DualDev
Real-time 1v1 coding live battles with an AI judge
DualDev launched on June 9, 2026 with 3 votes, #6,658 of 22,647 launches that month and more than 50% of that year's launches.
What it does
DualDev is a real-time 1v1 coding battle platform — two developers, same problem, live timer. What makes it different: → Opponent Silhouette — see your opponent's code structure masked as ▓▓▓ blocks. Spot if they're using a hashmap or brute force, without seeing their actual code. → AI Judge — evaluates both solutions at match end on correctness, efficiency, and code quality. → ELO matchmaking — rated queue with topic & difficulty filters, plus friend rooms.
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