Roland Ringgenberg (ringgi)

Suhr, AG, CH

Build with Gemini XPRIZE

Featured

Online

$2,000,000 in prizes. Build with Gemini. Ship products that impact the world.

$2,000,000 in prizes
Aug 17, 2026 04:00 PM EDT to submit
14408 participants

Hedera22: Hello Smart Contracts

Online

Build the next game-changing decentralized application with scalable Solidity Smart Contracts on Hedera.

$864,000 in prizes
Winners announced
2472 participants

Hedera21 - Hello Tokenization

Online

The future will be tokenized. Come and build a fast, fair, and secure application that takes advantage of Hedera’s new Token Service (HTS).

$137,500 in prizes
Winners announced
600 participants