Question: I need a company that can provide end-to-end development services for my e-commerce platform, including UI/UX design and QA testing.

If you're looking for a full-service end-to-end development partner for your e-commerce site, OpenXcell could be a good choice. The company offers a wide range of services including UI/UX design, QA testing and full development for web and mobile apps. With locations in the US, India, Romania and Ukraine, OpenXcell offers flexible engagement models and promises transparency, quality and rapid product delivery, making it a good choice for startups and established companies.

Another contender is Mendix, a low-code platform geared for fast development and deployment of mobile and web apps. Mendix uses AI to speed up development and offers a visual IDE, one-click cloud deployment and strong security. It's a good choice for retail and other businesses that need to develop applications quickly and at large scale.

If you prefer a headless approach, Headless Commerce is a solution that brings commerce to touchpoints like social media and B2B buyer portals. It's geared for front-end flexibility and API-powered shopping, with strong security and scalable APIs, and is a good choice for businesses that want to expand their e-commerce reach without a hitch.

Last, Crownpeak offers an AI-powered Digital Experience Platform designed to boost content and commerce experiences. With hybrid headless content management and AI-powered commerce search, it can help you create personalized digital experiences at large scale. It's a good fit for large-scale retail and commerce companies that want to improve customer engagement and digital experience.