Jang Ho Hwang

• Architected and launched a personal diary application with AI-powered features on Apple App Store • Developed robust REST APIs using Django-Ninja with PostgreSQL, implementing best practices for scalability • Integrated LLM capabilities via LiteLLM to generate intelligent, contextual comments on user entries • Leveraged state-of-the-art LLMs to accelerate development, achieving 1,600+ commits in 4 months • Implemented performance-critical components in Rust to improve response times on resizing photos.

• Architected and implemented RESTful APIs and infrastructure for Japanese e-commerce platform nugu.jp • Developed and maintained e-commerce webapp using Next.js, TypeScript, and Bootstrap • Developed comprehensive back-office tools using Django and Svelte, improving operational efficiency • Enhanced the delivery tracking system by introducing parallel processing, drastically reducing response time • Mentored development team on Django best practices, resulting in improved code quality and feature delivery

• Led technical architecture and implementation of company-wide REST APIs using Django, React, and PostgreSQL • Achieved 75% reduction in AWS infrastructure costs through strategic optimization and resource management • Collaborated with CEO to define and execute technical strategy, ensuring scalability for user growth • Provided technical leadership and mentorship to cross-functional development teams • Built and managed fully remote engineering team across multiple time zones

• Spearheaded the development and launch of a K-POP fandom mobile application using Flutter, reaching 10K+ users • Architected scalable REST APIs using Django and PostgreSQL to handle high-traffic fan events • Developed proprietary CMS in collaboration with operations team, reducing content publishing time • Engineered real-time video broadcasting service using WebRTC, RTMP, and FFmpeg with CUDA optimization

• Architected AI-powered chatbot engine for Kakao’s smart speaker using Java Spring and MongoDB • Developed comprehensive chatbot management console using Angular, serving 50+ internal staffs • Collaborated with AI research teams to integrate advanced NLP capabilities into production systems • Successfully ported high-traffic messenger (KakaoTalk) server from Linux to macOS, enabling faster local development

• Co-founded company and led all technical aspects from architecture to implementation • Developed native iOS application using Swift with focus on performance and user experience • Built RESTful API backend using Flask and SQLAlchemy with comprehensive test coverage • Deployed and managed AWS infrastructure (EC2, S3, CloudFront, RDS) achieving 99.9% uptime • Mentored two junior developers, improving their technical skills and career progression

• Designed and implemented comprehensive UI test automation platform for “Need for Speed Edge” • Utilized Angular, Node.js, TypeScript, and Docker to create scalable testing infrastructure • Reduced QA testing time by 70% through automated test suite implementation

• Developed social music player Android application using Java and Android SDK • Maintained and optimized high-traffic Python API server handling 1M+ daily requests • Improved API response times by around 50% through database optimization and caching strategies

• Successfully ported Android application to tablet interface for expanding user base • Analyzed and optimized AWS infrastructure, reducing monthly costs by $200,000 • Enhanced Django application performance for high-traffic scenarios (10M+ daily requests) • Designed and implemented database sharding middleware using Java for horizontal scaling • Delivered all projects successfully while working fully remote across time zones