--- title: "ogunniran siji (@OGsiji) | Hashnode" description: "I am a Machine Learning and Quant developer, Having worked around building Machine Learning projects and Optimizing returns" url: "https://hashnode.com/@OGsiji" --- @OGsiji # ogunniran siji @OGsiji · Joined September 2023 ### [Why Data Contract Validation Needs Better Developer Experience](https://ogsiji.hashnode.dev/why-data-contract-validation-needs-better-developer-experience?utm_source=hashnode&utm_medium=feed) The Missing Contract Layer in Modern Data Architectures (And How to Catch Issues Before They Leave Your Machine) 10 min read · [ogsiji.hashnode.dev](https://ogsiji.hashnode.dev/why-data-contract-validation-needs-better-developer-experience?utm_source=hashnode&utm_medium=feed) [Aug 11, 2025](https://hashnode.com/posts/why-data-contract-validation-needs-better-developer-experience/689a1a04a0fcb9421c4263f3) ### [Building and Hosting a DBT Project with GitHub Actions CI/CD for Free](https://ogsiji.hashnode.dev/building-and-hosting-a-dbt-project-with-github-actions-cicd-for-free?utm_source=hashnode&utm_medium=feed) Host your data pipeline projects easily 5 min read · [ogsiji.hashnode.dev](https://ogsiji.hashnode.dev/building-and-hosting-a-dbt-project-with-github-actions-cicd-for-free?utm_source=hashnode&utm_medium=feed) [Jul 2, 2024](https://hashnode.com/posts/building-and-hosting-a-dbt-project-with-github-actions-cicd-for-free/668345621b0080d39c851898) ### [Building a ChatGPT Chatbot on Django using OpenAI API](https://ogsiji.hashnode.dev/building-a-chatgpt-chatbot-on-django-using-openai-api?utm_source=hashnode&utm_medium=feed) Chatbots have become an integral part of modern web applications, enhancing user experiences across various domains. In this tutorial, we'll explore how to create a ChatGPT-powered chatbot using Django, a popular Python web framework, and the OpenAI ... 3 min read · [ogsiji.hashnode.dev](https://ogsiji.hashnode.dev/building-a-chatgpt-chatbot-on-django-using-openai-api?utm_source=hashnode&utm_medium=feed) [Sep 20, 2023](https://hashnode.com/posts/building-a-chatgpt-chatbot-on-django-using-openai-api/650b23bae7140240ee3eb3a9) ### [Part 1; Advanced Techniques: Harnessing the Full Power of Optuna for Model Preprocessing.](https://ogsiji.hashnode.dev/part-1-advanced-techniques-harnessing-the-full-power-of-optuna-for-model-preprocessing?utm_source=hashnode&utm_medium=feed) Optuna: Optimizing Your Machine Learning Models and Preprocessing Steps Machine learning models, while powerful, often require extensive tuning and preprocessing to achieve their maximum potential. This is where Optuna, a versatile Python library, st... 6 min read · [ogsiji.hashnode.dev](https://ogsiji.hashnode.dev/part-1-advanced-techniques-harnessing-the-full-power-of-optuna-for-model-preprocessing?utm_source=hashnode&utm_medium=feed) [Sep 20, 2023](https://hashnode.com/posts/part-1-advanced-techniques-harnessing-the-full-power-of-optuna-for-model-preprocessing/650ab83eae165020471e3dd4)