Rapid Prototype of Kids Interactive Mobile App

We're building a rapid prototype of an interactive educational mobile
app for young children (ages 4–7). Looking for an experienced Flutter
developer who can deliver a working iOS + Android build in ONE WEEK.

This is a prototype to validate the concept — not a production-ready
shipping app. We need it functional, smooth, and presentable. Polish
comes later.

The prototype is a SINGLE-SCREEN INTERACTIVE SCENE with approximately
20 tappable elements. Each tap triggers an audio playback and a small
visual animation. No backend, no user accounts, no analytics, no
parent dashboard.

The full specification document will be shared with the selected
developer under NDA.

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WHAT YOU WILL BUILD
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- A Flutter app for iOS and Android (one codebase)
- One main interactive scene with ~20 individually tappable objects
- Each tap triggers: a short audio file + a scale-bounce animation +
haptic feedback
- Clean audio architecture (one audio at a time, new taps interrupt
cleanly)
- Minimal app shell: splash screen, main scene, simple settings page

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ASSETS — IMPORTANT
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You are responsible for sourcing or creating the visual assets for
this prototype. We will provide:

- A detailed visual brief describing every asset needed (size, style,
color palette, positioning)
- A strict color palette with exact hex values
- Reference images and mood board
- All audio files (MP3, ready to use)

You may use any of the following approaches for the visual assets:
- AI image generation (Midjourney, DALL-E, Nano Banana, etc.)
- Royalty-free vector libraries (Freepik, Flaticon, etc., with proper
licenses)
- Stock illustrations
- Your own quick illustrations if you have the skill

The visual quality target is PROTOTYPE LEVEL — recognizable, consistent,
and on-palette. Pixel-perfect production art will be commissioned
separately in Phase 2 and slotted in to replace the prototype assets.
What matters now is that the prototype looks coherent enough to test
with real users and demo to stakeholders.

Important: All assets you source must have commercial-use licenses
that we can verify. Provide license documentation with delivery.
Do not use copyrighted material without proper licensing.

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TECHNICAL STACK (required)
================================================================
- Flutter (latest stable)
- Riverpod for state management
- just_audio for audio playback
- go_router for navigation
- Hive for local storage (settings only)
- Flutter HapticFeedback API
- Standard Flutter animation framework — no third-party animation libs

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DELIVERABLES (end of week)
================================================================
1. Complete Flutter project source code (clean, commented)
2. Working iOS build (testable via TestFlight or signed IPA)
3. Working Android build (signed APK)
4. All sourced/created visual assets with license documentation
5. README documenting project structure and build instructions
6. Delivery via private GitHub repository

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PERFORMANCE TARGETS
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- 60 FPS on mid-range devices
- Cold start under 3 seconds
- Tap response under 100 ms
- 100% offline after install (no network calls)
- Install size under 80 MB

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NON-NEGOTIABLE REQUIREMENTS
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- No advertisements
- No third-party tracking SDKs (no Firebase Analytics, no AdMob, no
off-device crash reporters)
- No external links in the UI
- All sourced assets must have valid commercial-use licenses
- Code must be original, not copy-pasted from tutorials

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TIMELINE — 1 WEEK
================================================================
- Day 1: Kickoff call, NDA, repo setup, asset brief walkthrough
- Days 2–4: Asset sourcing/creation + Flutter scene build
- Days 5–6: Audio integration, animations, polish
- Day 7: Final builds delivered, testable on real devices

Daily async update expected at the end of each working day (Slack,
Telegram, or WhatsApp — your choice).

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WHO WE'RE LOOKING FOR
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- Minimum 3 years of professional Flutter experience
- At least 2 published apps live on both App Store and Play Store
(links required in your bid)
- Demonstrated ability to source or create visual assets quickly (AI
tools, vector libraries, or your own illustration)
- Comfort with Riverpod (not just Provider or Bloc)
- Strong written English; daily updates expected
- Available for at least 4 hours of overlap with European time zones
- Can commit to working at sustained pace for 7 consecutive days

Bonus (not required):
- Experience building apps for children
- Experience with rapid-prototype delivery under tight deadlines
- Design sensibility (eye for color, composition, simple animation
feel)

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HOW TO BID
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Please include in your proposal:

1. Links to 2+ apps you have published, ideally with audio/animation
complexity
2. A brief note (3–5 sentences) describing how you would source or
create the ~20 visual assets in this timeline
3. Your fixed-price quote for the 1-week scope described above
4. Confirmation you can sign an NDA before receiving the spec
5. Confirmation you can START this week and commit to 7 consecutive
days

Bids that do not address all five points will be ignored. Generic
copy-paste bids will be ignored.

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ABOUT US
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This is a rapid prototype. The selected developer will be the first
candidate considered for the Phase 2 production build (longer
timeline, professional illustrator on board, additional scenes,
parent dashboard, subscription integration) — assuming Phase 1
delivery is fast, clean, and reliable.

We are a small, focused team. We pay on time. We give clear briefs.
We don't micromanage. We expect the same professionalism in return.

Thank you for reading — we look forward to your bid.