Engineering Case Studies

Each case makes the problem, constraints, decisions, outcomes, and evidence scope visible—not just the project name.

01 EY Han Young March 2026–Present AI-native Tax Platform Designing a multi-agent tax assistant, agentic workflows, a verifiable retrieval layer, and an Azure serverless runtime for professional tax work. Established the product, knowledge, validation, and runtime foundations for an AI-native tax work platform. Read the case study 02 Pluglink March–August 2025 M&A Technology Integration A phased serverless carve-out, network consolidation, and engineering standardization program for post-acquisition technical independence. Contributed to technical independence, stable integration, and the planned termination of the TSA. Read the case study 03 Pierrot Company May 2024–March 2025 Payment System Stabilization An idempotent asynchronous payment architecture and customer recovery workflow that turned failed payments into measurable operational and revenue outcomes. Reduced the batch from roughly 3 hours to about 10 minutes and recovered approximately KRW 330M in overdue receivables by February 2025. Read the case study 04 Chain Lightning Company November 2021–May 2024 Generative AI Product Pivots A sequence of grounded generative-AI product pivots across legal work, document automation, and travel planning, built on reusable production capabilities. Expanded into legal tech, document AI, and travel tech; an eight-person team launched the Tripmate MVP in two weeks. Read the case study

Evidence-led Engineering

Case-study methodology

Every case is based on owner-authored career records in the resume. Confidential implementation details are omitted, and numerical outcomes identify their measurement window.