Its great to know youre interested in the IT/Software/Analytics Service Sector. What I would suggest you is after B.Sc. in Mathematical Sciences, you must pursue MCA from some of the Best NITs or Top Public or Private Universities having strong Placement Prospects. Especially the NITs, you need to ace the NIMCET Examination followed by securing Admission in MCA, and hence a strong career in the IT/Software/Services Industry.

Other Option could be pursuing a M.Sc./MS in Quantitative Economics, Mathematics & Statistics or Computational Sciences from Eminent Institutes like ISI Kolkata and its branches like ISI Delhi. ISI Kolkata and New Delhi, really have Good Placements. And after M.Sc. or after some years of Work experience post M.Sc., if seriously interested, you may even pursue M.Tech in CS/Mathematics & Computing/ Data Science from some of the Top Institutes in India.