Looking at JIRA’s issues and workflows as a graph of work units — covering the Sprint lifecycle, issue hierarchy, Git/GitHub integration patterns, and automation flows.

GitHub Actions seen as an event-driven automation engine — the three-layer abstraction of workflow / job / step, plus the operational details of triggers, runners, and secrets.

My father wrote a poem in Korean and called it 참회(懺悔), ‘Repentance.’ The full poem, followed by my short response.

Looking at GitHub PRs as a collaboration layer added to Git’s change graph, and walking through the Code Review cycle, PR-level design, and merge strategies.

Looking at Git as a graph of changes — and seeing how commit hygiene, branching strategy, and the merge-vs-rebase choice are all decisions about the shape of that graph.

Retrospective on building a system that automatically identifies low-performing SSP inventory and throttles traffic to improve contribution margin. Covers the evolution from Imp Cost Ratio to a predicted contribution margin rate approach.

An SLA isn’t kept by monitoring after the fact — it’s built by design and held by operation. Once the SLI for a low-latency service becomes p99 latency rather than availability, timeout budgets, caching, degradation, isolation, and load shedding build the SLA, while p99 SLOs, burn-rate alerting, headroom, deploy gates, and the review cycle hold it.

Covers technical indicators (RSI, SMA Cross, MACD, Bollinger Bands) for reading price movements, composite signal design, and a comparison of three strategy types across different time horizons.

Covers factor scoring methods (Z-Score, Rank) for combining indicators into a single score, plus the basics of rebalancing and asset allocation.

Covers the role of price momentum and dividend yield as factors in quant investing.