Senior Blockchain Engineer

We're Hiring: Senior Blockchain Engineer

Location: United Arab Emirates (Remote)

Employment Type: Full-Time

Experience Level: Senior

Work Arrangement: Fully Remote

About Us

We are a globally focused technology organization committed to developing secure, scalable, and innovative digital infrastructure and financial technology solutions across diverse markets.

Our multidisciplinary teams collaborate across Engineering, Product, Security, Finance, Compliance, Data, Operations, and external technology partners to build reliable distributed systems, blockchain applications, digital-asset infrastructure, and next-generation financial products.

The Role

We are seeking an experienced Senior Blockchain Engineer to design, develop, integrate, and optimize blockchain-based systems, decentralized applications, smart contracts, and distributed-ledger infrastructure.

The ideal candidate will combine strong software-engineering expertise with deep knowledge of blockchain protocols, smart-contract development, cryptography, decentralized architectures, digital assets, and blockchain security. The role will work closely with Product, Engineering, Security, Compliance, and external ecosystem partners to deliver secure, scalable, and production-ready blockchain solutions.

Key Responsibilities

• Design and develop secure, scalable, and reliable blockchain applications and distributed systems.
• Develop and maintain blockchain-based platforms, services, APIs, and infrastructure.
• Evaluate blockchain architectures and select appropriate technologies based on product, performance, security, and scalability requirements.
• Design solutions using public, private, permissioned, or hybrid blockchain architectures where appropriate.
• Develop and maintain smart contracts for supported blockchain networks.
• Write secure, efficient, maintainable, and well-tested smart-contract code.
• Implement decentralized application functionality across blockchain and off-chain components.
• Integrate blockchain networks with existing enterprise applications, databases, APIs, payment systems, and financial platforms.
• Develop blockchain APIs and services that expose distributed-ledger functionality to internal and external applications.
• Implement wallet connectivity, transaction management, address management, signing workflows, and blockchain integrations.
• Develop services for blockchain transaction submission, monitoring, confirmation, and reconciliation.
• Monitor blockchain transactions, network activity, confirmation times, failures, and operational exceptions.
• Build reliable mechanisms for handling transaction retries, failures, reorganization events, and network interruptions.
• Design blockchain data models and indexing solutions for efficient transaction and asset retrieval.
• Develop blockchain event listeners, transaction processors, indexers, and monitoring services.
• Work with blockchain nodes, RPC providers, infrastructure platforms, and network services.
• Configure, maintain, and optimize blockchain nodes and supporting infrastructure where required.
• Monitor node health, synchronization status, connectivity, resource utilization, and network performance.
• Develop highly available blockchain infrastructure and appropriate disaster-recovery mechanisms.
• Optimize blockchain applications for performance, scalability, transaction throughput, and cost efficiency.
• Analyze network fees, transaction costs, gas usage, and resource consumption.
• Optimize smart contracts and transaction workflows to reduce unnecessary execution costs.
• Evaluate Layer 1 and Layer 2 solutions and recommend appropriate architectures for product requirements.
• Assess interoperability solutions, cross-chain protocols, bridges, messaging systems, and blockchain integration technologies.
• Design secure mechanisms for blockchain interoperability and asset transfers where required.
• Implement cryptographic functionality and secure key-management practices in collaboration with security teams.
• Ensure private keys, credentials, secrets, and sensitive blockchain information are appropriately protected.
• Integrate hardware security modules, custody platforms, secure key-management systems, or institutional wallet solutions where applicable.
• Implement transaction-signing controls, authorization workflows, and multi-signature mechanisms where required.
• Collaborate with Security teams to identify and mitigate blockchain-specific security risks.
• Conduct smart-contract security reviews and coordinate independent audits where appropriate.
• Identify vulnerabilities including reentrancy, access-control weaknesses, arithmetic issues, oracle manipulation, front-running, flash-loan attacks, denial-of-service risks, and other blockchain-specific threats.
• Implement secure coding standards and development practices for blockchain systems.
• Develop automated unit, integration, functional, security, and smart-contract tests.
• Establish comprehensive test coverage for blockchain transactions, contract logic, edge cases, failure scenarios, and integrations.
• Support testnet deployments, network upgrades, contract migrations, and mainnet releases.
• Coordinate blockchain release processes, deployment approvals, version management, and rollback or contingency procedures.
• Monitor production blockchain applications and respond to technical incidents.
• Investigate failed transactions, contract errors, node failures, network disruptions, and integration issues.
• Lead root-cause analysis for significant blockchain incidents and implement corrective actions.
• Develop observability solutions covering logs, metrics, traces, transaction states, and blockchain events.
• Establish operational dashboards and alerts for blockchain infrastructure and application performance.
• Work closely with DevOps, Cloud, Platform Engineering, and Site Reliability teams to maintain production infrastructure.
• Support containerized deployments, cloud infrastructure, CI/CD pipelines, automated deployment, and infrastructure-as-code practices.
• Improve blockchain development and deployment workflows through automation.
• Collaborate with Product teams to translate business requirements into blockchain architecture and technical solutions.
• Participate in technical discovery, architecture reviews, design sessions, and product planning.
• Prepare technical specifications, architecture diagrams, API documentation, smart-contract documentation, and operational runbooks.
• Assess whether blockchain is the appropriate technology for specific business and product requirements.

Key Performance Indicators

• Blockchain system availability
• Blockchain application uptime
• Transaction processing success rate
• Transaction confirmation success rate
• Transaction processing latency
• Blockchain transaction throughput
• Smart-contract execution success rate
• Smart-contract failure rate
• Smart-contract security findings
• Critical vulnerability rate
• Security incident frequency
• Mean time to detect blockchain incidents
• Mean time to resolve blockchain incidents
• Blockchain node availability
• Node synchronization performance
• RPC availability
• API availability
• API response time
• Blockchain infrastructure scalability
• Transaction cost efficiency
• Gas utilization efficiency
• Network fee optimization
• Smart-contract execution efficiency
• Smart-contract test coverage
• Automated test coverage
• Deployment success rate
• Production release reliability
• Testnet validation completion
• Mainnet deployment success
• Defect escape rate
• Code review completion
• Technical debt reduction
• Incident recurrence rate
• Root-cause analysis completion
• Corrective-action completion
• Monitoring and alert coverage
• Disaster-recovery readiness
• Backup and recovery performance
• Infrastructure automation rate
• CI/CD deployment efficiency
• API integration reliability
• Blockchain data accuracy
• Transaction reconciliation accuracy
• Cross-chain transaction success
• Blockchain integration delivery
• Project delivery performance
• Development cycle time
• Feature delivery rate
• Engineering productivity
• Documentation completeness
• Architecture compliance
• External audit and security-review performance
• Regulatory and security compliance
• Technology cost efficiency
• Innovation and platform-improvement delivery

Ideal Candidate

The successful candidate should have strong experience in blockchain engineering, distributed systems, smart-contract development, Web3 infrastructure, decentralized applications, digital assets, or blockchain-based financial technology, preferably within fintech, financial services, technology, digital assets, payments, or enterprise technology environments.

The candidate should demonstrate:

• Strong software-engineering fundamentals and experience developing production-grade systems.
• Deep understanding of blockchain architecture and distributed-ledger technology.
• Strong experience with smart-contract development and blockchain application engineering.
• Proficiency in one or more relevant blockchain programming environments such as Solidity, Rust, Go, Java, TypeScript, or Python.
• Strong understanding of blockchain transaction lifecycle, consensus, blocks, nodes, wallets, addresses, and network operations.
• Experience working with one or more major blockchain ecosystems and their development frameworks.
• Strong understanding of EVM-based blockchain architecture is highly desirable.
• Experience developing and integrating blockchain APIs, SDKs, RPC services, and event-processing systems.
• Strong knowledge of cryptography, digital signatures, hashing, key management, and secure transaction signing.
• Experience implementing secure smart contracts and decentralized applications.
• Strong understanding of common smart-contract vulnerabilities and blockchain security risks.
• Experience with smart-contract testing, audits, deployment, upgrades, and contract lifecycle management.