roksolana_shendiukh
Savant
Top 0.7%
Member Nº 2444
Joined Jun 2026
SQL
Correlated Subquery
Window Deduplication
Common Table Expressions
Python
Recursion
Dunder Methods
Splitting & Joining
Spark
Outer Joins
Null Defaulting
Salting Strategy
Data Modeling
Event Sourcing
Immutable Logs
Grain Definition
Pipeline Architecture
Table Formats
Late-Arriving Data
Lambda Architecture
Solved
Python33
SQL30
Spark2
Data Modeling1
Pipeline Architecture1
Milestones
Top 100
Top 3% Python
Top 4% SQL
10 Hire verdicts
50 solved
30 active days
1,033 runs in the past 26 weeksActive days: 41 · Max streak: 18
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Recent solves
The Small Side Is the Way Out
Spark · easy · lesson
What Travels Light
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Eight Megabytes
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Revenue per category, lookup broadcast
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The Catalog That Fits in Memory
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The Catalog and the Crowd
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The Small Side You Send Everywhere
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The Small Side Is Your Way Out
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Small Enough to Travel
Spark · easy · lesson
Small Enough to Carry
Spark · medium · lesson