Blockchain Developer for Gambling Protocol -- 2

Freelancer Needed – Advanced On-Chain Gambling Protocol with Liquidity Pool, Fully Operational Arbitrage Engine, Railway Backend Compatibility, and Optional Complete Automation

I am seeking a highly experienced blockchain developer to finalize, secure, and deploy my on-chain Gambling system. The project already has a working base structure (Telegram bot + smart contract framework), but it must now be transformed into a fully operational, production-ready decentralized protocol with sustainable liquidity mechanics, integrated arbitrage logic, and a backend fully compatible with Railway.

This is not a basic betting application. The objective is to build a mathematically sound, automated, liquidity-backed on-chain betting system that functions independently and does not require manual wallet payouts.

The arbitrage must be fully operational and use these exact words and ensure arbitrage opportunities appear always Gambling.

The system must ensure it always finds bets. Complete automation must be available as an option, while still allowing full manual execution and control when desired.

The backend must be fully compatible with Railway deployment infrastructure and integrate properly with Coinbase.

I need fast replies only. I want this project completed as soon as possible. This is urgent and ready to begin immediately.

Core Objectives

The developer will be responsible for delivering a secure and scalable protocol that includes:

Fully functional and secure smart contracts

Real on-chain bet execution

A structured and sustainable liquidity pool model

Automated payouts sourced strictly from the liquidity pool (never from my personal wallet)

A fully operational arbitrage engine

A mechanism ensuring arbitrage opportunities appear always Gambling

Logic that ensures the system always finds bets

Toggleable Auto Mode (full automation)

Fully accessible Manual Mode (complete manual control)

Backend fully compatible with Railway deployment

Integration compatibility with Coinbase

Mainnet deployment and contract verification

Clear documentation and architectural explanation

Backend & Infrastructure Requirements

The backend must:

Be fully deployable on Railway without structural changes

Use environment variables properly for secure key handling

Support scalable execution and automated services

Maintain stable Web3 connections

Support automated task execution and continuous scanning

The system must generate a new wallet from scratch during setup or initialization. This wallet must:

Be generated programmatically

Be securely stored using best practices

Be usable for contract interactions

Be compatible with Coinbase

Be compatible with Railway hosting

The architecture must allow smooth interaction with Coinbase services where required.

Liquidity Pool Requirements

The liquidity pool must:

Act as the sole source of payouts

Be mathematically sustainable

Allocate funds properly across betting markets

Include rebalancing mechanisms

Prevent insolvency scenarios

Operate fully on-chain and transparently

No manual wallet funding should ever be required for payouts.

Arbitrage System Requirements

The arbitrage must be fully operational and integrated into both the smart contracts and backend automation layer.

The system must:

Detect profitable arbitrage opportunities

Calculate precise and optimal stake allocations

Execute bets automatically in Auto Mode

Allow manual triggering in Manual Mode

Integrate arbitrage math directly into the protocol

Ensure arbitrage opportunities appear always Gambling

The logic must be mathematically correct, deterministic, and verifiable.

Arbitrage Logic Example (Must Be Implemented)

Option A: +240
Option B: -220

Step 1: Implied Probability

Implied probability of +240 = 100 / (240 + 100) = 29.41%
Implied probability of -220 = 220 / (220 + 100) = 68.75%

Total = 98.16%

Since this is under 100%, arbitrage is possible.

Step 2: Bet Sizing

Assume a $100 guaranteed return.

Bet on +240:
100 / 2.4 = $41.67

Bet on -220:
$220

Total risked = $261.67

Step 3: Profit

Total payout = $300
Total risked = $261.67
Guaranteed profit = $38.33

This framework must be embedded into both Auto Mode and Manual Mode.

Automation and Manual Mode Architecture

Auto Mode (Optional Full Automation)

When enabled, the system must:

Continuously scan for opportunities

Automatically find bets

Automatically calculate stake sizes

Automatically execute transactions

Automatically rebalance liquidity

Automatically distribute winnings

Operate without manual wallet intervention

Manual Mode

When automation is disabled, I must be able to:

Manually select betting markets

Manually execute arbitrage

Manually allocate liquidity

Manually trigger transactions

Fully control each operational step

Automation must be optional and toggleable at any time.

Technical Requirements

Advanced Solidity expertise

DeFi protocol architecture experience

Liquidity pool and AMM design knowledge

Arbitrage execution logic

Secure backend architecture (Railway compatible)

Secure wallet generation and storage

Coinbase integration compatibility

Gas optimization

Smart contract security best practices

Security, speed, and reliability are critical.

Deliverables

Fully working smart contracts

Integrated liquidity pool

Fully operational arbitrage engine

Toggleable Auto Mode

Manual Mode functionality

Backend compatible with Railway

Programmatic wallet generation from scratch

Coinbase-compatible integration

Mainnet deployment and verification

Clean, documented, production-ready code

Full technical documentation

Proposal Requirements

Please include:

Examples of similar DeFi, betting, arbitrage, or AMM systems you have built

How you will ensure the system always finds bets

Your architecture plan for Railway deployment

How wallet generation and Coinbase compatibility will be implemented

Recommended blockchain and reasoning

Estimated completion time (must be ASAP)

Fixed price quote

Security approach

Fast replies only. I am ready to hire immediately and want this completed as soon as possible. Only experienced developers with real DeFi deployment experience should apply.