Full Stack Dev for Car Auction E-commerce Site

I'm seeking a skilled full stack developer to create a user-friendly, responsive and secure e-commerce website that will facilitate the online auction of used cars, commercial vans and misc. tools and equipment. The website is aimed at the general public, so the design and functionality should cater to this target audience.

Key Features:
- E-commerce Functionality: The core feature of the site will be the ability for interested bidders to browse, select, and bid online on the listed items.
- User-friendly Interface: The site should be intuitive to navigate, with clear categories, search functionality, and a streamlined checkout process.
- Responsive Design: The site should be accessible and usable across multiple devices, including desktops, tablets, and smartphones.
- Social media support: the site should take advantage of the social media platforms to promote its auction listings to the local market. Specifically, facebook marketplace, instagram, tik-tok, youtube, google, email campaigns etc. These promotions should be as automated as possible.
- Integration with popular payment gateways: the site should be integrated payment systems. e.g. Paypal, Google Pay, Stripe.
- Basic SEO: Optimize product pages and homepage content (titles, meta tags, image ALT text).
- Responsive Optimization: Ensure that it works perfectly on mobile/desktop.

Required Skills & Experience:
- Full Stack Expertise: Proven experience building stores using Next.js + Node.js + Express + MongoDB (share your portfolio).
- Compliance Awareness: Understanding of car aution e-commerce rules.
- Design Skills: Ability to customize themes/templates (HTML/CSS/TailwindCSS knowledge).
- Payment Integration: Experience setting up payment gateways within platforms.
- SEO: Knowledge of on-page optimization.