Senior Smart Contract Developer - London and remote - 6 months+

Senior Smart Contract Developer - London and remote - 6 months+/RATE: £525 per day inside IR35 One of our Blue Chip Clients is urgently looking for a Senior Smart Contract Developer. For this role you will need to be onsite in London 2 days per week. Please find some details below: CONTRACTOR MUST BE ELIGIBLE FOR BPSS MUST BE PAYE THROUGH UMBRELLA

• Role Summary
We are seeking an experienced.
• Smart Contract Developer with strong expertise in.enterprise blockchain platforms,.Solidity-based smart contracts, and.cloud-native Back End services. The ideal candidate will have hands-on experience delivering.production-grade blockchain solutions across domains such as.banking, supply chain, payments, and sustainability, and will be comfortable working in.consortium-led, regulated environments.
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• Key Responsibilities
Design, develop, test, and deploy smart contracts for enterprise blockchain platforms (Ethereum, GoQuorum, Hyperledger Besu, Corda). Implement asset tokenization, on-chain/off-chain data models, and blockchain transaction workflows. Develop and integrate RESTful APIs and microservices (Node.js/Java) to interact with smart contracts. Ensure security, performance, and scalability of smart contracts and blockchain applications. Collaborate with architects, product owners, and external partners in multi-organization blockchain networks. Lead or mentor development teams, enforcing coding standards, testing, and best practices. Work closely with cloud infrastructure teams to deploy blockchain solutions using Azure/AWS services. Support POCs, innovation initiatives, and exploration of Layer 2 scaling solutions. Participate in design reviews, audits, and governance processes related to blockchain systems.
• Required Skills & Experience
8+ years of experience in software engineering with strong blockchain focus. Hands-on experience with Solidity smart contract development. Strong understanding of Ethereum-compatible platforms (GoQuorum, Hyperledger Besu). Experience with enterprise blockchain frameworks such as R3 Corda and Ripple. Proficiency in Node.js, TypeScript, and/or Java (Spring Boot). Strong knowledge of microservices architecture and asynchronous processing patterns. Experience designing on-chain vs off-chain data models. Familiarity with REST APIs, event-driven systems, and message queues. Solid understanding of blockchain security concepts (permissions, key management, transaction integrity). Please send CV for full details and immediate interviews. We are a preferred supplier to the client.

8+ years of experience in software engineering with strong blockchain focus. Hands-on experience with Solidity smart contract development. Strong understanding of Ethereum-compatible platforms (GoQuorum, Hyperledger Besu). Experience with enterprise blockchain frameworks such as R3 Corda and Ripple. Proficiency in Node.js, TypeScript, and/or Java (Spring Boot). Strong knowledge of microservices architecture and asynchronous processing patterns. Experience designing on-chain vs off-chain data models. Familiarity with REST APIs, event-driven systems, and message queues. Solid understanding of blockchain security concepts (permissions, key management, transaction integrity). Please send CV for full details and immediate interviews. We are a preferred supplier to the client.