Tanner Barcelos

I am a passionate Full Stack Engineer with a strong focus on web development and product design.

A Little About me

Profile Image

As a Senior Full Stack Software Engineer at Visa, I specialize in developing cutting-edge UI platforms for operations and BI. My expertise includes creating web interfaces with technologies such as React, Redux, ChartJS, MaterialUI, and more.

At Visa, I significantly contributed to the design and development of a chatbot for conversational business intelligence, enhancing decision-making for business leaders with real-time performance insights. I also developed a control plane API and UI components for AI Platform operations to manage and monitor machine learning models, improving operational efficiency and reducing costs.

Before Visa, at Scalable Commerce, I led a team in CRM platform development and migrated web applications to containerized AWS workloads, significantly improving customer service efficiency and retention rates.

My technical proficiency spans frontend technologies like HTML, CSS, React, NextJS, and backend systems using NodeJS, Express, and various databases. Additionally, I have strong DevOps skills, utilizing tools like Docker, Kubernetes, and AWS.


What I've Built

BI Secretary

This is a project built while working at Visa

TypescriptReactZustandNovaCSS (Visa CSS Library)Apache SupersetDockerOpenAI API (GPT-4)


Under Construction

Coffee Connection

ReactRedux ToolkitExpressMongoDBSCSS




ReactRedux ToolkitTypeScriptExpressMongoDBVercelLinode

Covid Insider



Greg Bernstein
Professor at CSU East Bay

Tanner was one of the top students in my CS351 Web Development class at California State University East Bay. This class was on full stack web development which includes development for the front end, backend, and the network (protocols and architectures). Tanner excelled at Website design, React, and Node.js development. As an undergraduate he then took my graduate level CS651 Web Systems class where he was my top student. This class featured enhanced web security, server testing (via JavaScript testing frameworks), enhanced JSON processing including JSON-Schema based validation and WebSockets.Tanner went significantly beyond class requirements with his own development project (web app) which featured independent deployment, API usage, enhanced CSS techniques, etc. In addition, Tanner has very good communication skills. I highly recommend Tanner for any type of web related development job

Karan Monga
Software Engineer at Apexx Strategies

I had the pleasure of working with Tanner on the Frontend team for the class project during our Software Engineering course. Tanner always displayed enthusiasm to learn new things and motivated the team to do a better job. His experience in JavaScript programming proved valuable during the development phase. Above all, I was really impressed with Tanner's quick learning ability and his dedication to the task at hand. I highly recommend him for any Frontend developer position

Joshua Knudsen
Fomer Student at CSU East Bay

Tanner is a very hardworking student who is very passionate on learning the material and takes joy in helping others around him understand the material. He puts a lot of time into understanding and practicing material learned in class. His knowledge of Python reflects the effort that he puts in