Thinking / Engineering field notes
Field notes on improving a production frontend: diagnose performance, follow the product workflow, and examine the architecture decisions behind the result.
Keep each tab’s partner context separate.
Resolve identity deliberately at the boundary.
A constraint. A mechanism. A consequence.
Four ways into the work: performance, requirements, product workflows, and frontend system design.
Published on Medium01 / Choose the question
Each essay takes a different view of the work. Choose the question closest to your own product, from a slow interaction to a difficult architecture decision.
Why is the frontend slow?
An investigation of rendering bottlenecks, state boundaries, dependency cleanup, and bundle optimization in a production frontend.
You need to diagnose rendering and loading bottlenecks before choosing an optimization.
What should shape the architecture?
Why architecture begins with constraints and measurable qualities—not fashionable implementation patterns.
You need to assess whether a proposed architecture answers an actual product requirement.
What makes the workflow complex?
How offers, analytics, onboarding, permissions, and documents became one coherent product experience.
A feature crosses roles, permissions, and several connected product surfaces.
Where do the responsibilities belong?
Domain boundaries, impersonation, server state, real-time events, and the decisions behind a long-lived React platform.
You need to reason about identity and state ownership across a frontend platform.
02 / Keep the context connected
See the production system behind the essays, or use the Wiki to explore the frontend concepts underneath the decisions.
Follow the constraint.
Understand the choice.