Full stack engineer with strong Postgres, Python and Javascript

Our team needs an experienced software engineer to help us improve our existing E-commerce shipment-optimization project (AWS, MongoDB) with potential conversion into a stricter and more structured Postgres-based environment The ideal freelancer will assist in development of new code to support integrations of new customers as well as in generalization and optimization of existing codebase with potential migration to structured Postgres environment. Your insights will play a key role in increasing our efficiency, reducing the customer integration time and making the code more manageable. Please share relevant work samples, a brief note on your interest in the project, and any initial thoughts or questions.