Process
I had an on-campus interview where I had to pair program with an engineer. I had to design an LRU cache that had no constraints on time complexity. I implemented a class that worked perfectly, but I got a rejection three days later.
Questions
LRU cache problem that supports get and set operations.
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Interview Statistics
The following metrics were computed from 158 interview experiences for the Block Software Engineer role in United States.
Success Rate
18%
Pass Rate
Block's interview process for their Software Engineer roles in the United States is very selective, failing most engineers who go through it.
Experience Rating
Positive49%
Neutral25%
Negative26%
Candidates reported having good feelings for Block's Software Engineer interview process in United States.
Block Work Experiences
2.0
The company has seriously declined over the past two years
Software Engineer • Former Employee
San Francisco, California, United States
September 2, 2025
Pros: Good WLB.
Interesting problems being solved day-to-day.
Cons: Low pay.
Constant reorgs that make it impossible to plan work long-term.
Lack of clear company direction, constantly playing catch-up with rivals like Toast in the food & beverage space.
Lack of synergy between Square and Cash.
Poorly planned migration projects that constantly distract from real product work.
Disappointing career growth, especially in the last 2 years due to all of the above.
Lack of office culture lowers already low morale.
4.0
Mostly good
Software Engineer • Former Employee
Sydney
March 29, 2026
Pros: - High standards
- Talented colleagues
- Big data and large scale
- Challenging problems
- Purposeful work
Cons: - Lack of alignment across teams.
- Timezone differences.
- Engineering culture at a low.
3.0
Good comp, bad evals
Software Engineer • Former Employee
Toronto, ON
April 16, 2026
Pros: Good pay and a good work-life balance.
Cons: The company moved way too hard to pure metrics, such as PR count, and they were constantly changing direction.
- 2.0The company has seriously declined over the past two yearsSoftware Engineer • Former EmployeeSan Francisco, California, United StatesSeptember 2, 2025Pros: Good WLB. Interesting problems being solved day-to-day.Cons: Low pay. Constant reorgs that make it impossible to plan work long-term. Lack of clear company direction, constantly playing catch-up with rivals like Toast in the food & beverage space. Lack of synergy between Square and Cash. Poorly planned migration projects that constantly distract from real product work. Disappointing career growth, especially in the last 2 years due to all of the above. Lack of office culture lowers already low morale.
- 4.0Mostly goodSoftware Engineer • Former EmployeeSydneyMarch 29, 2026Pros: - High standards - Talented colleagues - Big data and large scale - Challenging problems - Purposeful workCons: - Lack of alignment across teams. - Timezone differences. - Engineering culture at a low.
- 3.0Good comp, bad evalsSoftware Engineer • Former EmployeeToronto, ONApril 16, 2026Pros: Good pay and a good work-life balance.Cons: The company moved way too hard to pure metrics, such as PR count, and they were constantly changing direction.
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