Blockchain Developer

Blockchain Developer

Posted 1 week ago by Ubique Systems

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Negotiable
Inside
Hybrid
London Area, United Kingdom
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API Design Application Programming Interface (API) Azure Kubernetes Service Blockchain Cloud Computing Cloud Infrastructure Cloud Technology Containerisation Continuous Integration and Continuous Delivery Corda Datamodel Data Modeling DevOps Docker (Software) Ethereum Financial Services Hyperledger Kubernetes Market Trend Microservices Node.js Nodes (Networking) NoSQL Open Source Development Python (Programming Language) RESTful API Scalability Secure Coding Software Coding Software Development SQL (Programming Language)

Summary: We are looking for a Blockchain Developer with extensive experience in R3 Corda, Python, Microservices, and Node.js to join a dynamic engineering team focused on enterprise-grade blockchain applications for the financial sector. The role involves designing and deploying blockchain solutions, collaborating with various teams, and ensuring high performance and security in backend services. The ideal candidate should have a strong passion for decentralized systems and secure coding practices. This is a contract position based in London with a hybrid working arrangement.

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.

Key Skills:

  • 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.

Salary (Rate): undetermined

City: London

Country: United Kingdom

Working Arrangements: hybrid

IR35 Status: inside IR35

Seniority Level: undetermined

Industry: IT

Detailed Description From Employer:

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.
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