Senior Blockchain Architect & Smart Contract Engineer

Abu Alhaj Smart Systems

Abu Dhabi

On-site

AED 300,000 - 540,000

Full time

8 days ago

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Job summary

Abu Alhaj Smart Systems in Abu Dhabi is seeking a mid‑level to senior Smart Contract Developer / Blockchain Solutions Architect to design, develop, secure, and implement blockchain‑based applications and decentralized solutions.

You will build secure contracts with Solidity, deploy on Ethereum and Layer 2 networks, create dApps, and integrate with web apps, APIs, wallets, and backend services while collaborating with product, security, and engineering teams.

Qualifications

Proven blockchain development experience with smart contracts.
Strong knowledge of Solidity and Web3 development.
Experience deploying on Ethereum and Layer-2 networks.
Familiarity with security practices and audits.

Responsibilities

Design, develop, test, deploy, and maintain smart contracts for blockchain applications.
Develop secure and efficient smart contracts using Solidity and other relevant blockchain programming languages.
Design blockchain architectures that support scalability, security, performance, and reliability.
Analyze business requirements and translate them into practical blockchain-based solutions.
Develop decentralized applications (dApps) and blockchain-enabled services.
Collaborate with product managers, software engineers, designers, and business stakeholders throughout the development lifecycle.
Define technical architecture, system components, blockchain protocols, and integration strategies.
Evaluate blockchain networks and select suitable platforms based on project requirements.
Work with Ethereum and other compatible Layer 1 and Layer 2 blockchain ecosystems.
Develop and integrate smart contracts with web applications, APIs, wallets, and backend services.
Design token-based systems, digital assets, and blockchain transaction workflows where applicable.
Implement contract standards such as ERC-20, ERC-721, ERC-1155, and other relevant protocols.
Conduct smart contract testing, debugging, optimization, and deployment across development and production environments.
Perform code reviews and identify potential security, performance, and architectural issues.
Work closely with cybersecurity teams to strengthen blockchain application security.
Identify vulnerabilities such as reentrancy, access-control issues, integer-related vulnerabilities, oracle manipulation, and other smart contract risks.
Support smart contract audits and address findings identified through security assessments.
Optimize smart contract code for gas efficiency, transaction performance, and maintainability.
Design secure wallet, key-management, authentication, and transaction-signing workflows.
Integrate blockchain solutions with existing enterprise systems, databases, APIs, and cloud environments.
Develop blockchain integration patterns for financial, supply-chain, identity, asset-management, or other business applications.
Evaluate decentralized protocols, infrastructure providers, blockchain frameworks, and development tools.
Monitor blockchain technology developments and assess emerging protocols and architectures.
Research Layer 2 solutions, interoperability technologies, decentralized storage, oracles, and cross-chain technologies.
Prepare technical architecture documents, system diagrams, API specifications, and smart contract documentation.
Establish development standards, coding practices, testing procedures, and deployment processes for blockchain projects.
Support CI/CD pipelines and automated testing for blockchain applications and smart contracts.
Troubleshoot blockchain transactions, contract failures, integration issues, and production incidents.
Work with external blockchain vendors, infrastructure providers, auditors, and technology partners when required.
Provide technical guidance and mentorship to developers working on blockchain projects.
Ensure blockchain solutions are designed with appropriate governance, monitoring, compliance, and operational controls.