Salary expectation at a UK based startup

I am a software engineer at MathWorks India (1.5 YOE). This is my first full-time job right after college. My current CTC is around INR 20,00,000 per annum (the median pay for fresh college graduates in India). The median package at MathWorks USA for similar years of experience is $110K according to blind itself. I recently interviewed for a UK-based startup. I did pretty well in the technical interviews. This startup is very well funded by prominent VCs and investors. I will be their first engineering hire. The position is for backend engineering. I have my HR interview round soon and I don't have an idea about their pay range. They would require me to move to the UK (London) in the future. However, in the beginning, it will be a remote job (from India). Recently, I interviewed for a software engineering role at Oracle India too. I got an offer of around INR 40,00,000 per annum (CTC). I turned it down because I wasn't interested in the position, although it was a 100% salary hike. These are my questions: 1. What would be an appropriate expectation from me for the salary range? 2. How should I be navigating the discussions related to salary? 3. Should I use my Oracle offer details in my HR interview for negotiation, in case they take my current CTC (INR 20 LPA) as the reference point? #salary #startup #swe #UK #USA #hr #MathWorks #Oracle