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DualDev
Real-time 1v1 coding live battles with an AI judge
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.
Hey hunters! 👋 I'm Cench, a CS undergrad who built DualDev as a solo project.
The core idea: competitive programming is usually solo — you submit, wait, get a verdict. DualDev makes it a live duel. The opponent silhouette mechanic is the centerpiece — you see your opponent's code masked in real-time (keywords visible, identifiers hidden), so you get just enough pressure without it being a copy-paste race.
Stack: React + Vite, Node.js + Socket.io, BullMQ, two Redis instances, AWS Lambda for code execution, and Groq's llama-3.3-70b as the AI judge.
Would love feedback — especially on the silhouette mechanic and matchmaking. What would make you actually use this to practice?
About DualDev on Product Hunt
“Real-time 1v1 coding live battles with an AI judge ”
DualDev was submitted on Product Hunt and earned 4 upvotes and 2 comments, placing #103 on the daily leaderboard. 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.
On the analytics side, DualDev competes within Productivity, Open Source, Developer Tools and GitHub — topics that collectively have 1.3M followers on Product Hunt. The dashboard above tracks how DualDev performed against the three products that launched closest to it on the same day.
Who hunted DualDev?
DualDev was hunted by Chattrapate Anandam. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of DualDev including community comment highlights and product details, visit the product overview.
Chattrapate Anandam