Base L2 · DeFi · MEV-protected execution
Cross-DEX Arbitrage System
A full arbitrage pipeline for Base L2: a scanner streams pool reserves from multiple decentralised exchanges, a pricing engine ranks spreads after gas and slippage, and an on-chain executor settles profitable routes atomically with flash-loaned capital.
- Year
- 2025
- Role
- Solo engineer - contracts, backend, dashboard
- Focus
- Solidity, Base L2, Node.js
Screenshots
Operator dashboard - live spreads, executions and win rate.
Problem
Price inefficiencies across DEXs vanish in milliseconds and are routinely front-run by MEV bots.
Solution
Built a scanning engine with an execution layer that atomically borrows via flash loans and settles arbitrage in a single MEV-protected transaction.
Result
End-to-end pipeline from opportunity detection to on-chain settlement, with a live dashboard visualising spreads and executions.
What it does
- Multi-DEX reserve scanner with sub-second refresh
- Profitability model accounting for gas, slippage and fees
- Atomic flash-loan execution in a single transaction
- MEV-aware submission to reduce front-running
- Live dashboard for spreads, trades and win rate
Scope of work
- Smart-contract executor for atomic flash-loan arbitrage
- Off-chain scanner streaming reserves from multiple Base DEXs
- Profitability engine modelling gas, slippage and pool fees
- Operator dashboard for spreads, executions and win rate
Timeline
Weeks 1-2
Research
Mapped Base L2 liquidity, DEX routers and realistic spread windows.
Weeks 3-5
Contracts
Built and tested the flash-loan executor with atomic revert safety.
Weeks 6-8
Scanner
Streamed pool reserves sub-second and ranked opportunities after costs.
Weeks 9-10
Dashboard
Shipped the live operator view and MEV-aware submission path.
Outcomes
Sub-second
Opportunity refresh across tracked pools
1 tx
Borrow, swap and repay settled atomically
End-to-end
Detection through on-chain settlement