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, f