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*.

.*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.