Blockchain Data Infrastructure Engineer

Role purpose

Own the blockchain data layer that converts messy, multi-chain activity into standardized, reconciled, audit-ready financial records.

Key responsibilities

• Build ingestion pipelines for blockchain, wallet, exchange, DeFi, custodian, and off-chain transaction data.

• Normalize transactions across chains, assets, token standards, smart contracts, NFTs, stablecoins, and DeFi protocols.

• Develop classification logic for transfers, swaps, staking, lending, bridging, gas fees, rewards, liquidations, and contract interactions.

• Support wallet-by-wallet cost-basis tracking, entity mapping, reconciliation, and sub-ledger creation.

• Build chain adapters and data quality checks for accuracy, completeness, duplicate detection, missing data, and failed transaction handling.

• Partner with product and accounting experts to map blockchain events into finance-native transaction categories.

• Design monitoring tools for chain data availability, indexing failures, reorgs, API latency, and provider outages.

• Support Kednus’s goal of turning 200+ blockchains into audit-ready institutional financials.

Required qualifications

• 5+ years of data engineering, blockchain infrastructure, crypto accounting, or distributed-systems experience.

• Strong understanding of blockchain transactions, wallets, smart contracts, token standards, explorers, RPC nodes, indexers, and event logs.

• Experience with data pipelines, ETL/ELT, streaming systems, and large-scale transaction datasets.

• Proficiency in Python, SQL, TypeScript, Go, Rust, or similar.

• Experience working with APIs, RPC endpoints, webhooks, indexers, and data providers.

• Ability to build resilient systems that detect data anomalies and reconcile inconsistent sources.

Preferred qualifications

• Experience with Ethereum, EVM chains, Bitcoin, Solana, Cosmos, Polygon, Base, Arbitrum, Optimism, Avalanche, or other major chains.

• Familiarity with DeFi protocols, bridges, custodians, exchanges, and tokenized real-world assets.

• Experience with graph databases, entity resolution, wallet clustering, or fraud analytics.

• Knowledge of accounting treatment for crypto transactions.

First 90-day success outcomes

• Deliver a prioritized chain coverage roadmap.

• Build reusable chain adapter patterns.

• Establish transaction normalization schemas.

• Improve transaction classification and reconciliation accuracy.