Freeman Onah
Freeman Onah

Data Engineer

Actively looking · Member since 23 Oct 2026
Location
Nigeria
Desired salary
Unspecified
Work preference
Remote Only
Experience level
Junior

About

Professional summary

I am a Data Engineer specializing in blockchain and on-chain financial data. I build production-oriented data pipelines that transform raw blockchain events into reliable, analytics-ready datasets and interactive dashboards.

I work with Python, SQL, PySpark, Apache Airflow, dbt, PostgreSQL, AWS, and GCP. My experience includes data extraction, transformation, cleaning, modeling, and pipeline design for financial and protocol reporting.

I have designed end-to-end pipelines for decentralized finance products, including DEX swaps, token transactions, lending protocols, and other DeFi instruments. I focus on improving data reliability, reducing manual reporting effort, and creating unified data models across protocols.

I have hands-on experience decoding Ethereum event logs and normalizing data from protocols such as Aave, Compound, and Morpho. I build extensible architectures that support onboarding additional EVM-based protocols and money markets.

I also develop analytics dashboards and forensic data tools for blockchain activity. My projects cover Ethereum network analysis, cross-chain DeFi analytics, ETL and ELT comparisons, and tracing asset movements after on-chain exploits.

Skills

14 capabilities

Tech stack & tools

Working toolkit

Data Stores

Development

Languages & Frameworks

Libraries

Experience

Career history

Data Engineer Crypto Start-up

Designed and maintained end-to-end data pipelines for on-chain financial products, including DEX swaps, token transactions, and DeFi instruments, using dbt, SQL, and Python.

Built and optimized dbt models for financial and protocol reporting to improve data reliability and reduce manual effort. Developed Dune Analytics dashboards for Ethereum and TON activity, tracking TVL, trading volume, liquidity, and user growth, and created pandas scripts for extraction, transformation, cleaning, and ad-hoc modeling.

Education

Learning history
No education data available.

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