--- title: "Aderayo Olamide Adelanwa (@deraintech) | Hashnode" description: "Technical Research & Systems | Backend Engineering • Data Systems • AI Applications • Building in Public" url: "https://hashnode.com/@deraintech" --- @deraintech # Aderayo Olamide Adelanwa @deraintech · Lagos, Nigeria · Joined September 2026 Technical Research & Systems | Backend Engineering • Data Systems • AI Applications • Building in Public ### [How I Refactored a Streamlit Prototype into a Modular Python Application](https://aderayodevnotes13.hashnode.dev/how-i-refactored-a-streamlit-prototype-into-a-modular-python-application?utm_source=hashnode&utm_medium=feed) What building a real project taught me about separation of concerns, testable business logic, and designing a prototype for what comes next. 7 min read · [aderayodevnotes13.hashnode.dev](https://aderayodevnotes13.hashnode.dev/how-i-refactored-a-streamlit-prototype-into-a-modular-python-application?utm_source=hashnode&utm_medium=feed) [2](https://hashnode.com/posts/how-i-refactored-a-streamlit-prototype-into-a-modular-python-application/6aa278beb6c8152e34da1025) [Sep 10](https://hashnode.com/posts/how-i-refactored-a-streamlit-prototype-into-a-modular-python-application/6aa278beb6c8152e34da1025) ### [Building a CRUD API with FastAPI](https://aderayodevnotes13.hashnode.dev/building-a-crud-api-with-fastapi?utm_source=hashnode&utm_medium=feed) From an In-Memory Prototype to a Working Backend 11 min read · [aderayodevnotes13.hashnode.dev](https://aderayodevnotes13.hashnode.dev/building-a-crud-api-with-fastapi?utm_source=hashnode&utm_medium=feed) [Sep 10](https://hashnode.com/posts/building-a-crud-api-with-fastapi/6aa492e24b0950f3cc43264e) ### [Starting a Second Career in Backend Engineering](https://aderayodevnotes13.hashnode.dev/starting-a-second-career-in-backend-engineering?utm_source=hashnode&utm_medium=feed) What 8 Months of Learning and Building Taught Me 5 min read · [aderayodevnotes13.hashnode.dev](https://aderayodevnotes13.hashnode.dev/starting-a-second-career-in-backend-engineering?utm_source=hashnode&utm_medium=feed) [Sep 9](https://hashnode.com/posts/starting-a-second-career-in-backend-engineering/6aa1eab09720aa8d96ed7c99)