I don't just ship features.

I understand business goals, document decisions and trade-offs, and record outcomes.

I also capture what could be improved — to make better decisions next time.

I'm Lee Hyungi, Infrastructure & Backend Engineer focused on building systems that move real business metrics.

Every major decision is documented—because great engineers don't just build things, they explain why.

Read my journey

Recent Decisions

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Jun 2024

Transitioning to Remote-First Team Structure

Post-pandemic, our team was split between office and remote workers. The hybrid model created two classes of employees and made collaboration inconsistent. We needed to decide on a deliberate approach.

Mar 2024

Adopting Event-Driven Architecture for Order Processing

Our synchronous order processing pipeline was becoming a bottleneck. Long-running operations blocked the checkout flow, and failures in downstream services caused cascading issues.

Problems I Enjoy Solving

How to scale systems without scaling complexity · When to choose consistency over availability · Making legacy codebases maintainable · Designing APIs that last · Building teams that ship · Turning technical debt into technical investment · Documenting decisions so future-you understands past-you