As a seasoned full-stack engineer with rich experience in AWS, MongoDB, and Node.js, I'm confident in my ability to not just meet, but exceed your project requirements. I have honed my skills in web application development for more than half a decade now and am at ease with modern front-end and back-end technologies. This includes AngularJS, JavaScript, Node.js, and NoSQL(MongoDB) which are prominently sought-after skills for your project.
The task of linking the frontend and backend of your application presents an exciting opportunity for me to leverage my adept understanding of AWS. I not only have experience hosting on AWS but also optimizing it to suit my client's needs - this includes moving hosting accounts to the free tier within AWS. Furthermore, my skillset includes enabling download to Microsoft Excel and importing users - a perfect match for the two features you're looking to add.
Given your inclination toward AWS expertise with MongoDB and Node.js prowess, I believe I tick all the right boxes. My proficiency with various tools like Docker, Kubernetes, Git along with other programming languages would also come in handy while working on your project. I'm highly adaptable; ready for full-time or part-time employment as you may need. So let's team up! I'm eager to get started and deliver excellent results for you. Thank you!