Servicetitan Software Engineer Interview Guide

We’ve seen a very consistent pattern at ServiceTitan: the company seems to care less about flashy algorithms and more about whether candidates can implement clean, stack-specific code under pressure. Multiple candidates reported custom dictionary, generic collection, and interface-extension problems in C#, often with follow-on questions about data structure choice, complexity, and even memory behavior. That tells us the bar is practical and opinionated — they want engineers who are comfortable living close to the framework, not just solving puzzles in the abstract.

A recurring theme is that the interviewers often probe speed and completeness at the same time. Several candidates said the work felt manageable in difficulty, but the real filter was finishing quickly enough, especially when the prompt expanded into concurrency, async/await, or recursive downloading/parsing. We also saw repeated requests to explain how async works, how to validate concurrency, and how to test code when the tooling is limited or the environment is awkward. That combination suggests they value engineers who can move fast and defend their implementation choices clearly.

One non-obvious signal: the process can feel rigid, tool-driven, and sometimes under-communicated, so candidates who rely on a lot of back-and-forth may feel squeezed. Our candidates report that the strongest performances came from people who could stay calm, keep the code moving, and make their tradeoffs explicit without waiting for much interviewer guidance. In other words, ServiceTitan appears to reward engineers who are fluent in C#, comfortable with concurrency, and able to prove their code works even when the interview setup is imperfect.