From Bengaluru to Hyderabad, Indian engineers, data scientists, and strategists are building the tech infrastructure that powers billion-dollar ad campaigns for brands like Target. What started as cost-saving outsourcing has evolved into full-scale offshore HQs where decisions on media spend, audience targeting, and campaign performance are made; often before the client even sees the pitch. The lines between advertising and engineering have blurred; AI, programmatic bidding, and real-time optimisation are now built and run from India. Agencies may still carry the brand name, but the engine driving them? That’s Indian-made.