Fetch product details from amazon shop via Java API

You are a intermediate or senior Java developer? You know how to integrate amazon shop API? You know how to fetch by a set of given ASINs (ex-OR) a set of given EANs following product attributes: main attributes: - product title - product brief description - product long description - the product images - product ASIN - product model number - product average rating additional attributes: - product size - product weight - product weight incl. packaging - product listing first date - product parent ASIN - product best-seller-ranks and the corresponding categories - the best price - the best price winner/seller name - the best price seller link - the vendor name and link competitor attributes: - if buybox is shown, the winner of the buy-box - all alternative sellers and the seller name and links - all alternative seller offers (prices) !!!!!! IMPORTANT !!!!!! We need only simple java-code in packages and classes, which you call from a JUnit-Testcase. So no UI or any other user-Input is needed. Simply a JUnit-Class which calls your implemented code with sets of ASINs or sets of EANs. We need to be able to fetch from [login to view URL], [login to view URL], [login to view URL] Mandatory libs - amazon API lib - junit Restricted libs - any Spring lib Payments Our payment plan are fixed to the delivery of this milestones: #1 (5% payment) - provide us a full model-classes incl. their attributes as java-fields and the relations in form of collections in Java-code for the requested data above #2 (10% payment) - fetching of the main attributes is implemented and can be called easily via JUnit with a given set of ASINs - for your testing, please use this sample ASINs DE: B074JHB7BB, B078KDPNVF, B002BREPEM #3 (15% payment) - fetching the additional attributes #4 (30% payment) - fetching the competitor attributes #5 (40% payment) - after fixing all coding issues and bugs & passing our internal tests (about 10 workdays/2 calendar weeks) #6 (20% bonus) - if you deliver in time (less than 5 calendar days) and in quality (10% delivered milestones in time and 10% delivered in quality, means without any issues, which are easily to find with simple tests and code reviews). If you exeed the timeframe above the double amount also the quality bonus goes to 0% Your delivered artifacts have to be: - the full source code with JDK8 features (e.g. preferably annotations) - the used libs (preferably in maven/[login to view URL]) - a delivery of all sources has to be done in our a selfhosted gitlab (git repository and issue tracking). We will share the access after we award you the project - all features of JavaSE and JavaEE standards are allowed - preferably already solved problems like in apache commons is strongly recommended - additional libs need to be mentioned prior usage to avoid licensing issue - your code will pass standard checks in findbugs, checkstyle and PMD Runtime Your delivered artifacts will run with/in: - oracle jdk8 version 111 or newer - Maven 3.2 - Eclipse Oxygen with 5 mandatory plugins shared in the repo README (we do not test on Netbeans nor Idea IntelliJ!) Budgets and rates Place your offer independently of our budget offer. We do not disclose our budget nor do we disclose our rates which we are willing to pay. Please note we do not discuss about budgets. We talk about the time you need and the payment you get for this time and knowledge. So share us the costs you will have in your proposal and we will respond if the offer is reasonable. (We have developers aboard with more than 20y of Java experience, so we are able to see reasonable offers...)