatic engineering style with curiosity for fast experimentation and community-focused impact.
14 years of coding experience
19 years of employment as a software developer
Full Stack Web Development Certification, Computer Software Engineering, Full Stack Web Development Certification, Computer Software Engineering at Free Code CampFull Stack Web Developer Nanodregree, , Server side, data driven web apps, Python back end, supports any front end, Full Stack Web Developer Nanodregree, , Server side, data driven web apps, Python back end, supports any front end at UdacityIngeniero en Electronica, Electronica, Ingeniero en Electronica, Electronica at Universidad Technologica NationalHigh School, Mathematics and Language, High School, Mathematics and Language at San Jose K12EducativeAdvanced American English, English conversational and Grammar, Advanced American English, English conversational and Grammar at San Jos茅 State UniversityUnix Administrator - Web Developer, PHP Javascript Mysql CSS HTML Ruby on Rails SQL, Unix Administrator - Web Developer, PHP Javascript Mysql CSS HTML Ruby on Rails SQL at University of Illinois Urbana-ChampaignRadiocomunicacions, Telecommunications, Radiocomunicacions, Telecommunications at University of Buenos AiresBS in Electronics, Computer Science, BS in Electronics, Computer Science at Universidad Tecnol贸gica NacionalAWS, DevOps certification, AWS, DevOps certification at KodeKloud
Spanish, English
Github Skills (57)
git10
ios10
react-native10
github10
vercel10
static-site-generator10
nextjs10
browser10
react-framework10
server-rendering10
ssg10
android10
compiler10
react10
hybrid10
Programming languages (11)
Github contributions (5)
sdbeng/controlled-components-demo
Feb 2019 - Mar 2021
review session - zoom
Contributions:13 PRs, 53 pushes, 3 branches in 2 years 2 months
javascriptzoomreview
sdbeng/jobs-community
Aug 2024 - Dec 2025
jobs listing, secured social network
Contributions:65 PRs, 63 pushes, 33 branches in 1 year 4 months
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