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Hi, I'm Rex Hart, a software engineer with a passion for cloud computing and scalable architecture. I have hands-on experience developing AWS-based solutions, including serverless applications and event-driven systems. I love diving into both frontend and backend projects, leveraging React.js and AWS services to build impactful products. I also graduated from UW-Madison in Computer Science, T15 program in the US. I've worked in agile teams that focus on user experience and optimized system performance, and I enjoy collaborating with peers to deliver robust software. Outside of work, I'm into NBA, photography, anime, skateboarding, surfing, and video games, which keep my creative energy flowing.…Hi, I'm Rex Hart, a software engineer with a passion for cloud computing and scalable architecture. I have hands-on experience developing AWS-based solutions, including serverless applications and event-driven systems. I love diving into both frontend and backend projects, leveraging React.js and AWS services to build impactful products. I also graduated from UW-Madison in Computer Science, T15 program in the US. I've worked in agile teams that focus on user experience and optimized system performance, and I enjoy collaborating with peers to deliver robust software. Outside of work, I'm into NBA, photography, anime, skateboarding, surfing, and video games, which keep my creative energy flowing.

Rex Hart

Developer, Cloud Developer, Full Stack Developer, +2

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Hi, I'm Rex Hart, a software engineer with a passion for cloud computing and scalable architecture. I have hands-on experience developing AWS-based solutions, including serverless applications and event-driven systems. I love diving into both frontend and backend projects, leveraging React.js and AWS services to build impactful products. I also graduated from UW-Madison in Computer Science, T15 program in the US. I've worked in agile teams that focus on user experience and optimized system performance, and I enjoy collaborating with peers to deliver robust software. Outside of work, I'm into NBA, photography, anime, skateboarding, surfing, and video games, which keep my creative energy flowing.…Hi, I'm Rex Hart, a software engineer with a passion for cloud computing and scalable architecture. I have hands-on experience developing AWS-based solutions, including serverless applications and event-driven systems. I love diving into both frontend and backend projects, leveraging React.js and AWS services to build impactful products. I also graduated from UW-Madison in Computer Science, T15 program in the US. I've worked in agile teams that focus on user experience and optimized system performance, and I enjoy collaborating with peers to deliver robust software. Outside of work, I'm into NBA, photography, anime, skateboarding, surfing, and video games, which keep my creative energy flowing.

Available to hire

Hi, I’m Rex Hart, a software engineer with a passion for cloud computing and scalable architecture. I have hands-on experience developing AWS-based solutions, including serverless applications and event-driven systems. I love diving into both frontend and backend projects, leveraging React.js and AWS services to build impactful products. I also graduated from UW-Madison in Computer Science, T15 program in the US.

I’ve worked in agile teams that focus on user experience and optimized system performance, and I enjoy collaborating with peers to deliver robust software. Outside of work, I’m into NBA, photography, anime, skateboarding, surfing, and video games, which keep my creative energy flowing.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

Javanese

Advanced

Amharic

Intermediate

Work Experience

Software Engineer at CrackaJack Digital Solutions

December 1, 2024 - Present

Debugged an automated email system through Cloudfront, ensuring reliable order tracking for customers by inspecting AWS analytics and Lambda functions. Overhauled UI with responsive web design using SCSS and React for dynamic UI implementations. Worked in a small agile team to enhance an AWS Lambda-based web framework and deployed a scalable serverless product. Managed code repositories using GitHub and gained hands-on familiarity with AWS services and frontend development.

Software Engineering Capstone Project at Capital One

May 31, 2025 - July 30, 2025

Designed and implemented an event-based fraud detection algorithm using AWS SNS, SQS, Lambda, and DynamoDB to flag suspicious transactions in real-time. Built a scalable serverless AWS architecture for transaction processing and fraud alerts. Integrated AWS SNS for SMS notifications to users to confirm or deny transactions and updated transaction statuses accordingly. Participated in Agile development cycles and sprint planning, conducted peer reviews, and used GitHub for version control to ensure robust solutions.

Software Engineering Fellow at Headstarter AI

August 31, 2024 - July 30, 2025

Developed an AI-integrated customer service chatbot using React, OpenAI APIs, and Firebase to improve user response efficiency. Performed A/B testing to optimize chatbot prompts and page layout, increasing user retention by 20%. Created an AI-integrated Vercel flashcard generator app linked with Firebase for dynamic flashcard creation.