Explained the project I did not expect questions to be this level, which i think good for 5 years of experience guys. Solid principles, I am way passed solid principles in my career. This question is what i ask 2-4 years of developers. I donot much remember them. UI Design- My expertise in understanding client requirements, evolve them into the project and guide teams to delivery, Mentoring, Training, technical solutions, pocs, product evaluations. SIngle page design is to low level for me now, but i have passed to long back.