Advanced Multi-Layer Bundle Arbitrage Engineer

Senior MEV Engineer – Multi-Layer Bundle Arbitrage (Flashbots) – Production Searcher

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## Short Summary (Under 400 Characters)

Build a production-grade MEV Multi-Layer Bundle Arbitrage (MBA) searcher with Flashbots integration. Deliver finder, high-fidelity simulator, bundle composer, execution engine, Docker deployment, monitoring, and handover. No sandwich or exploit code. Must have real MEV / bundle experience.

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## Full Project Description (Main Section)

### Overview

We are hiring an experienced blockchain engineer to build a **production-ready Multi-Layer / Complex Bundle Arbitrage (MBA) searcher** capable of:

* Discovering multi-hop, multi-DEX arbitrage chains
* Simulating profitability (gas, slippage, fees, tips)
* Constructing atomic bundles
* Submitting bundles via Flashbots / MEV relays
* Logging, monitoring, and safely deploying

This is NOT a basic arbitrage bot. This must be a serious MEV searcher architecture.

-No sandwich attacks. No exploit logic. No malicious oracle manipulation.

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# Core Deliverables

## Finder / Pathfinder Engine

* Scan mempool + on-chain pools
* Generate 2-hop to 4-hop arbitrage paths
* DEX configurable (Uniswap, SushiSwap, Curve, Balancer)
* TTL-based opportunity lifecycle

## High-Fidelity Simulator

Must account for:

* Gas estimation
* DEX fees
* Slippage modeling
* Flash-loan fees (if enabled later)
* Bundle inclusion conditions
* Tip strategy

Must support:

* Mainnet-fork simulation (Hardhat or Foundry)
* Historical block replay

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## Bundle Composer + Flashbots Integration

* Build ordered bundle payloads
* Support targeting next N blocks
* Retry + fallback logic
* Configurable bribe/tip strategy
* Private relay submission

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## Execution Engine

* Nonce management
* Dynamic gas logic
* Revert protection
* Parallel submission handling
* Safety kill switch

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## Deployment & Ops

* Dockerized system
* Deployment scripts for VPS/cloud
* Logging + monitoring (Telegram/Slack alerts)
* P&L tracking per bundle

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## Security

* No private keys in code
* Secure key storage instructions
* Threat model document
* 30-day bug warranty

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# Technical Stack (Preferred)

* Node.js (TypeScript) OR Rust (justify choice)
* Foundry / Hardhat
* Docker
* Redis/Postgres
* CI/CD
* Flashbots / MEV-Share integration

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# Required Experience (Bids Without This Will Be Ignored)

* Demonstrable MEV bundle submission experience
* Built trading bots or on-chain arbitrage systems
* Strong DeFi protocol knowledge
* Production backend engineering experience
* Provide GitHub or portfolio proof

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# Milestones (Suggested Structure)

Phase 1 – Architecture & Design
Phase 2 – Pathfinder + Simulator
Phase 3 – Bundle Integration
Phase 4 – Execution + Monitoring
Phase 5 – Deployment + Handover + Warranty

Final payment only after:

* Integration tests pass
* Demo completed
* Repo transferred
* Documentation delivered

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# Budget Guidance

This is an advanced MEV system.

Experienced MEV engineers should quote accordingly.
Low-quality copy-paste bots will be rejected.

If you do not have real bundle experience, please do not bid.

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# Required Proposal Format

Your bid must include:

1. Past MEV or trading bot projects
2. Your preferred stack and why
3. How you will simulate multi-hop slippage accurately
4. Estimated timeline
5. Team size (if applicable)

Generic proposals will be ignored.

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# Skills Tags (Add These)

* Solidity
* Ethereum
* Blockchain
* Smart Contracts
* Node.js
* Rust
* Trading Bot
* DeFi
* Web3.js
* Docker

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# Screening Questions (Paste in Clarification Board)

1. Have you submitted bundles to Flashbots or MEV-Share before? Explain.
2. How do you prevent stale simulation losses?
3. Describe your slippage modeling approach for 3+ hop arbitrage.
4. How do you handle nonce collisions in parallel bundle submissions?
5. Provide links to similar work.

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# NDA Message (Send to shortlisted candidates)

Before sharing architecture details or repository access, we require a signed NDA.
Please confirm willingness to sign a standard mutual NDA.

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