Blockchain Developer - Backend

Placements24; Soweto; On-site; ZAR 900,000 - 1,300,000; Full time

Job summary

Placements24 is seeking a Backend Blockchain Developer in Soweto, Gauteng, ZA. You will build robust backend services and APIs for blockchain applications, optimize and deploy smart contracts, and integrate protocols with existing systems.

The role emphasizes security, scalability, and collaboration with frontend and product teams. The candidate should have 4+ years in backend development, solid blockchain experience, knowledge of Solidity, and proficiency in Node.js, Python, Go or Java.

Qualifications

• Bachelor's degree or equivalent in CS/SE.
• 4+ years backend development experience.
• Proven blockchain development experience.
• Experience with Solidity and smart contracts.
• Proficiency in Node.js, Python, Go or Java.
• DBs such as PostgreSQL or MongoDB.
• Familiarity with cloud platforms (AWS/Azure) and Docker.
• Strong problem-solving and teamwork skills.
• Experience with version control systems like Git.

Responsibilities

• Build and maintain backend services and APIs for blockchain apps.
• Develop and optimize smart contracts for payments and transactions.
• Integrate blockchain protocols with backend and third-party services.
• Ensure security, scalability, and performance of backend systems.
• Write clean, maintainable, well-documented code.
• Collaborate with frontend developers for seamless integration.
• Participate in code reviews, testing and debugging.
• Stay updated on blockchain tech and backend trends.
• Contribute to architectural decisions and strategy.

Skills

Blockchain dev

Backend dev

Smart contracts

Node.js

Python

Go

Java

Distributed ledger

Problem-solving

Teamwork

Education

Bachelor's degree in CS/SE

Tools

PostgreSQL

MongoDB

AWS

Azure

Docker

Git

CI/CD

Job description

About the Role Our client, a rapidly growing fintech startup specializing in decentralized payment solutions, is looking for a skilled Backend Blockchain Developer to join their team in Soweto, Gauteng, ZA. This role is critical for developing and maintaining the server-side logic and blockchain integrations that power our client's innovative products. You will work closely with front-end developers and product managers to deliver high-quality, secure, and scalable decentralized applications. This is an exciting opportunity to contribute to the evolution of digital finance and gain hands-on experience in a fast-paced, innovative environment. The ideal candidate is a strong backend engineer with a passion for blockchain technology.

Key Responsibilities

• Develop and maintain robust backend services and APIs for blockchain applications.
• Implement and optimize smart contracts for payment processing and transaction management.
• Integrate blockchain protocols with existing backend systems and third-party services.
• Ensure the security, scalability, and performance of backend infrastructure.
• Write efficient, well-documented, and maintainable code.
• Collaborate with front-end developers to ensure seamless integration between the client and server sides.
• Participate in code reviews, testing, and debugging processes.
• Stay updated on the latest backend development technologies and blockchain advancements.
• Contribute to architectural decisions and technical strategy.

Requirements

• Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent experience.
• Minimum of 4 years of professional backend development experience.
• Proven experience with blockchain development, including smart contract programming (e.g., Solidity).
• Proficiency in backend programming languages such as Node.js, Python, Go, or Java.
• Strong understanding of blockchain principles, distributed ledger technology, and cryptocurrency concepts.
• Experience with database management (e.g., PostgreSQL, MongoDB).
• Familiarity with cloud platforms (e.g., AWS, Azure) and containerization (Docker).
• Excellent problem-solving and analytical skills.
• Strong communication and teamwork abilities.
• Experience with version control systems (Git).

Benefits

Our client offers a competitive salary, comprehensive benefits, and opportunities for professional growth within a dynamic startup environment. You will play a key role in developing innovative solutions in the burgeoning blockchain space. This position is located in Soweto, Gauteng, ZA, providing a chance to contribute to local technological development. Join a collaborative team focused on building the future of decentralized finance.