Blockchain Developer (Backend)

Placements24; United States; Hybrid; USD 81,000 - 148,000; Full time

Benefits offered by this job

Hybrid work model

Competitive salary

Health insurance

Retirement plan

Job summary

Placements24 is seeking a skilled Blockchain Developer (Backend) to design, develop and maintain robust backend systems for decentralized applications in London. You will build the core infrastructure powering blockchain solutions with a strong focus on scalability, security and efficiency.

The role requires 3+ years in backend development and expertise in Node.js, Python, Go, or Java, plus experience with Solidity and Web3.js/ethers.js.

Qualifications

• Bachelor's degree in CS, Engineering or related field.
• Minimum 3 years of professional backend development experience.
• Proficiency in backend languages: Node.js, Python, Go, or Java.

Responsibilities

• Develop and maintain backend services and APIs that interact with blockchain networks.
• Implement and optimize smart contracts for various use cases with focus on security and efficiency.
• Integrate blockchain components with existing enterprise systems and third-party services.
• Design and manage databases relevant to blockchain applications.
• Write clean, well-documented, and thoroughly tested code following best practices.
• Collaborate with frontend developers to ensure seamless user experiences.
• Troubleshoot and resolve backend issues to ensure system stability and performance.

Skills

Node.js

Python

Go

Java

Smart contracts

Education

Bachelor's degree in Computer Science or related field

Tools

Web3.js

ethers.js

Job description

About the Role

Our client is seeking a skilled Blockchain Developer (Backend) to design, develop, and maintain robust backend systems for their decentralized applications and platforms in East London . You will be instrumental in building the core infrastructure that powers our client's blockchain solutions, focusing on scalability, security, and efficiency. This role requires a strong foundation in backend development principles combined with a solid understanding of blockchain technology and smart contract interactions. You will work collaboratively with frontend developers and other stakeholders to deliver high-quality, innovative products.

Key Responsibilities

• Develop and maintain backend services and APIs that interact with blockchain networks.
• Implement and optimize smart contracts for various use cases, ensuring security and efficiency.
• Integrate blockchain components with existing enterprise systems and third‑party services.
• Design and manage databases relevant to blockchain applications.
• Write clean, well‑documented, and thoroughly tested code following best practices.
• Collaborate with frontend developers to ensure seamless user experiences.
• Troubleshoot and resolve backend issues, ensuring system stability and performance.

Requirements

• Bachelor's degree in Computer Science, Engineering, or a related technical field.
• Minimum of 3 years of professional backend development experience.
• Proficiency in backend programming languages such as Node.js, Python, Go, or Java.
• Experience with blockchain development, including smart contract implementation (e.g., Solidity) and interaction using libraries like Web3.js or ethers.js.
• Understanding of distributed ledger technology, consensus mechanisms, and cryptographic principles.
• Experience with RESTful APIs, database management (SQL/NoSQL), and cloud platforms.

Benefits

• Competitive salary and performance-based bonuses.
• Comprehensive health insurance and retirement savings plan.
• Opportunities for professional development and skill enhancement in blockchain technologies.
• Hybrid work model to support work‑life balance.
• A dynamic team environment in East London focused on innovation and impactful solutions.