Narcis C.

1. Decentralized Non-Custodial Wallet:

• Developed a decentralized non-custodial wallet that bridges Web2 and Web3 users, enabling seamless interaction with Web3 applications.
• The wallet delegates key storage to a network of nodes, each holding a share of the key, and utilizes a multi-party ECDSA scheme for user signatures.
• This solution offers features similar to MetaMask, with the added advantage of distributed key storage managed by a node network and a threshold for generating signatures.
• Accessible from anywhere on the web without the need for private key import. Technologies used: NodeJS (Backend, SDK) and Rust (multi-party ECDSA).

2. Cross-Network Social Media Data Sharing Protocol:

• Designed a protocol for sharing and syncing data across different social media networks using blockchain as an index and IPFS for raw data storage.
• This innovative approach enables seamless data sharing and synchronization between social media platforms, enhancing user experience and promoting cross-platform engagement.

Developed the backend (using Koa) for a high-traffic TikTok-like platform with over 2 million unique daily visitors. Key contributions include:

• Designing and implementing a feed algorithm and injection engine powered by Elasticsearch.
• Utilizing Redis caching to handle massive request volume and Bull Queues for scalability.
• Developing integrations with external services, fraud alerts, and internal notifications.
• Implementing messaging systems for enhanced user communication.
• Handling video (HLS and regular codecs) and image processing with ffmpeg.
• Creating advanced search APIs to query aggregated datasets in Elasticsearch for internal security and administrative teams.
• Continuously exploring innovative solutions to enhance platform performance and user experience.