Caesar Yuwono

• Managed 50+ European publisher accounts as strategic contact • Drove revenue growth via upselling, monetization & optimization • Increased individual account revenue by up to 2,000% • Identified opportunities through Excel and performance analysis • Led A/B tests to improve ad performance and yield • Advised on traffic quality, SEO & content structure • Conducted QBRs and optimization calls to drive retention • Collaborated with Product, Ad Ops & Analytics

• Reduced handling time by 1–2 min across customer service channels • Cut return rate by 15%, saving up to €50K/month • Improved operations through KPI analysis, audits & process optimization • Managed escalations, service recovery & goodwill decisions • Coordinated ~200 external agents and internal stakeholders • Monitored KPIs, SLAs & invoicing • Built Excel models for cost & performance reporting

• Performed internationally as a solo concert pianist across Europe and Asia • Released solo album Agony of Hope • Awarded prizes in multiple international piano competitions • Taught and mentored 90+ students across different ages and skill levels, focusing on performance development and discipline

Family business in distribution, specializing in the needs of PAL Indonesia (shipbuilding) as well as various other factories and customers. - Bookkeeping, maintaining financial records and adherence to compliance standards using advanced Excel spreadsheets. - Provided administrative support to the leadership. - Supported closing deals and managing deal auctions. - Controlled logistics management.