T-Mobile·Full Stack Engineer

T-Mobile Full Stack Engineer interview experience

No offer

Medium

Positive

United StatesPosted Jul 2025 · Candidate report, summarized by Dataford

My interview started with a recruiter phone screen, and then things moved quickly into a technical-heavy loop.

I ended up with multiple rounds: a team-oriented call where there was a lot of coding, and then a final manager conversation that blended behavioral questions with a little technical follow-up.

In the technical portion, the questions leaned heavily on core software fundamentals. One round specifically covered Java fundamentals along with core libraries and concurrency, and the behavioral questions around that were formatted in a STAR style to evaluate teamwork, problem-solving, ownership, and communication from past projects. I also saw overlap with API-related topics in the overall

Create a free Dataford account to unlock the full round-by-round breakdown, the questions asked and the outcome.

Read the full report Read the full report

Preparing for this interview?

T-Mobile Full Stack Engineer interview guideThe full process, round by round, with the question bank Practice Full Stack Engineer interview questionsReal questions from this role across companies All T-Mobile interview guidesEvery role we cover at this company