B2C marketplace e-commerce project - cryptocurrency payment system (debugging and modification work)

B2C marketplace e-commerce project - cryptocurrency payment system (debugging and modification work) - Program structure based on Laravel Framework; - Paymentsystem based on BTC, LTC and XMR (integration via own developed interfaces - Bitcoin- and Litecoincore as well as Monero Node are already installed on the test server). NO use of third party coin-Api's like Coinbase, Coinomi etc! Tasks: - Debugging and modification of the implemented payment system for BTC and LTC; integration of a PHP based QR-code generator for the deterministic wallet addresses for BTC, LTC and XMR); - Modification and redesign of an integrated forum (multiple categories, open and restricted user groups, predefined HTML and css design); - Modification and redesign of an integrated messaging system (NO external function - only DB embedding); - Integration of a dispute function (buyer / seller / support moderator); - Modification of the existing rankingsystem for sellers and buyers; - Modification of the review function for sellers and buyer - link to the ranking system; - Bugfix and script modification; - Modification of the admin panel (integration of new functions, restoration of existing functions); - Complete removal of all javascript elements, Google Api's etc; - Cleanup and removal of useless scripts from the Laravel structure; - Cleanup of the DB. Requirements: - Very good knowledge of Laravel, PHP, MySQL, javascript, HTML and css; - Very good knowledge of the implementation of payment systems based on cryptocurrencies by using of own interfaces and Api's - good knowledge of blockchain technology (NOT talking about the embeding of Api's from third-party Api's providers such as Coinbase, Coinomi etc.); - Adherence to the agreed time frame; ATTENTION! IMPORTANT! PLEASE READ CAREFULLY!!! - Compliance with the given financial budget (please NO offers based on hourly rates - I only accept offers with GUARANTEED fixed prices!). Communication and confidentiality: - Communication and data exchange exclusively via the Messenger Telegram (MANDATORY REQUIREMENT!); - Processing of all scripts exclusively on the development server (NO processing on your localhost!!!); - Daily documentation of your work performance! Transparency and traceability of your work is absolutely mandatory! - Good accessibility and communication skills (good English - spoken and written - is also mandatory!). Payments: All payments will take place exclusively via freelancer.com! ATTENTION! IMPORTANT! PLEASE READ CAREFULLY!!! When placing the order to you, I will release an advance payment as the first milestone (20% of total). After COMPLETION of the project, another milestone of 50% of the total amount will be released. The remaining 30% of the total amount will be released after your work has been finally checked and the result is for 100% satisfactory. Further information: Further information (url) and access to the development server on request!