Engineering & Deep Dives

Engineering deep dives, runtime internals, language specifications, and systems architecture notes.

Core Principles

Domain-First Mindset: Software exists to solve expensive business problems. Always master the business and financial domain first — implementation details follow.
Ownership & Action: Convert complaints into actionable, trackable tasks with clear owners and exit criteria.
Predictable Delivery: Tasks committed to an iteration must be delivered through realistic planning, task decomposition, and early risk signaling.
Async-First Communication: Communicate with full context asynchronously to protect deep work and focus time.

C4 Model: Use the C4 model and Structurizr for multi-level architectural blueprints.
Diagrams as Code: Standardize on Mermaid for architecture graphs and sequence flows.
YAGNI & TDD: Build extensible designs, but implement only what is required now.

Deployment Method	Mechanism	Primary Use Case
Blue/Green	Two identical production environments. Traffic cutover is instantaneous via load balancer / DNS.	Critical systems requiring zero-downtime and instant rollbacks.
Canary	Incremental traffic routing to new version using metric baselines.	High-scale consumer and SaaS services to validate changes under live traffic.
Rolling	Step-by-step phased replacement across pods or server clusters.	Stateless containerized services with capacity headroom.
Recreate	Full teardown of existing version followed by fresh deploy.	Development/testing environments or breaking database schema shifts.