PWA
Show where PWA affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
CAREER PROJECT · Advanced · 2 weekends
Offline-First Field App
Ship a PWA that remains useful with weak connectivity and synchronizes safely when online.
PWAService workersIndexedDBSync UXPerformance
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.
Service workers
Show where Service workers affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
IndexedDB
Show where IndexedDB affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
Sync UX
Show where Sync UX affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
Performance
Show where Performance 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 Offline-First Field App must do, what you will deliberately leave out, and how you will show that it works.
Build the core workflow
Ship a PWA that remains useful with weak connectivity and synchronizes safely when online. Keep the first pass focused on the main user or system flow before adding stretch features.
Add engineering proof
Create installable app and offline demo. 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 sync strategy, lighthouse report, failure-state notes. 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
Installable app
02
Offline demo
03
Sync strategy
04
Lighthouse report
05
Failure-state notes
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.
Built an offline-first PWA with local persistence, background synchronization and explicit conflict states.
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 PWA, and what alternative did you reject?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
Where could Offline-First Field App 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 Service workers 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 Performance 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.
Push notifications
Add it only if it strengthens the engineering story instead of delaying a finished, deployable core.
Queue retries
Add it only if it strengthens the engineering story instead of delaying a finished, deployable core.
Device APIs
Add it only if it strengthens the engineering story instead of delaying a finished, deployable core.
RELATED PORTFOLIO PROJECTS
Build another signal in the same path.
Choose another project only when it proves a different part of the role instead of repeating the same evidence.
Intermediate1 weekend
Accessible Product Dashboard
Build a responsive data dashboard with optimistic UI, keyboard navigation, performance budgets and accessible states.
ReactTypeScriptAccessibilityPerformanceTesting
Open project brief →Advanced2 weekends
Realtime Collaboration Board
Create a multiplayer board with presence, optimistic updates, conflict handling and reconnect states.
ReactWebSocketsState managementRealtime UXTesting
Open project brief →Intermediate1–2 weekends
Production Checkout Experience
Build a checkout flow with validation, loading/error states, saved carts and accessibility.
FormsTypeScriptAccessibilityState machinesTesting
Open project brief →