Code Arena
Level 1
0 / 500 XP
Skill path
M
T
W
T
F
S
S
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1
Rookie RookieVariables, lists, comprehensions+0 XP
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2
Apprentice ApprenticeDicts, classes, decorators+500 XP
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3
Engineer Engineerasyncio, typing, packaging+1300 XP
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4
Senior SeniorDesign patterns, performance+2500 XP
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5
Architect ArchitectDistributed systems, FastAPI+4100 XP
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6
Legend LegendContribute a challenge+6100 XP
Challenge types
Speed run
Solve in under 5 min. Fastest time wins.
Debug it
Find & fix the bug. Hidden traps.
Optimize
Beat the benchmark. Perf is the score.
Architect
Design a system. Community votes.
Refactor
Make the mess clean. Rules apply.
Pair up
Solve with a partner. Random match.
Open challenges
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Easy Rookie SpeedRun
Python: Sum of Squares Comprehension
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Medium Apprentice SpeedRun
Python: dict.pop With Defaults
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Medium Apprentice SpeedRun
Python: `is` vs `==` and the 256 Cache
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Medium Engineer SpeedRun
Python: Late-Binding Closures in a Loop
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Hard Engineer SpeedRun
Python: The Mutable Default Trap
Badges earned
First blood
Bug slayer
Speed demon
Refactor king
Async wizard
LINQ master
Architect
Legend
Consistent