Closed-Community Collaboration App Development -- 3

Job ID: 40204340

Budget: $900 – $1,300 USD

ATTENTION: I am looking for a high-performing Individual Lead Developer. No agencies. No task-completers. If you are unreliable, unpunctual, or expect to be micromanaged, do not apply. I need a technical partner who takes ownership and is hungry to build a world-class product.

The Project
A sophisticated, closed-community platform (Stealth Mode) with high-end UI/UX. The Figma designs are complete. I need you to implement them with a "premium" feel—meaning fluid animations, micro-interactions, and flawless performance.

Detailed Core Scope:
Security & Access: * Whitelist System: Registration restricted to specific domains/verified users only.

Strict German GDPR (DSGVO): EU-based infrastructure, "Privacy by Design," and full data encryption are non-negotiable.

Social & Communication:

Real-time Messaging: High-speed 1-on-1 Chat and Group Messaging functions.

Friends System: "My Network" management (adding/removing friends, social graph).

Groups: Dedicated spaces for categorized communication and file sharing.

Organization & Productivity:

Event Management: Full Calendar integration. Create events, send invitations to friends/groups, and manage RSVPs.

To-Do System: Integrated task management for users.

Document Repository: System to upload and categorize PDFs/Images within groups.

Gamification & Logic:

"The Battle" Logic: Real-time competitive features where users/groups compare activity stats via live leaderboards.

Matching Algorithm: Fast, swipe-based logic for community discovery.

Native Features: iOS/Android Home Screen Widgets and full Localization (DE, EN, FR, ES).

My Non-Negotiable Terms:
Fixed Price Only: I do not work on an hourly basis. This project is structured via Fixed-Price Milestones. Total budget certainty is required.

Proven European Experience: You must provide links to at least 2 live apps in the European/German market. I need to see that you understand EU quality standards.

Absolute Reliability: Flawless English and 100% punctuality for calls are mandatory. If you miss a meeting without notice, the collaboration ends immediately.

How to Apply (The Professional Filter):
To ensure you have the attention to detail required, you must answer the following:

Start your application with the word: "INTEGRITY".

Portfolio: Provide links to 2 apps you've built for the European market.

Logic Question: How would you architect the Whitelist and Friends system to ensure it remains fast as the user base grows?

GDPR Question: Technically, how do you handle a "Right to be Forgotten" request across a database involving shared groups and leaderboards?

Timeline: Can you commit to delivering a production-ready MVP in 6 weeks on a fixed-price basis?