- How do they take a business problem and model it into code - How do they debug their own code - Is their code easy to read - Do they name their variables/fields/methods/classes in easy to understand and consistent ways or are the names confusing or inaccurate - How do they take constructive criticism - How collaborative are they - Do they think about the problem first or do they just start hacking away - When asked to add a feature to existing code, do they start hacking or do they write out a test describing the new functionality first - When confronted with vague requirements, how well do they ask questions to get the information they need - How much experience do they have with algorithms, database design, systems design, building things so they scale well