System Design + Mock Loop
Practice full interview loops around finance-grade frontend systems
Close with complete mock loops: product requirements, frontend architecture, state machines, API boundaries, testing strategy, behavior stories, and reverse questions.
Be able to lead a 45-minute system design interview for a tokenized transfer console from requirements to rollout.
Frontend System Design
Mid-senior frontend system design is about decomposing product workflows into durable client architecture, backend contracts, and team-operable surfaces.
Design a tokenized transfer console
System DesignSenior60mCover routes, data ownership, wallet integration, operation state, API contracts, testing, observability, and rollout.
Use this as the master whiteboard drill.
Design a status-driven finance design system
System DesignStaff-leaning50mDefine primitives, state vocabulary, accessibility rules, token strategy, documentation, and adoption plan.
This shows senior-plus leverage beyond a single screen.
Capstone Project Framing
A small portfolio project can prove the same skills: React/TS UI, typed API, smart-contract-aware state, testing, and reconciliation.
Scope the tokenized-deposit demo project
ArchitectureSenior45mDefine the smallest credible demo: dashboard, transfer wizard, detail page, pending persistence, mock backend, tests, and Storybook states.
Do not build a giant dapp. Build a focused interview artifact.
Prepare the first-90-days answer
BehavioralSenior30mDescribe how you would learn domain rules, read code, earn trust, improve tests, and ship safely in a finance frontend team.
This makes the ramp-up story concrete.
Mock Interview Loop
The final pass converts preparation into interview performance: concise answers, tradeoff language, live coding discipline, and follow-up questions.
Run a 45-minute architecture mock
System DesignSenior45mPractice requirements, constraints, architecture, edge cases, testing, migration plan, and risks without drifting.
Record or write down where the explanation became vague.
Run a 35-minute coding + narration mock
CodingSenior35mImplement a state reducer, amount parser, or merge function while explaining tradeoffs and tests.
Interviewers are listening for judgment while you code.