We’re inviting developers from the Solana community to take part in our “Rebuild Backend Systems as On-Chain Rust Programs” Challenge<h3 class="heading-node">Your Task 🛠️</h3>Take a traditional backend system and rebuild its core logic as a Solana program written in Rust.The goal is to reframe Solana as a distributed state-machine backend - not just a crypto tool - and demonstrate how familiar Web2 backend patterns can be redesigned using on-chain architecture. This challenge aims to help onboard traditional developers by showing practical backend use cases built on Solana.<h3 class="heading-node">Task Description 💻</h3>Choose ONE backend pattern and implement its core logic as a Solana program.Example systems include (but are not limited to):<ul class="list-node"><li>Escrow engine</li><li>Subscription billing system</li><li>Order matching engine (simplified)</li><li>Access control / RBAC system</li><li>Rate limiter system</li><li>On-chain job queue</li><li>API key management system</li><li>Leaderboard / ranking engine</li><li>Auction engine</li></ul><h3 class="heading-node">Scope Detail ⚙️</h3>Architecture design - translate a traditional backend pattern into Solana’s account model Program development - implement logic using Rust (Anchor or native SDK) System thinking - demonstrate how state, permissions, and execution differ from Web2 backends Practical usability - make the system testable and understandable for other developers<h3 class="heading-node">Mandatory Requirements 📩</h3><ul class="list-node"><li>Rust (Anchor or native SDK)&nbsp;</li><li>On-chain program deployed to Devnet&nbsp;</li><li>Public GitHub repo</li><li>Architecture explanation included in README:<ul class="list-node"><li>How this works in Web2</li><li>How this works on Solana</li><li>Tradeoffs &amp; constraints</li></ul></li><li>Devnet transaction links</li><li>Testable publicly deployed/shared basic client (minimal frontend or CLI)&nbsp;</li></ul>Judging Criteria weight 🏆Submissions will be evaluated based on:Architecture &amp; account modeling 30%&nbsp;Code quality &amp; Rust patterns 25%&nbsp;Correctness &amp; testing 20%&nbsp;Web2 → Solana design analysis 15%&nbsp;UX / client usability 10%&nbsp;<h2 class="heading-node">Rewards 💰</h2>1st Place: 700 USDC2nd Place: 200 USDC3rd Place: 100 USDC

Rebuild production backend systems as on-chain Rust programs

Rebuild production backend systems as on-chain Rust programs

1,000USDC Total Prizes
700 USDC 1st 200 USDC 2nd 100 USDC 3rd