Senior Software Engineer Interview Experience - London, England
Process
Phone call with the recruiter, then received a 1-month code challenge to develop a caching library through HackerRank.
You receive a very vague description of the exercise, and they're expecting you to ask questions. Not asking questions can get you disqualified on its own.
Don't try to sound too smart in questions or in your solution by implementing more than what's asked. Depending on who's interviewing you, this can be a big factor against you.
Questions
Implement an n-way set associative cache with support for LRU and MRU in C#, Java, or Python.
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Interview Statistics
The following metrics were computed from 1 interview experience for the The Trade Desk Senior Software Engineer role in London, England.
Success Rate
The Trade Desk's interview process for their Senior Software Engineer roles in London, England is extremely selective, failing the vast majority of engineers.
Experience Rating
Candidates reported having very negative feelings for The Trade Desk's Senior Software Engineer interview process in London, England.
The Trade Desk Work Experiences
- 4.0Good environment, needs more tech focusSenior Software Engineer • Current EmployeeLondon, England, United KingdomOctober 21, 2025Pros: Snacks, food, environment. Work can be very interesting.Cons: No CTO. Not an engineering powerhouse, though it does have talent that is underutilized. Stock isn't very strong, with a high P/E.
- 4.0Great culture and workSenior Software Engineer • Current EmployeeLondon, England, United KingdomMarch 11, 2024Pros: Work is interesting. Business leadership is strong.Cons: Technical leadership is weak. Spending needs to be balanced (too much in some areas, too little in others).
- 4.0Good culture and tech, but not very diverseSenior Software Engineer • Current EmployeeLondon, England, United KingdomFebruary 10, 2022Pros: Good culture, and they take care of employees with good benefits.Cons: Lack of diversity in the engineering team, and no initiatives to improve it.
The Trade Desk Interview Questions
