Blockchain Developer

Job Title: Blockchain Developer

Location: London, UK (Hybrid: 2-3 Days to office every week)

Duration: 6 Months (Extendable)

Employment Type: Contract B2B/Freelance {Inside IR35}

Roles & Responsibilities:

About the Role:

We are seeking a highly skilled Blockchain Developer with strong hands-on experience in R3 Corda, Python, Microservices, and Node.js. You will join a forward-thinking engineering team working on enterprise-grade blockchain applications, primarily for the financial and regulated industries. The ideal candidate should possess a passion for decentralized systems, secure coding practices, and scalable backend services.

Key Responsibilities:

• Design, develop, and deploy blockchain-based solutions using R3 Corda for high-impact use cases.
• Build and maintain backend services using Python and Node.js, following microservices architecture.
• Develop and integrate smart contract logic and flows within the Corda framework.
• Collaborate with architects, DevOps, and product teams to translate requirements into scalable solutions.
• Design APIs, data models, and services ensuring high performance, scalability, and security.
• Conduct code reviews, write unit and integration tests, and follow CI/CD best practices.
• Stay up to date with emerging trends and technologies in blockchain and backend ecosystems.
• Participate in technical design discussions and contribute to architectural decisions.

Required Skills & Qualifications:

• 3+ years of professional experience in blockchain development, with a strong focus on R3 Corda.
• Proficient in Python and Node.js for backend development.
• Strong knowledge of microservices architecture and RESTful API design.
• Experience with Corda Flows, States, Contracts, and integration patterns.
• Understanding of cryptographic principles, distributed systems, and secure coding practices.
• Familiarity with databases (SQL and NoSQL), containerization (Docker), and cloud infrastructure (AWS/GCP/Azure).
• Strong problem-solving skills and ability to work in Agile/Scrum environments.
• Excellent communication and collaboration abilities.

Preferred Qualifications:

• Experience in financial services, supply chain, or regulated industries.
• Knowledge of other blockchain platforms (e.g., Hyperledger Fabric, Ethereum) is a plus.
• Exposure to Kubernetes and DevOps CI/CD pipelines.
• Contributions to open-source blockchain projects are an advantage.