PostgreSQL / Python developer for comparison website system improvement

We are a watch comparison website seeking a developer or team to enhance our system. We require a developer familiar with three primary technologies utilized in our comparison system: - Pipeline is developed in Python. - Database is developed in PostgreSQL. - Scraping bots are developed in NodeJS. About Our Website: We gather various second-hand products from numerous online stores, listing them on our site. This allows a broad audience to see which store offers the best price for a particular product. Problems: Problem #1: We source attributes and reference numbers from a primary website that acts like a product database. However, some online shops from which we gather data sometimes provide inaccurate attributes or reference numbers. For instance: Original data: Ref number #1111111 - material: stainless steel - retail price: $100 Web shop data: Ref number #1111111 - material: gold - retail price: $999 This discrepancy results in two seemingly different products under the same reference number on our site, causing confusion. We aim to introduce sub-models (e.g., #1111111-1 for stainless steel, #1111111-2 for gold). This process should be automated based on the attributes we get from anchor database with 100% relative data, with a well-defined hierarchy for prioritizing attributes (anchoring attributes that affects the price the most). Problem #2: Currently, manually deleting a single data entry from a database table disrupts the entire system, sometimes leading to inaccurate extreme prices because we can not delete a single data. The solution should allow us to remove a specific entry by its unique ID without affecting other tables. Additionally, we'd like a notification system that flags price anomalies (without putting them to the live version), ensuring manual review before they affect our charts. Problem #3: We intend to integrate several major online stores but lack the expertise for this expansion. Any developer or team with knowledge in API, NodeJS, and scraper creation would be invaluable. Requirements: The developer or team will be expected to sign agreements such as: Non-Disclosure Agreement (NDA) Non-Compete Agreement (NCA) And other relevant contracts. Only direct teams and developers should pitch us, we don't want to work with contractors or dropservicers. This is a big red flag for us and if we find out you are using them, by the termination contract you'll not be paid a single dollar. You need to use a CRM system and update us on which parts are you working. You will be paid in milestones which is the best way for both parties (you and us). We prefer to work with people from Europe due to the better time-zone, but we will not exclude other developers from other places, hiding under different nationalities will not help. Before signing a contract, we will have live video meeting just to ensure the compatibility. Slow internet speed and excuses you can not turn the camera are also red flag for us. Let your portfolio speaks for itself. Also a contract will be written on a $1M dollar damage even our project is maybe worth only a few thousand of dollars. If you are confident in yourself and your knowledge, this does not have to worry you at all. We are writing all that stuff because we worked with tons of developers on previous projects and we have seen everything. Also there is a simple workflow on how our system currently works.