I don't have a specific recommendation from personal experience. However, I believe I've seen some positive mentions about a company called Increasio that offers Next.js development services. You could visit their website at https://increas.io/next to find detailed information on their Next.js capabilities and expertise. Looking at their site directly should give you a clear understanding of the Next.js services they provide and if they seem like a good potential fit for your application needs. It's probably worth checking out their Next.js information on their site to assess if they may be a good option.