Software Engineer Interview Experience - Waterloo, Ontario
Process
Hour-long "pair programming" sessions with Square developers. They give you a simple programming task, and you implement it in the language of your choice.
"Pair" because some of them will sit with you and point out typos, let you bounce ideas, and be helpful, while some will work on other things and hardly pay attention.
Questions
Find shortest uniquely identifying prefixes on a set of words.
For example, for the words "pineapple", "pinetree", and "pill", the shortest uniquely identifying prefixes are "pinea", "pinet", and "pil".
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Interview Statistics
The following metrics were computed from 3 interview experiences for the Block Software Engineer role in Waterloo, Ontario.
Success Rate
Block's interview process for their Software Engineer roles in Waterloo, Ontario is extremely selective, failing the vast majority of engineers.
Experience Rating
Candidates reported having very good feelings for Block's Software Engineer interview process in Waterloo, Ontario.
Block Work Experiences
- 5.0Amazing place to workSoftware Engineer • Current EmployeeWaterloo, Ontario, CanadaAugust 14, 2023Pros: Great overall. Great career development.Cons: None at all. Really great organization.
- 4.0Good Vibe, Boring ProjectsSoftware Engineer • Current EmployeeVancouver, British Columbia, CanadaNovember 7, 2025Pros: Good work-life balance, culture, people, and less politics.Cons: No interesting project, low stock price.
- 5.0SWE Intern ExperienceSoftware Engineer • Former EmployeeNew York, New York, United StatesNovember 3, 2025Pros: Great culture. Fun and demanding projects.Cons: The pay is not as competitive compared to elsewhere.
Block Interview Questions
