Stephen Oni
Senior Software Engineer at Datopian
Lagos State, Nigeria
Summary
🤩
Rockstar🎓
Top SchoolStephen Oni is a Senior Software Engineer with nine years of experience building performant backends, scalable APIs, and developer-focused tools for public sector, research, and enterprise clients. He designs and ships API-first platforms, data ingestion pipelines, real-time streaming, and ETL workflows—often adding observability and role-based access control to production systems. A pragmatic polyglot, he primarily uses Go, Rust, Python, and TypeScript and contributes to notable open-source projects like CKAN and Danfo.js, modernizing legacy codebases and expanding data-manipulation APIs. At Datopian he led technical direction on major data portals and has applied ML and retrieval systems in prior roles, including multilingual sentiment analysis and machine translation prototypes. Beyond production systems, he builds developer tooling and CLIs (see github.com/steveoni), demonstrating a focus on developer experience that often surfaces in community-facing libraries. Based in Lagos, he blends deep engineering craft with practical data engineering and open-source stewardship.
9 years of coding experience
2 years of employment as a software developer
Bachelor of Technology (B.Tech.), Physics-Electronics, Bachelor of Technology (B.Tech.), Physics-Electronics at Federal University of Technology AkureMaster's degree, Machine Intelligence, Master's degree, Machine Intelligence at African Institute for Mathematical Sciences (AIMS)
Stackoverflow
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Github Skills (31)
javascript10
aggregate10
npm10
back-end-development10
python10
aggregator10
data-manipulation10
dataframes10
time-series10
nextjs10
dataframe10
ag10
ckan10
aggregations10
yarnpkg10
Programming languages (10)
Github contributions (5)
javascriptdata/danfojs
Jun 2020 - Jan 2023
Danfo.js is an open source, JavaScript library providing high performance, intuitive, and easy to use data structures for manipulating and processing structured data.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:9 reviews, 273 commits, 31 PRs in 2 years 7 months
Contributions summary:Stephen primarily focused on adding methods to the `DataFrame` and `Series` classes within the `danfojs` repository. Their contributions included adding functionalities such as a dummy method to `frame.js` and adding the `.iloc` and `.loc` methods. The user's work also involved resolving merge conflicts and implementing methods like `drop`, `dropna`, `cumsum`, `cummin`, `cummax`, and `cumprod`, indicating a focus on data manipulation and aggregation.
datadanfojsintuitivetensorflowtensors
ckan/ckan
May 2021 - Oct 2021
CKAN is an open-source DMS (data management system) for powering data hubs and data portals. CKAN makes it easy to publish, share and use data. It powers catalog.data.gov, open.canada.ca/data, data.humdata.org among many other sites.
Role in this project:Back-end Developer
Back-end DeveloperContributions:1 review, 47 commits, 14 PRs in 4 months
Contributions summary:Stephen's contributions focused on removing Python 2 specific code and modernizing the codebase. They removed conditional statements and py2 specific code from multiple files, impacting the core functionality of the CKAN application. This includes changes to core files like `ckan/common.py`, `ckan/lib/helpers.py`, and other config files, ensuring the project's compatibility with Python 3. Further contributions demonstrate code refactoring by removing redundancies and updating code to align with modern pythonic standards.
portalspythondatadata-catalogdbpedia
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