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Resume

YOOK JAESEO

Performance Marketer Scaling Social Impact Through Data

Designing sustainable growth by combining data analytics expertise with deep insights into social innovation. Based on sociological insights, I propose data-driven marketing solutions to ensure the missions of non-profits are effectively communicated.

Experience

Growth Marketer
Jul 2025 ㅡ Present
Ddangs Food Co., Ltd. / Food Platform Team
  • Efficiency (1): Optimized coupon unit economics by analyzing user redemption patterns, reducing marketing burn rate by 12% while maintaining order volume.
  • Efficiency (2): A/B tested personalized discount structures (fixed vs. percentage), improving conversion rate by 18% for stagnant user segments.
  • User Acquisition: Spearheaded "First-Order" acquisition campaigns across digital channels, driving a 25% Increase in new user acquisition MoM.
  • Retention&CRM: Developed data-driven CRM loops to re-engage lapsed users, resulting in a 10% uplift in 7-day retention rates.
Performance Marketer
Jul 2024 ㅡ Jul 2025
Sangsangwoori Co., Ltd. / Education Service Team
  • Campaign Strategy & Execution: Planned and executed end-to-end performance marketing campaigns across Meta, Naver, and Karrot, resulting in a 20% increase in MoM conversion volume.
  • A/B Testing: Conducted weekly creative and copy A/B tests to lower customer acquisition cost by 12% while maintaining lead quality.
  • Budget Management: Managed a monthly advertising budget of ₩4,000,000(about $2,700), consistently achieving an average ROAS of 400%+.
BTL Marketer
Jul 2023 ㅡ Jun 2024
Project Question Co., Ltd. / Planning Team
  • Led multi-stakeholder offline activation projects from kickoff to closeout, managing a total budget of ₩10,500,000(about $7,200).
  • Produced comprehensive artifacts including run-of-shows, comms packs, and impact reports for large-scale events (50,000+ attendees).

Social Sector Experience

Public Sphere Facilitator
Mar 2020 ㅡ Jul 2024
Parti Co-op / Freelancer
  • Planned and facilitated large-scale public forums to promote digital democracy and civic participation.
Web Service QA & Coordinator
Jul 2023 ㅡ Jun 2024
Sea Saving Network / Freelancer
  • Managed QA and improved user experience for 'Ocean Keeper,' a platform supporting citizen-participatory marine cleanup.
Research trainee
Jan 2019 ㅡ Aug 2019
Civil Education Network in Asia (CENA)
  • Conducted case studies on international peace and state violence to support civil society.

Selected Case Studies

Growth Marketing
Delivery Platform Full-Funnel Optimization
Integrated Marketing
Launching 'Passion College' Community
BTL Strategy
'Donuimun Market' Creator Partnership
Public Program Design
Empowering Seniors' Second Acts

Skills

Performance Marketing Social Impact Management Stakeholder Alignment Project Management Impact Reporting Copywriting Public Sphere Facilitation

Tools

Meta Business Suite Naver Search Ads GA4 / GTM Advanced Excel Jira Notion HTML/CSS/JS


Education

Sungkonghoe University, Seoul, Korea
Bachelor of Arts in Sociology | Aug 2025
Focus on social structures, class, gender, and human rights