Senior Blockchain Engineer (Backend)

Placements24; London Borough of Newham; Hybrid; GBP 120,000 - 160,000; Full time

Job summary

Placements24 is seeking a Senior Backend Blockchain Engineer to join our remote-first team. You will design, build, and scale backend systems for decentralized applications, with a focus on performance, security, and reliability.

You will work across time zones with autonomy and collaboration, implementing robust APIs, developing smart contracts, and reviewing code to uphold high standards. A strong background in distributed systems and blockchain technologies is essential.

Qualifications

• 5+ years backend development with 3+ years in blockchain.
• Experience building distributed microservices.
• Proficiency in Go, Node.js, Python, or Java and Solidity.

Responsibilities

• Design and maintain scalable backend systems for blockchain apps.
• Build robust APIs for inter-service integration.
• Develop and optimize smart contracts.
• Ensure performance, security, and reliability.
• Collaborate with frontend, product, and stakeholders.
• Conduct code reviews and uphold coding standards.

Skills

Blockchain

Backend development

Distributed systems

Go

Node.js

Python

Java

Education

Bachelor's or Master's in CS/Engineering

Tools

Docker

Kubernetes

AWS

SQL

NoSQL

Solidity

Job description

About the Role

Our client is seeking a highly experienced Senior Backend Blockchain Engineer to join their globally distributed, remote-first team. This is a critical role responsible for designing, developing, and maintaining the core backend infrastructure of our innovative blockchain solutions. You will be instrumental in building scalable, secure, and efficient systems that power our decentralized applications and services. The ideal candidate possesses a deep understanding of backend development principles, extensive experience with blockchain technologies, and a passion for creating robust and performant systems. As part of a remote team, you will thrive in an environment that emphasizes asynchronous communication, autonomy, and collaboration across time zones. This position offers the opportunity to work on challenging and impactful projects from the comfort of your home office, contributing to the advancement of blockchain technology on a global scale. Your expertise in backend architecture and development will be key to our success in this rapidly evolving field. This role is perfect for a seasoned engineer looking for significant impact and flexibility.

Key Responsibilities

• Design, develop, and implement scalable and secure backend systems for blockchain applications.
• Build and maintain robust APIs for seamless integration between different components and services.
• Develop and optimize smart contracts and interact with blockchain networks.
• Ensure the performance, quality, and responsiveness of applications.
• Collaborate with front-end developers, product managers, and other stakeholders to define and deliver new features.
• Implement security best practices throughout the development lifecycle.
• Troubleshoot, debug, and upgrade existing systems.
• Write clean, efficient, and well-documented code.
• Conduct code reviews and provide constructive feedback to team members.
• Stay current with emerging backend technologies and blockchain advancements.

Requirements

• Bachelor's or Master's degree in Computer Science, Engineering, or a related field.
• 5+ years of professional backend development experience, with a strong focus (3+ years) on blockchain technologies.
• Proven experience in building complex distributed systems and microservices.
• Proficiency in backend programming languages such as Go, Node.js, Python, or Java.
• Experience with smart contract development (e.g., Solidity) and interacting with blockchain nodes.
• Familiarity with blockchain protocols (e.g., Ethereum, Bitcoin, Hyperledger) and their underlying architecture.
• Experience with database technologies (SQL and NoSQL).
• Knowledge of cloud platforms (AWS, Azure, GCP) and containerization (Docker, Kubernetes).
• Strong understanding of security principles and best practices.
• Excellent problem-solving, analytical, and communication skills.
• Proven ability to work effectively in a fully remote environment.

Benefits

• Our client offers a competitive salary, performance bonuses, and a comprehensive benefits package including health, retirement, and paid time off.
• As a fully remote role, you will enjoy exceptional flexibility and work-life balance, with the freedom to work from anywhere.
• We provide a generous budget for home office setup and continuous professional development opportunities, including access to online courses and industry conferences.
• You will be part of a highly skilled, collaborative, and innovative global team, working on cutting-edge blockchain projects.
• This role offers significant autonomy and the chance to shape the future of decentralized technology.