

Blockchain Developer
β - Featured Role | Apply direct with Data Freelance Hub
This role is for a Blockchain Developer in London, UK (Hybrid) for 6 months (extendable), offering a contract pay rate. Key skills include R3 Corda, Python, Node.js, and microservices. Experience in financial services and secure coding practices is required.
π - Country
United Kingdom
π± - Currency
Β£ GBP
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π° - Day rate
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ποΈ - Date discovered
July 4, 2025
π - Project duration
More than 6 months
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ποΈ - Location type
Hybrid
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π - Contract type
Inside IR35
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π - Security clearance
Unknown
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π - Location detailed
London Area, United Kingdom
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π§ - Skills detailed
#Cloud #NoSQL #GCP (Google Cloud Platform) #Code Reviews #Scrum #Microservices #Security #DevOps #AWS (Amazon Web Services) #Docker #Azure #Agile #SQL (Structured Query Language) #API (Application Programming Interface) #Python #Scala #Databases #Kubernetes
Role description
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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:
β’ Design, develop, and deploy blockchain-based solutions using R3 Corda for high-impact use cases.
β’ Build and maintain backend services using Python and Node.js, following microservices architecture.
β’ Develop and integrate smart contract logic and flows within the Corda framework.
β’ Collaborate with architects, DevOps, and product teams to translate requirements into scalable solutions.
β’ Design APIs, data models, and services ensuring high performance, scalability, and security.
β’ Conduct code reviews, write unit and integration tests, and follow CI/CD best practices.
β’ Stay up to date with emerging trends and technologies in blockchain and backend ecosystems.
β’ Participate in technical design discussions and contribute to architectural decisions.
Required Skills & Qualifications:
β’ 3+ years of professional experience in blockchain development, with a strong focus on R3 Corda.
β’ Proficient in Python and Node.js for backend development.
β’ Strong knowledge of microservices architecture and RESTful API design.
β’ Experience with Corda Flows, States, Contracts, and integration patterns.
β’ Understanding of cryptographic principles, distributed systems, and secure coding practices.
β’ Familiarity with databases (SQL and NoSQL), containerization (Docker), and cloud infrastructure (AWS/GCP/Azure).
β’ Strong problem-solving skills and ability to work in Agile/Scrum environments.
β’ Excellent communication and collaboration abilities.
Preferred Qualifications:
β’ Experience in financial services, supply chain, or regulated industries.
β’ Knowledge of other blockchain platforms (e.g., Hyperledger Fabric, Ethereum) is a plus.
β’ Exposure to Kubernetes and DevOps CI/CD pipelines.
β’ Contributions to open-source blockchain projects are an advantage.