BlockStream — Real-Time Blockchain Financial Data

Company: SupperTree, South Korea · Role: Software Engineer

A scalable system for real-time monitoring and processing of blockchain transaction data from Ethereum and Polygon networks, using a publish-subscribe model for efficient data delivery.

Key Contributions

• Designed end-to-end pipelines: on-chain collection → Kafka → PostgreSQL + OpenSearch / Algolia for sub-second indexing of Ethereum and Polygon transaction data.
• Applied transaction pattern analysis and anomaly flagging — methodology directly transferable to payment fraud detection.
• Ensured data integrity and auditability across high-throughput decentralized financial data flows, including enriched metadata (images, links) for advanced search.

Tech Stack

Python · Golang · Apache Kafka · Algolia · OpenSearch · PostgreSQL · Oracle · Kinesis