Projects - Rust Smart Contracts, Trading Infra & Web3 Casino Engines

A selection of production systems I've built as a Rust smart contract and backend developer: prediction market bots, Solana / EVM trading infrastructure, MEV and arbitrage systems, and provably fair Web3 casino game engines.

Poocoin Multi Chart - case study by Roswelly, Rust smart contract & backend developer

Poocoin Multi Chart

PooCoin is a defi analytics and tracking platform focused on real-time market data for tokens and multi-chain ecosystem like Polygon and KuChain. live real time chart, portfolio & wallet tracking,token analytics and insights, dex swap integration, risk & scam detection.

BNB
Web3.js
Socket.io
Zustand
Tanstack Query
Trading View
CaesarX - Advanced Solana Trading Platform - case study by Roswelly, Rust smart contract & backend developer

CaesarX - Advanced Solana Trading Platform

Solana trading platform featuring real-time token analytics, automated trading tools, token scanner and portfolio tracker, token deployer, reward system, multi wallet management.

React+Vite
Web3.js
Socket.io
Zustand
Tanstack Query
Lightweight Charts
Solana Lottery Game - case study by Roswelly, Rust smart contract & backend developer

Solana Lottery Game

Built smart contract for lottery game and backend and frontend integration. implemented NFT mint and rewards for users who only followed the official twitter by using rapid api. Made ticket purchase system which user buys 6 of ticket number, discord bot service.

Rust
Anchor
web3.js
React
Typescript
MongoDB
Revshare-DeFi/Tokenomics/Launchpad - case study by Roswelly, Rust smart contract & backend developer

Revshare-DeFi/Tokenomics/Launchpad

Users create tokens with built-in revenue-sharing capabilities. Using Token-2022 standard, RevShare tokens automatically collect transfer fees from every transaction and distribute them proportionally to all token holders

Rust
Anchor
web3.js
Token-2022
Node.js
REST/GraphQL
AI Agent - case study by Roswelly, Rust smart contract & backend developer

AI Agent

Autonomous AI agent serves as a decentralized infrastructure for financial applications, focusing on scalable, secure ledgers for multi-asset management, DeFi lending/borrowing, and cross-chain capabilities. Th AI agent enables goal-oriented automation, such as on-chain transactions, smart contract interactions.

Next.js
Nest.js
MongoDB
Send Agent kit
Privy
Tunekey
Polymarket Trading Bot - case study by Roswelly, Rust smart contract & backend developer

Polymarket Trading Bot

Polymarket trading bot for Polymarket prediction markets on Polygon. This bot provides both interactive and automated trading capabilities with comprehensive market analysis, order management, and risk controls

Solidity
web3.js
Typescript
MongoDB
Redis
Node.js
Solana Trojan Bot forked - case study by Roswelly, Rust smart contract & backend developer

Solana Trojan Bot forked

Forked Solana Trojan bot with copy trading and sniper features on pumpfun and bonkfun, raydium. Implemented manual buy /sell on pumpfun. Ensuring in the same block and capturing new token mint By using Jito shredstream and Helius RPC and Jupiter aggregator v6. wallet keypair generation securely

Rust
Anchor
web3.js
React
Typescript
MongoDB
Web3 Casino Games - case study by Roswelly, Rust smart contract & backend developer

Web3 Casino Games

Built smart contracts and dapps for web3 casino games. Implemented casino logic(bets, payouts, jackpots) on-chain and ensuring fairness with provably fair algorithms. Handled deposits, withdrawals, and staking. Integrated NFTs for in-game assets, VIP access, or player rewards.

Rust
Solidity
web3.js
React
Next.js
Typescript
Pumpfun Forked - case study by Roswelly, Rust smart contract & backend developer

Pumpfun Forked

Built bonding curve smart contract with customization features and made backend. Token creation & bonding ucrve sale, LIquidity migration to a DEX, Auto pool creation with predefined liquidity and lock period, Fee & treasury logic.

Rust
Anchor
web3.js
React
Typescript
MongoDB
Polygon Casino Games - case study by Roswelly, Rust smart contract & backend developer

Polygon Casino Games

Built base smart contract for Coiflip, Dice, Roulette, Crash and random outcomes are generated usingi Chainlink VRF. Integrated price oracles to convert non-native token profits to native token shares for reward.

Solidity
ethers.js
React
Typescript
MongoDB
TailwindCSS
Four.meme sniper | migration sniper bot  - case study by Roswelly, Rust smart contract & backend developer

Four.meme sniper | migration sniper bot

After detecting new tokne mint and check whitelist and buy and sell the token in the same block including rug and risk detection. While detecting new token is migrated from four.meme to PancakeSwap, snipes migrated token.

BNB
Solidity
Web3j.s
Node.js
Typescript
Express
Solana Arbitrage Bot - case study by Roswelly, Rust smart contract & backend developer

Solana Arbitrage Bot

Solana Arbitrage Bot with Jupiter AggregatorIntegration A high-performance, real-time arbitrage bot for Solana that identifies and executes profitable price differences across multiple DEXs using Jupiter Aggregator v6, gRPC streaming, Jito bundles, and advanced MEV strategies.

Solana
Rust
Anchor
Jupiter Aggregator
Jito shredstream
Helius gRPC
PumpSwap Migration Sniper Bot - case study by Roswelly, Rust smart contract & backend developer

PumpSwap Migration Sniper Bot

Solana Migration Sniper Bot can sniper tokens from PumpSwap to Raydium CPMM within the same transaction bundle as the liquidity add to gain a speed advantage over manual traders.

Solana
Rust
Anchor
Jito shredstream
Helius gRPC
Nozomi
Avalanche Pharaoh Volume Bot - case study by Roswelly, Rust smart contract & backend developer

Avalanche Pharaoh Volume Bot

Avalanche Pharaoh Volume Bot is a bot that tracks the volume of the token and buys the token with bubblempa detectoin prevention.

Avalanche
Solidity
ethers.js
3D NFT Staking and Referral System - case study by Roswelly, Rust smart contract & backend developer

3D NFT Staking and Referral System

Micropets is 3D NFT staking and referrral system built on BNB Chain. Allows users to stake their NFTs and earn rewards. Users can also share erfer link with friends then friend must purchase and stake them

BNB
Solidity
React
Node.js
Express
Typescript
Monstro.fun - case study by Roswelly, Rust smart contract & backend developer

Monstro.fun

Monstro.fun is a gamified DeFi platform built around tokenized characters, staking pools, and referral-driven yield mechanics. My focus was on delivering the core technical architecture - ensuring smooth integration between smart contracts, backend services, and the front-end dashboard

BNB
Solidity
React
Node.js
Express
Typescript
Templar finance - case study by Roswelly, Rust smart contract & backend developer

Templar finance

Templar Finance is a decentralized reserve-currencye protocol built on BNB chain. It aims to establish a self-sustaining tresury system that supports the intrinsic value of it's native token. It manages its own liquidity and backing assets through a staking, bonding, and treasury management.

BNB
Solidity
React
Node.js
Express
Typescript
Pet Services Marketplace Platform - case study by Roswelly, Rust smart contract & backend developer

Pet Services Marketplace Platform

MadPaws is an pet services marketplace connecting pet owners with trusted sitters, walkers, and groomers. The platform handles user onboarding, service listings, bookings, payments, and review workflows with strong reliability and scalability requirements.

Next.js
Node.js
Express
PostgreSQL
AWS
Redis
Contiki Travel Booking Platform - case study by Roswelly, Rust smart contract & backend developer

Contiki Travel Booking Platform

Contiki is a full-featured travel booking and community platform that allows users to discover, customize, and book curated travel experiences across the world. It emphasizes group experiences, trip planning, and real-time booking mnanagement.

Next.js
Typescript
TailwindCSS
Node.js
Express
StripeAPI
Vacasa Vacation Rental Booking platform - case study by Roswelly, Rust smart contract & backend developer

Vacasa Vacation Rental Booking platform

Vacasa provides an end-to-end vacation rental solution where homeowners can list properties, guests can book them, and Vacasa handles evrything from cleaning to dynamic pricing.

Next.js
Typescript
TailwindCSS
React Query
Google Maps API
Node.js