Full stack developers build both the interface and the services behind it, which makes them the default hire for startups and small product teams that cannot staff two specialists. In Pune the common stack is React with Node or Java on the backend, backed by a SQL or MongoDB database. The role's weakness is also its appeal: breadth is easy to claim and hard to prove, so interviews increasingly focus on one side in depth. Candidates who can show a deployed application they built and maintained convert at a much higher rate.