Design System, UX, Security
Build components that communicate risk, progress, and trust
Finance frontend interviews often probe the UI layer: amount fields, status timelines, approvals, accessibility, feature flags, security boundaries, and safe defaults.
Explain how a design system prevents repeated mistakes in financial workflows.
Domain Components
Reusable primitives should encode domain constraints: amount precision, network mismatch, status timelines, approval steps, and risk acknowledgment.
Design the transfer component set
System DesignSenior45mSpecify AmountInput, CurrencyAmount, WalletStatus, NetworkAlert, ApprovalStepList, StatusTimeline, and ReconciliationBanner.
Focus on behavior and states, not only visual variants.
Implement an accessible money input contract
CodingSenior45mDefine parsing, formatting, validation, keyboard behavior, aria-describedby errors, and minor-unit output.
This is a compact but high-signal coding exercise.
Safe Interaction Design
The UI should prevent risky repetition while still explaining what is happening and what the user can do next.
Design safe submit and retry behavior
ArchitectureSenior40mDefine when buttons disable, when retry appears, how copy changes, and how support/audit references surface.
Avoid optimistic balance updates for actual money movement.
Review a transaction timeline for accessibility
DebuggingMid30mFind missing labels, bad focus order, color-only state, live-region noise, and ambiguous status copy.
Senior frontend interviews often hide accessibility issues inside otherwise polished UI.
Frontend Security
Frontend security in finance is about boundaries: rich content, wallet prompts, third-party scripts, feature flags, secrets, and phishing-resistant copy.
Explain XSS/CSP risks from rich frontend experience
ConceptSenior25mConnect rich-text/editor experience to sanitization, trusted HTML boundaries, CSP, and dependency hygiene.
This lets you reuse your editor background in a finance context.
Design feature flags for a risky financial UI rollout
ArchitectureSenior35mCover cohort rollout, kill switches, audit logging, analytics, fallbacks, and stale flag cleanup.
Tie this to migration safety and beta rollout experience.