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Trekka
Trekka started as a hackathon project and is being developed into a startup. The core idea: replace costly middlemen in everyday P2P services — merchant onboarding, ride-hailing, courier, recycling, marketplace trades — with a decentralized mediator model. Users discover and claim tasks as gamified quests with XP rewards and instant Hedera payouts. Built with Flutter (MVVM) for the mobile app and NestJS + PostgreSQL + PostGIS for the backend. Currently stalled but will be picked up.
Full Stack Engineer (Mobile & Backend)Started Jan 20240 stars0 forks
// Tech Stack
FlutterDartHedera SDKGoogle Maps APIFirebaseRedisNestJSPostgreSQLPostGIS
Key Features
- ✓Map-based quest discovery — find nearby tasks using Google Maps and PostGIS geofencing
- ✓Decentralized mediator model — smart contract logic replaces traditional platform middlemen
- ✓On-chain instant payouts via Hedera SDK — no withdrawal delays
- ✓XP reward system — gamified progression for completing quests
- ✓Flutter MVVM mobile app — clean architecture for scalability
- ✓NestJS backend with PostGIS — location-aware queries at scale
Challenges Faced
- →Designing a fair task allocation system under concurrent load — same problem space as Landdropped
- →Integrating Hedera SDK for on-chain payouts in a Flutter mobile app
- →PostGIS geofencing for real-time location-based task matching
- →Team of two (engineer + designer) — full stack ownership across mobile and backend
Key Learnings
- 💡Hedera Hashgraph — different consensus model from Ethereum, faster finality, lower fees
- 💡PostGIS spatial queries — indexing and querying geolocation data efficiently
- 💡Decentralized system design — trust, fairness, and incentive mechanisms without a central authority
- 💡Leading a small product team from hackathon to startup exploration