Hajin Jang

Hajin Jang Email and Phone Number

CS & Applied Math @ Johns Hopkins University @ Dangy
Hajin Jang's Location
Baltimore, Maryland, United States, United States
About Hajin Jang

👋 About Me: Hello, there! I’m Hajin Jang, a driven software engineer with a deep interest in data, artificial intelligence, and machine learning. I'm passionate about leveraging technology to tackle complex problems and make impactful contributions to the future of digital innovation.🍎 Education: I’m currently pursuing a B.S. in Computer Science and Applied Mathematics at Johns Hopkins University. Throughout my studies, I have maintained a strong academic record with consistent placement on the Dean's List. My coursework has equipped me with a solid foundation in data structures, algorithms, AI, and mathematical principles that are integral to modern data science and machine learning applications.🧪 Interests: While software engineering is at the core of my career path, I am equally fascinated by the transformative potential of AI and machine learning. These fields not only inspire me but drive me to explore the boundaries of what data and algorithms can accomplish in sectors like healthcare, automation, and predictive modeling. Working on projects like medical imaging analysis and online fraud detection, I’ve been able to bring my ideas to life, constantly striving to refine and push the limits of my technical skills.💻 Skills: Through a combination of academic projects and professional experiences, I have honed my skills in a range of programming languages, including Python, Java, C, and C++. I have also developed expertise in backend development, cloud services, and data processing, frequently working with tools such as AWS, SQL, and MySQL. My recent roles have expanded my toolkit further, exposing me to agile development environments and hands-on AI implementation.🏅 Accomplishments: Some highlights of my journey so far include:- Developing impactful solutions: At Dangy, I am currently developing of a push notification service for mobile applications, from system architecture to E2E testing.- Contributing to global health initiatives: At Delineo Disease Modeling, I helped design a population simulation algorithm, leading to a WHO contract for a worldwide disease simulator.- Pioneering backend solutions: At Letitu Corp., I built a performance monitoring system that automates reporting, significantly boosting decision-making efficiency.🗄️ Previous and Current Roles:- Software Engineer Intern at Dangy- Algorithm Engineer at Delineo Disease Modeling- QA Engineer Intern at BMW Group- Backend Developer Intern at Letitu Corp.- Data Science Intern at Perfitt

Hajin Jang's Current Company Details
Dangy

Dangy

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CS & Applied Math @ Johns Hopkins University
Hajin Jang Work Experience Details
  • Dangy
    Software Engineer Intern
    Dangy Oct 2024 - Present
    San Antonio, Texas, United States
    • Leading the design and development of a push notification service for a mobile application, managing all stages of the project lifecycle from system architecture through to end-to-end (E2E) testing to ensure reliable, real-time user engagement.• Acquiring practical skills in Kotlin to develop API endpoints to manage user registration and notification distribution, AWS Lambda for scalable, serverless backend operations, and Amazon SNS to efficiently route notifications.
  • Jhu Delineo Disease Modeling
    Algorithm Engineer
    Jhu Delineo Disease Modeling Sep 2024 - Present
    Baltimore, Maryland, United States
    • Collaborating on the Delineo Disease Modeling Project, which develops a highly scalable, parallelized system to simulate and assess the impact of non-pharmaceutical interventions and various events on disease transmission across diverse computing platforms.• Contracted by the World Health Organization (WHO) and partnered with Ruvos, a public health software development company.
  • Johns Hopkins University Center For Leadership Education
    Student Coordinator
    Johns Hopkins University Center For Leadership Education Sep 2022 - Present
    Baltimore, Maryland, United States
    • Designed a user-friendly website to facilitate quick and convenient access to information for competition participants• Collaborated with a team of interns to successfully organize and host 3 pitch deck workshops for competition participants• Orchestrated events flawlessly by managing logistics and supporting startups, elevating their ability to showcase their ideas
  • Bmw Group
    Qa Engineer Intern
    Bmw Group Jan 2024 - Jun 2024
    • Reported 78 new defects in 24 versions of BMW’s navigation software via weekly bench flashing and running 50+ manual tests.• Managed 200+ tickets by conducting weekly tests and communicating progress to 3 PMs and 4 SWEs in regular sync meetings.• Authored 12 testing and troubleshooting manuals detailing 50+ test cases and software and hardware maintenance procedures.
  • Letitu Corp.
    Backend Developer Intern
    Letitu Corp. Nov 2023 - Dec 2023
    • Developed a business performance monitoring system with Spring Boot that delivers automated KPI and business insight reports through a custom HTML/CSS email template, manages recipient data in a MySQL table, and deploys notifications via AWS SES—saving 2+ hours of manual querying and reporting daily and enhancing the efficiency of executive decision-making.• Automated data collection by integrating 20+ JPA native queries to aggregate data from 10+ MySQL tables and populating 3 user metrics summary tables in the database, reducing human error by 99% and enabling long-term performance analysis.• Accelerated revenue-generating algorithms (college recommendation, career survey, application roadmap) by reducing average latency by 95% through query optimization and implementing Redis caching for static data with AWS ElastiCache.• Utilized Agile methodologies to achieve 100% on-time delivery across 8 sprints, actively participating in weekly scrum meetings, sprint planning sessions, and code reviews via Asana to ensure high-quality, on-schedule deliverables.
  • Johns Hopkins University Center For Language And Speech Processing
    Data Specialist
    Johns Hopkins University Center For Language And Speech Processing Feb 2023 - May 2023
    Baltimore, Maryland, United States
    • Utilized data annotation techniques, including object detection and segmentation, to execute independent annotation projects• Annotated and preprocessed multimedia (text, videos, audio) data to extract essential information from current events
  • Perfitt
    Data Science Intern
    Perfitt Jul 2022 - Aug 2022
    Seoul, South Korea
    • Preprocessed and labeled over 210k raw images through data cleaning and classifying to prepare quality data for model training• Conducted an EDA on a dataset with 13 attributes, leveraging statistical techniques to identify meaningful patterns in user data• Modeled and visualized the results of EDA by utilizing essential Python libraries (matplotlib, seaborn, plotly)

Hajin Jang Education Details

Frequently Asked Questions about Hajin Jang

What company does Hajin Jang work for?

Hajin Jang works for Dangy

What is Hajin Jang's role at the current company?

Hajin Jang's current role is CS & Applied Math @ Johns Hopkins University.

What schools did Hajin Jang attend?

Hajin Jang attended The Johns Hopkins University, Chadwick International.

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