Senior Blockchain Developer (Remote-First)

Placements24; Johannesburg; Hybrid; ZAR 900,000 - 1,300,000; Full time

Benefits offered by this job

Health insurance

Stock options

Professional development

Job summary

Placements24 is seeking a Senior Blockchain Developer to join a fully remote team building next‑generation DeFi products. The role focuses on secure smart contract development, scalable infrastructure, and cross‑platform deployment, with a strong emphasis on cryptography and distributed ledger technology.

The ideal candidate will have 5+ years in software development, at least 3 years in blockchain, and experience with Solidity, Hardhat, Truffle, and Web3.js.

Qualifications

• 5+ years of professional software development experience, with at least 3 years in blockchain.
• Proficiency in Solidity and smart contract development.
• Experience with Hardhat/Truffle and Web3.js.
• Strong cryptography and distributed ledger knowledge.
• Experience with Node.js, Python, or Go is a plus.
• Security-focused coding practices and audits.
• Excellent problem-solving and communication in a remote setting.

Responsibilities

• Design, develop, and deploy smart contracts on Ethereum, Solana, and Polygon.
• Develop and maintain core blockchain infrastructure and services.
• Collaborate with product managers and engineers to implement new features.
• Write secure, well-documented code following best practices.
• Conduct code reviews and provide constructive feedback to peers.
• Develop blockchain-based apps and dApps.
• Troubleshoot complex issues in blockchain networks and contracts.
• Stay updated on blockchain tech and crypto trends.
• Contribute to architectural decisions and technology selection.

Skills

Blockchain development

Solidity

Hardhat

Truffle

Web3.js

Distributed ledger

Cryptography

Node.js

Python

Go

Security best practices

Remote collaboration

Education

Bachelor's or Master's in CS/Engineering

Tools

Hardhat

Truffle

Web3.js

Job description

About the Role

Our client, a rapidly growing innovator in the decentralized finance (DeFi) space, is seeking a highly skilled and experienced Senior Blockchain Developer to join their fully remote team. This is a unique opportunity to work on cutting‑edge blockchain technologies and contribute to the development of next‑generation financial products. As a remote‑first organization, we foster a collaborative and agile environment where you can thrive from anywhere in the world. You will be instrumental in shaping the future of digital assets and smart contracts, working alongside a passionate and talented group of engineers and product managers. This role demands a deep understanding of blockchain protocols, smart contract development, and a commitment to delivering secure, scalable, and efficient solutions. The ideal candidate will possess a strong portfolio of previous blockchain projects and a proven track record of success in a demanding technical environment. Join us in building the infrastructure for a decentralized future.

Key Responsibilities

• Design, develop, and deploy smart contracts on various blockchain platforms (e.g., Ethereum, Solana, Polygon).
• Develop and maintain core blockchain infrastructure and services.
• Collaborate with product managers and other engineers to define and implement new features.
• Write secure, efficient, and well‑documented code, adhering to best practices.
• Conduct thorough code reviews and provide constructive feedback to peers.
• Implement and manage blockchain‑based applications and decentralized applications (dApps).
• Troubleshoot and resolve complex technical issues related to blockchain networks and smart contracts.
• Stay abreast of the latest advancements in blockchain technology and cryptocurrency trends.
• Contribute to architectural decisions and technology selection.

Requirements

• Bachelor's or Master's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
• 5+ years of professional software development experience, with at least 3 years focused on blockchain technology.
• Proficiency in smart contract development languages such as Solidity.
• Experience with popular blockchain frameworks and tools (e.g., Hardhat, Truffle, Web3.js).
• Strong understanding of cryptography, consensus algorithms, and distributed ledger technologies.
• Experience with other programming languages like Node.js, Python, or Go is a plus.
• Familiarity with security best practices for smart contract development.
• Excellent problem‑solving and analytical skills.
• Strong communication and collaboration skills, especially in a remote setting.
• Ability to work independently and manage multiple priorities effectively.

Benefits

Our client offers a highly competitive compensation package, including a significant annual salary and potential for performance‑based bonuses. As a fully remote position, you have the flexibility to work from anywhere within Johannesburg or internationally, provided you meet the required time zone overlap for collaboration. We provide comprehensive health insurance, including medical, dental, and vision coverage. Opportunities for professional development and continuous learning are abundant, with access to training programs, conferences, and educational resources. Employees also benefit from generous paid time off, retirement savings plans with company matching, and the chance to own a part of a groundbreaking company through stock options. Join a team that values innovation, collaboration, and employee well‑being, and help us shape the future of finance.