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Eunso Ahn

Frontend Engineer

I turn complexity into simplicity by examining the heart of a problem through deep focus and a structured approach.

I understand the diversity of users and contexts, define problems proactively, and build thoughtful solutions.

Experience

Datarize

Frontend Engineer

Jan 2026 - Apr 2026

B2B SaaS platform for CRM marketing automation based on e-commerce customer data.

[AI Feature]

Improved widget-creation completion with AI prompt-based widget design

  • Identified high abandonment in the manual widget-design setup flow
  • Designed and implemented an AI chat feature that generates widget designs from natural-language prompts
  • Improved widget-creation completion from 11% to 37% by refining the design flow
[UX Improvement]

Reduced client engineering dependency and support requests with easy widget insertion

  • Identified recurring client engineering support and CS needs caused by script-based installation
  • Implemented logic that extracts the selected DOM element path and inserts widgets dynamically at that location
  • Enabled marketers to install widgets directly without engineering resources
[UX Improvement]

Improved recommendation accuracy and exposure efficiency through Cafe24 integration

  • Identified reduced recommendation efficiency when items already in the cart reappeared in recommendation widgets
  • Integrated the Cafe24 Front API SDK and cart lookup to exclude cart items from recommendations
  • Skipped unnecessary API calls in test mode to reduce request costs
[Technical Debt]

Reduced maintenance cost and strengthened UI consistency through design-system migration

  • Identified reduced consistency and maintainability from mixing a legacy design library with a new design system
  • Built a gradual release, Playwright visual-regression, and Storybook-based verification process
  • Documented component mapping rules and verification steps into a repeatable migration guide

YDNS

Intern

Apr 2021 - Jul 2021

IT solutions company building public-sector data platforms and smart administrative systems.

  • Collected and processed Seoul public-data APIs, then implemented data visualizations from the stored data

Projects

Moitz

Frontend Engineer

Jul 2025 - Nov 2025

A web service that recommends meeting midpoints and venues based on Seoul subway lines (Woowa Tech Course team project).

[Loading Performance]

Improved FCP by 86% on the map-based results page with dynamic Naver Map loading

  • Identified render blocking from map scripts running on routes unrelated to maps
  • Removed the synchronous Naver Map script from index.html, eliminating 1.2 seconds of render blocking
  • Designed a dynamic script loader with loading and error-state hooks to load the map API only on the results page
  • Improved FCP from 4.4s to 0.6s and Lighthouse performance from 46 to 57
[CI/CD]

Built a secure frontend deployment pipeline with GitHub Actions and OIDC

  • Identified single-point-of-failure and access-management risks from a self-hosted EC2 runner
  • Implemented least-privilege S3 and CloudFront access with GitHub-hosted runners, AWS IAM OIDC, a dedicated deployment role, and branch-based trust policies
  • Added ESLint, TypeScript, and Jest checks; artifact deployment, CloudFront invalidation, and concurrency controls
[UX Improvement]

Improved URL sharing with meeting-specific social preview cards

  • Identified that the CSR SPA exposed only fixed OG metadata for every meeting result URL
  • Used CloudFront Functions to detect bots, parse query strings, and generate head-only HTML with dynamic OG metadata
  • Surfaced meeting details in social preview cards to improve link trust and sharing

Tito

Backend Engineer

Apr 2024 - Dec 2024

Real-time discussion community app with LLM-based language correction (Silver Prize, 2024 ICT Mentoring Hanium Track).

[Real-time Chat]

Implemented real-time discussion chat with WebSocket

  • Implemented custom endpoints and message formats with a low-level protocol
  • Used ping/pong keep-alives to prevent inactive-session termination and ensure stable long-lived connections
[Notifications]

Built FCM-based push-notification infrastructure

  • Identified the difficulty of checking discussion starts, mentions, and new messages in a webview app
  • Implemented participation, subscription, and topic-based push routing with Firebase Cloud Messaging
  • Increased user return visits and encouraged real-time participation

Training

An intensive Woowa Brothers program designed to develop early-career software engineers with one year of junior-level capability.

  • Built TDD and maintainability-focused design skills through eight missions based on pair programming and peer code reviews
  • Strengthened metacognition and practiced a culture of shared growth through continuous retrospectives, writing, and Tech Talk presentations
  • Led the full lifecycle of team projects - planning, deployment, and operation - gaining practical collaboration and service-operation experience
  • Built a developer-experience-focused library through a Hook study, designed its interface, and published it as an npm package

Talks

Applying Dynamic OG Tags in a CSR Environment

25/26 GDGoC Soongsil Joint SeminarNov 2025

Troubleshooting talk on detecting bot requests with CloudFront Functions edge computing, implementing dynamic OG tags, and evaluating trade-offs against Lambda@Edge.

Rethinking Components with Flexibility

Woowa Tech Course 7th Tech TalkAug 2025

Shared practical component-design strategies for maintainability, including dependency cohesion, the Headless pattern, and model-level separation.

A Design System Developers Can Build

24/25 GDGoC Soongsil SSUMALL SeminarAug 2025

Introduced design tokens and component structuring for developer productivity and consistent UI/UX, with practical guidance for small projects.

Activities

Google Developer Groups on Campus in Soongsil

MemberSep 2023 - Present

Participated in the developer and Google-technology community as a 3rd-gen Server member, 4th-gen DevRel, and 5th-gen Member.

Soongsil University Board Club (4S)

PresidentJan 2023 - Jan 2024

Led a 300-member sports-board club and planned, ran, and oversaw 40+ online and offline events annually, earning first place among university clubs. Planned inter-university events and collaborated with the Korea University Sports Board Federation (KUSBF).

Awards

2024 Cloud Idea ContestGrand Prize (Busan Mayor's Award)
Dec 2024
2024 ICT Mentoring Hanium TrackSilver Prize (IITP President's Award)
Dec 2024

Education

Soongsil UniversityB.S. in Computer Science (Convergence Major: ICT Distribution & Logistics)
Mar 2020 - Feb 2026

Certifications

TOEIC Speaking · IHTOEIC / International Certification
Nov 22, 2025
Engineer Information ProcessingHuman Resources Development Service of Korea
Jun 13, 2025
MOS Excel Expert 2016Microsoft / International Certification
Dec 8, 2021

Technical Skills

LanguagesJavaScript, TypeScript, HTML, CSS
Frameworks & LibrariesReact, Next.js, Emotion, Styled-components, Storybook, jQuery
ToolingESLint, Prettier, Webpack, Vite, npm, yarn
CollaborationGit, GitHub | Jira, Linear, Notion | Google Analytics, Sentry | Figma, XD, Zeplin, Miro
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