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

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.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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.

Education

Bachelor of Science at University of Wisconsin Madison
January 1, 2022 - December 31, 2025

Qualifications

AWS Certified Cloud Practitioner
April 1, 2025 - April 1, 2028

Industry Experience

Software & Internet, Financial Services, Education, Media & Entertainment