About
Highly accomplished Fullstack Engineering Manager with over 15 years of experience building high-performance web and mobile applications, driving significant business outcomes through technical leadership. Proven expertise in performance optimization, architecture design, and establishing best practices like A/B testing and E2E test automation. Adept at leading cross-functional teams, mentoring engineers, and bridging technical excellence with measurable product impact to accelerate innovation and deliver robust solutions.
Work
Seoul, Seoul, Korea (Republic of)
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Summary
Orchestrated the development and optimization of the Offerwall ad unit, leading a frontend engineering team to deliver high-performance web and WebView-based solutions that significantly boosted ROAS metrics and company-wide analytics.
Highlights
Spearheaded a 4-member frontend team, fostering a culture of A/B testing and rapid prototyping that accelerated safe production deployments and enhanced collaboration with Product, Design, and Backend teams.
Led frontend development for Multi-Reward CPE, designing intuitive end-user reward UX and robust back-office tools, contributing to a 50-100% lift in ROAS metrics.
Engineered impression tracking using Intersection Observer and batched event delivery, which optimized network overhead and significantly improved company-wide analytics.
Achieved a ~90% reduction in API calls and 50% cut in first-screen render time (TTFP) through lazy loading, rendering strategy improvements, and request optimization, resulting in substantial backend cost savings.
Resolved domain-block-related API failures by implementing fallback routing strategies after identifying issues via Sentry and New Relic, recovering lost traffic and approximately $5K/day in revenue.
Pioneered the integration of Playwright E2E tests into CI, drastically increasing release confidence, reducing production incidents, and enabling more frequent, secure deployments.
Developed an internal Chrome extension to port the OW SDK to JavaScript, which streamlined UI development and debugging, subsequently forming the foundation for web expansion and automated E2E testing.
Architected and led the complete frontend development lifecycle for a new WebView-based mobile application using React Native, from ideation to successful launch on Google Play (US).
OneEducation
|Software Engineer
Sydney, New South Wales, Australia
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Summary
Developed a comprehensive classroom management web application with teacher dashboards and an MS OneNote add-in, while also resolving critical connectivity limitations through a custom Android WIFI manager.
Highlights
Built a full-featured classroom management web application, including interactive teacher dashboards and an MS OneNote add-in for efficient student work capture and management.
Engineered a custom Android WIFI manager to enable mandatory school proxy authentication, successfully resolving a key connectivity limitation for students and staff.
Seoul, Seoul, Korea (Republic of)
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Summary
Developed and optimized WebView-based applications and widgets, enhancing device features and contributing performance improvements to open-source JavaScript libraries for smoother animations.
Highlights
Developed and optimized multiple WebView-based applications and widgets, seamlessly integrating device features and native app functionalities.
Contributed significant performance improvements to open-source JavaScript libraries (e.g., Sizzle, Swiper) by profiling rendering and memory with Chrome DevTools, enhancing animation smoothness.
Infraware
|Software Engineer
Seoul, Seoul, Korea (Republic of)
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Summary
Contributed to embedded web browser implementations for feature phones and successfully built and shipped an Android email application deployed across multiple LG smartphones.
Highlights
Contributed to the development and implementation of embedded web browsers tailored for feature phone platforms.
Designed, built, and successfully shipped a core Android email application, deploying it across a wide range of LG smartphones.
Languages
English
Proficient
Korean
Native
Skills
Frontend Development
JavaScript, TypeScript, React, React Native, Redux, Redux-Saga, Zustand, GraphQL, UI/UX Design, Web Applications, Mobile Applications, WebView, Chrome Extensions.
Backend Development
Ruby on Rails, Elixir, NestJS, Firebase, MySQL, Redis, Kafka, API Development.
Software Architecture & Optimization
Architecture Design, Performance Optimization, Lazy Loading, Rendering Strategies, Request Optimization, Network Overhead Reduction, System Scalability, Cost Savings.
Quality Assurance & DevOps
A/B Testing, E2E Testing, Playwright, Jest, React Testing Library (RTL), CI/CD, Production Incident Reduction, Automated Deployments.
Leadership & Project Management
Engineering Management, Team Leadership, Cross-functional Collaboration, Product Development, Mentoring, Strategic Initiatives, Agile Methodologies, Stakeholder Management.
Monitoring & Debugging
Sentry, New Relic, Chrome DevTools, Troubleshooting, Problem Solving, Analytics Integration.