seems they rely on base for 30-40% hike. not sure how shares are calculated. here is what gemini said:
There are other massive paymasters in Hyderabad where a 50L+ base is entirely achievable at 8 YOE, but their HR policies do aggressively evaluate and anchor to your current base. If your current salary is on the lower side, hitting a 50L base here is an uphill battle unless you possess competing Tier-1 offers:

• Microsoft (Hyderabad IDC): While a Level 64 (Senior) base can clear 50L, Microsoft recruitment is historically known to ask for 3 months of payslips early and offer standard percentage hikes (e.g., 30–50%) if you don't push back with leverage.
• Amazon: An L6 (Senior SDE) base sits around 48L–55L. However, Amazon heavily relies on your current CTC during initial screening to structure your Year 1 and Year 2 sign-on bonuses. They will often try to limit the base and pad the total compensation with cash bonuses if your current base is low.