I applied online. The process took 2 weeks. I interviewed at Heartflow (San Francisco, CA)
Interview
The interview process takes 4 stages. In the first interview, they explained the position, the main product of the company (the core is image processing) and went through resume asking questions regarding some of the activities listed.
The second interview is a technical interview were they asked questions about C++, basically going through a code review and assessing performance, time complexity and how to improve the code. The code included some OpenMP routines, and some questions were very specific like what kind of error is generated if something changes. Discuss about edge cases. Data structures in use. The underlying data structure of C++ STL containers and estimations of runtime of operations on them.
Third round is focused on python, testing and validation and the fourth round a meeting with the team to have an open discussion about projects and experience.
Questions require fundamental understanding of C++ and compiler behavior, questions may be tricky so make sure to tackle the questions in many different ways to showcase your knowledge of the language and good practices.
Interview questions [1]
Question 1
What's the underlying data structure of a set, a vector, an unordered_set?
What's the time complexity of the insertion of an element in a set?
What's the time complexity of a given C++ function?
What's the difference between a reference and a pointer?
Why would you return a value instead of storing the response in a given reference taken as an argument?
What's size_t?
What would happen if you subtract from a size_t an over-sized element?
What would happen if you try to access an element from a vector that exceeds its size?
What's a race condition? Does it only happen when writing to memory?
I applied online. The process took 2 weeks. I interviewed at Heartflow
Interview
Overall 7 rounds, minus the recruiter screening. Rounds included:
Hiring manager meeting
2 technical rounds
Meeting with reps from other teams
Prepare a presentation for the full team
Meet with director
Interview questions [1]
Question 1
When was a time you had a conflict with a coworker and how did you resolve it?
Interview process is very good. Recruiter is very responsive. Very good interactive phone screening followed by technical interview using zoom. Interviewer is very polite, explained about the team and product.Questions are on Memory Management, Garbage collection, Recursion, cloud computing
