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.

Contract Requirements

• 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.

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 multim‑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).

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