Blockchain Backend Engineer - Secure APIs & Smart Contracts

Placements24; East London; Hybrid; ZAR 1,500,000 - 2,167,000; Full time

Benefits offered by this job

Competitive salary and performance-‑dr

Flexible hybrid work model

Comprehensive health, dental, and view

Generous paid time off and holidays

Professional development opportunities

Job summary

Placements24 in East London is seeking a Backend Blockchain Developer to design, build, and integrate backend services and APIs that securely interact with blockchain networks. The role focuses on scalable financial applications and robust data management.

You will implement smart contracts, collaborate with frontend teams, ensure security, and stay aligned with evolving blockchain technologies. A strong background in Go/Node.js/Python/Java and cloud/containerization is essential.

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, or related field.
• Minimum of 4 years of professional backend development experience, with at least 1 year focused on blockchain integration.
• Proficiency in backend programming languages such as Go, Node.js, Python, or Java.
• Experience with blockchain protocols (e.g., Ethereum, Hyperledger Fabric) and smart contract development (e.g., Solidity).
• Strong experience with RESTful API design and development.
• Familiarity with database technologies (e.g., SQL, NoSQL).
• Understanding of distributed systems, cryptography, and consensus mechanisms.
• Experience with cloud platforms (AWS, Azure, GCP) and containerization (Docker, Kubernetes).
• Knowledge of security best practices for backend development and blockchain integration.
• Excellent problem-solving, debugging, and communication skills.

Responsibilities

• Design, develop, and maintain scalable backend services and APIs for blockchain integration.
• Implement smart contracts and ensure their integration with backend systems.
• Manage database design and operations for blockchain-related data.
• Develop and maintain secure communication channels between backend services and blockchain nodes.
• Collaborate with frontend developers to deliver seamless user experiences.
• Write efficient, maintainable, and well-tested code.
• Optimize application performance and ensure system scalability.
• Troubleshoot and resolve backend and blockchain-related issues.
• Stay up-to-date with the latest backend development trends and blockchain technologies.
• Participate in code reviews and contribute to architectural design discussions.

Skills

Go

Node.js

Python

Java

RESTful API design

Distributed systems

Education

Bachelor's degree in Computer Science or related field

Tools

Docker

Kubernetes

AWS

Azure

GCP

Job description

Placements24 in East London is seeking a Backend Blockchain Developer to design, build, and integrate backend services and APIs that securely interact with blockchain networks. The role focuses on scalable financial applications and robust data management.

You will implement smart contracts, collaborate with frontend teams, ensure security, and stay aligned with evolving blockchain technologies. A strong background in Go/Node.js/Python/Java and cloud/containerization is essential.