Forms
Show where Forms affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
CAREER PROJECT · Intermediate · 1–2 weekends
Production Checkout Experience
Build a checkout flow with validation, loading/error states, saved carts and accessibility.
FormsTypeScriptAccessibilityState machinesTesting
WHAT THIS PROJECT PROVES
Make the engineering visible.
This brief is designed as portfolio evidence for a Frontend Developer path. The goal is not to claim a hiring outcome; it is to make your implementation, judgment and tradeoffs easier to inspect.
TypeScript
Show where TypeScript affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
Accessibility
Show where Accessibility affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
State machines
Show where State machines affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
Testing
Show where Testing affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
BUILD PLAN
Finish the core before expanding the scope.
Use this as a project sequence, not a rigid tutorial. Your stack can change; the evidence should still show what you built, why you built it that way and how you know it works.
Define the scope and success criteria
Turn the brief into a small finishable system. Decide what the core Production Checkout Experience must do, what you will deliberately leave out, and how you will show that it works.
Build the core workflow
Build a checkout flow with validation, loading/error states, saved carts and accessibility. Keep the first pass focused on the main user or system flow before adding stretch features.
Add engineering proof
Create live checkout demo and form-state matrix. Document the decisions, failure states, tests, performance, security or operational tradeoffs that matter for this project.
Ship and package the evidence
Publish the strongest artifacts, including accessibility notes, test coverage, performance report. Make it easy for a reviewer to understand the problem, architecture, tradeoffs and what you personally implemented.
PORTFOLIO PROOF CHECKLIST
Leave artifacts a reviewer can inspect.
A strong project page should make it possible to understand the system without guessing what you personally built.
01
Live checkout demo
02
Form-state matrix
03
Accessibility notes
04
Test coverage
05
Performance report
06
A concise README explaining the problem, architecture and tradeoffs
07
A working demo, API example or reproducible run path
08
Evidence of testing, monitoring, performance, accessibility or reliability where relevant
RESUME / PORTFOLIO FRAMING
Describe what you actually did.
Implemented a production-style checkout flow with validated forms, resilient states and accessible interactions.
Use this as a starting structure, then replace it with your real implementation details, metrics and constraints. Do not claim outcomes you did not measure.
INTERVIEW TALKING POINTS
Be ready to defend the decisions.
These prompts turn the project from a repository link into a technical conversation about judgment, tradeoffs and evidence.
Why did you choose your approach to Forms, and what alternative did you reject?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
Where could Production Checkout Experience fail under real usage, and how would you detect or recover from that failure?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
How did TypeScript affect the rest of the design?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
What did you measure or test to prove Testing instead of only claiming it?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
If you had one more week, what would you improve first and why?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
STRETCH GOALS
Go deeper only after the core is solid.
Payment sandbox
Add it only if it strengthens the engineering story instead of delaying a finished, deployable core.
Localization
Add it only if it strengthens the engineering story instead of delaying a finished, deployable core.
Analytics events
Add it only if it strengthens the engineering story instead of delaying a finished, deployable core.
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