Senior Blockchain Engineer – Smart Contracts & Custody Infrastructure

فام للاستثمار; Sharjah; On-site; AED 400,000 - 700,000; Full time

Benefits offered by this job

Competitive salary

Bonus opportunities

Job summary

مام للاستثمار in Dubai, UAE, seeks a Senior Blockchain Engineer with deep expertise in smart contract development, token creation, Ethereum infrastructure, and custody-to-wallet transactions. You will design, deploy, audit, and optimize blockchain solutions, integrating with custody platforms and wallets across EVM networks.

The role requires senior technical leadership, hands-on development, and strong security focus, with experience in Ethereum Mainnet, RPC tooling, and wallet integrations.

Qualifications

• Minimum 5+ years of blockchain experience.
• Proven track record deploying ERC-20 tokens.
• Strong knowledge of Solidity, EVM, and security patterns.
• Experience with custody infrastructure and wallet transactions.
• Proficient in Node.js, TypeScript, and web3 libraries.

Responsibilities

• Design, develop, deploy, and maintain smart contracts on Ethereum.
• Build and deploy ERC-20 tokens with minting, transfers, and vesting.
• Ensure secure custody-to-wallet transfers and integration with wallets.
• Audit, optimize, and troubleshoot blockchain infrastructure and APIs.
• Collaborate with backend teams to integrate blockchain solutions.

Skills

Solidity & Ethereum

Smart contract development

Node.js / TypeScript

Web3 / ethers.js

Security auditing

Tools

Hardhat

Foundry

OpenZeppelin

Linux

Job description

Job Overview

We are seeking a highly experienced Senior Blockchain Engineer with proven expertise in smart contract development, cryptocurrency token creation, Ethereum infrastructure, and custody-to-wallet transaction execution.

The successful candidate will be responsible for developing and deploying blockchain solutions, auditing and optimizing smart contracts, and troubleshooting complex cryptocurrency transfer operations.

The candidate must have strong hands-on experience with existing proprietary custody systems, smart contract integrations, and Ethereum Mainnet transaction execution.

Location: Dubai, UAE

Experience: 5+ Years

Employment Type: Full-Time / Contract

Industry: Blockchain, Web3 & Digital Assets

Key Responsibilities:

1. Smart Contract Development & Management

• Design, develop, deploy, and maintain smart contracts using Solidity.


• Develop secure and optimized smart contracts on Ethereum and other EVM-compatible networks.


• Debug, test, upgrade, and optimize existing smart contracts.


• Implement access controls, multi signature authorization, and secure contract execution.


• Investigate smart contract execution failures and transaction reverts.


• Integrate smart contracts with custody platforms, wallets, and backend systems.

2. Token Creation & Deployment

• Design, develop, and deploy ERC-20 tokens and other applicable token standards.


• Implement token minting, burning, transfers, vesting, and distribution mechanisms.


• Develop token management and administration systems.


• Configure token permissions, ownership, and supply controls.


• Integrate tokens with MetaMask, Phantom, and other compatible wallets.


• Deploy and verify token contracts on Ethereum Mainnet and supported EVM networks.


• Perform token security testing and smart contract verification.

3. Custody Infrastructure & Wallet Transfers

• Analyze and troubleshoot existing proprietary cryptocurrency custody infrastructure.


• Execute authorized cryptocurrency transfers from custody systems to external wallets.


• Diagnose transaction signing, broadcasting, confirmation, and execution issues.


• Investigate transaction hashes, RPC errors, nonce conflicts, gas issues, and failed transfers.


• Troubleshoot VPS servers, blockchain nodes, APIs, and smart contract integrations.


• Ensure successful and verifiable on-chain transaction execution.

4. Blockchain Infrastructure & Backend Integration

• Configure and manage Ethereum RPC connections and blockchain node integrations.


• Maintain Linux/VPS environments supporting blockchain operations.


• Develop backend integrations using Node.js, TypeScript, Python, ethers.js, and web3.py.


• Implement secure transaction monitoring and blockchain event tracking.


• Optimize transaction processing, reliability, and system performance.

5. Blockchain Security

• Apply secure smart contract development practices.


• Conduct vulnerability assessments and coordinate smart contract audits.


• Implement secure transaction signing and wallet authorization procedures.


• Understand MPC, multigeniture wallets, hardware security modules (HSM), and private-key management.


• Protect digital assets through appropriate access controls and transaction approval procedures.

Required Qualifications:

• 5 +years of relevant blockchain experience.


• Advanced proficiency in Solidity and Ethereum Virtual Machine (EVM).


• Proven experience creating and deploying ERC-20 tokens.


• Strong knowledge of smart contract architecture, testing, and security.


• Demonstrated experience with custody infrastructure and wallet transaction execution.


• Advanced knowledge of Ethereum Mainnet, RPC, transaction lifecycle, and blockchain explorers.


• Proficiency in JavaScript/TypeScript, Node.js, Python, ethers.js, and web3.py.


• Experience with Hardhat, Foundry, and OpenZeppelin.


• Strong Linux/VPS and API troubleshooting skills.


• Ability to independently diagnose and resolve complex blockchain infrastructure issues.

Candidate Evaluation

Applicants should provide:

• 1. Examples of deployed smart contracts


• 2. Verified contract addresses on public blockchain explorers.


• 3. Details of previous custody-to-wallet transfer projects.


• 4. Examples of complex Ethereum transaction issues successfully resolved.


• 5. Relevant GitHub repositories, technical portfolios, or professional references.

Very competitive salary with attractive bonuses