Integrate a payment gateway to existing full stack application

I've 7+ years of experience in Web Development/Web design, Mobile App Development(IOS/Android), Graphic design, Logo Design Business Cards & Stationery, Flyers & Brochures, Packaging Design, Web & Mobile Design, Social Media Design, Banner Ads, Photoshop Editing, Blogs, article writing, SEO, Social media marketing, Google Ads, Online Advertising, Google Adsense, Affiliate Marketing, Email Marketing, Mobile Marketing, Lead generation, online reputation management Skills - HTML, CSS, JavaScript, Bootstrap, Angular js, PHP, CI, Laravel, Shopify, Angular (All version, JS), Express js, backbone js, Node js, React native, Mongo DB, React js, node js, Python, Python scripting, Data scraping, Selenium testing, MySQL, PostgreSQL, SQLite, AWS(EC2, S3), Digital ocean droplet, Heroku, Gunicorn, Nginx, Apache, Django, DRF(Django Template, rest API, rest framework, unit test cases), Machine learning, Artificial intelligence, image processing, open cv, Deep learning, Sentimental analysis, Data science Magento , Android , Java, WordPress, Website Builders & CMS, Web Programming, E-commerce, Desktop applications, Support & IT, Chatbots, Data Analysis & Reports, Convert Files, Databases, User Testing, QA. I am very much interested in your job please invite me for further discussion and we will go ahead. Thank you...

Hi, I have a working experience in Nodejs and Mongodb. Also I have a 7 years experience in software industry. Relevant Skills and Experience Javascript, Nodejs, Mongodb is my experience

Having Worked with MERN for a long time, I think I am Experienced enough to complete this project. I am Hard working and would go to any extent to complete the task on time. Thank You.