Heist Danmark App

Interactive survey and rewards app where users earn $HOINS coins to bid in live-streamed auctions or shop in the integrated marketplace.

Year

2024

Duration

10 months

Team Size

4 members

Project Overview

Heist Danmark App is a comprehensive mobile ecosystem combining market research, real-time entertainment, and e-commerce. Users complete surveys to earn $HOINS tokens, which serve as the app's currency. These tokens unlock two primary experiences: bidding in live-streamed auction events powered by WebRTC technology, and purchasing products from the integrated HEIST store. The platform creates a unique blend of gamification, social interaction, and tangible rewards, transforming traditional survey participation into an engaging, multi-faceted experience.

Client

Heist Danmark

Team

Mobile Developer (React Native)Backend Engineer (.NET Core)UI/UX DesignerQA Engineer

Technologies Used

React Native

React.js

Node.js

.NET

PostgreSQL

Redis

Socket.io

WebRTC

Push Notifications

Key Features

Live-streamed auction events with real-time bidding
Interactive survey platform with instant $HOINS rewards
Integrated e-commerce marketplace
Real-time token wallet and transaction history
Live chat during auction streams
Push notifications for upcoming auctions and surveys
User profiles with bidding history and achievements
Social leaderboards and gamification elements

Challenges & Solutions

Challenges

Maintaining sub-second latency for live auction bids across global users
Preventing survey fraud and ensuring data quality
Scaling WebRTC streams to thousands of concurrent viewers
Managing real-time token economy without blockchain overhead
Synchronizing auction state across mobile and web platforms
Handling payment processing for both token and fiat transactions

Solutions

Implemented Socket.io with Redis pub/sub for horizontal scaling of real-time features
Built WebRTC infrastructure with multiple quality tiers and automatic fallback
Developed fraud detection algorithms analyzing survey completion patterns
Created optimistic UI updates with server reconciliation for auction bids
Designed event-sourcing architecture for audit-able token transactions
Integrated CDN with adaptive bitrate streaming for global auction delivery
Implemented queue-based survey distribution to prevent spam

Results & Impact

100,000+ completed surveys with 85% completion rate

15,000+ active users participating in auctions weekly

€500K+ worth of $HOINS distributed

500+ successful auction events with 97% uptime

Average of 2,000 concurrent viewers per major auction

Partnership with 50+ research companies

4.6★ average app store rating

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