Senior Blockchain Developer - Smart Contracts & DeFi

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

Benefits offered by this job

Competitive salary package

Health and wellness benefits

Professional development

Career advancement

Job summary

Placements24 in Johannesburg seeks a Senior Blockchain Developer to design, develop, and deploy advanced blockchain solutions in a fast-moving crypto landscape. The role focuses on smart contracts (Solidity/Vyper/Rust), dApps, security audits, and collaboration with product teams to deliver scalable, secure infrastructure for DeFi applications.

Qualifications include a Bachelor's or Master's in CS/Engineering and 5+ years software experience with at least 3 in blockchain, plus proficiency in

Qualifications

• Bachelor's or Master's degree in Computer Science, Engineering, or a related field.
• 5+ years of software development experience, with at least 3 years in blockchain technology.
• In-depth knowledge of blockchain concepts, consensus mechanisms, and cryptography.
• Proficiency in smart contract languages such as Solidity, Vyper, or Rust.
• Experience with Ethereum, Binance Smart Chain, Polygon, or Solana.
• Familiarity with Web3 libraries (Web3.js, Ethers.js) and Git.
• Strong understanding of DeFi protocols and concepts.
• Excellent problem-solving, analytical, and debugging skills.
• Strong communication and teamwork abilities, especially in a Johannesburg context.

Responsibilities

• Design, develop, and deploy secure smart contracts for multiple platforms.
• Architect and build scalable dApps and blockchain-based systems.
• Integrate blockchain tech with existing systems and third-party services.
• Conduct code reviews, performance optimization, and security audits of protocols.
• Collaborate with product managers, designers, and engineers to implement features.
• Stay updated on blockchain tech, cryptography, and crypto trends.
• Troubleshoot complex technical issues in blockchain infra and apps.
• Mentor junior developers and promote technical excellence.

Skills

Blockchain concepts

DeFi protocols

Problem-solving

Teamwork

Education

Bachelor's or Master's in CS/Engineering

Tools

Solidity

Vyper

Rust

Web3.js

Ethers.js

Git

Ethereum

Binance Smart Chain

Polygon

Solana

Job description

About the Role

Our client, a dynamic leader in the blockchain and cryptocurrency space, is seeking a highly skilled and experienced Senior Blockchain Developer to join their innovative team. This pivotal role is based in the vibrant city of Johannesburg, Gauteng , and offers a unique opportunity to shape the future of decentralized finance (DeFi). You will be instrumental in designing, developing, and deploying cutting-edge blockchain solutions that drive innovation and provide tangible value to users. This position is perfect for a forward-thinking individual passionate about distributed ledger technology, smart contracts, and the burgeoning crypto economy. The role involves working within a collaborative environment, contributing to the architectural decisions, and ensuring the highest standards of code quality and security.

Key Responsibilities

• Design, develop, and deploy secure and efficient smart contracts (e.g., Solidity) for various blockchain platforms.
• Architect and build scalable decentralized applications (dApps) and blockchain-based systems.
• Integrate blockchain technologies with existing systems and third-party services.
• Conduct thorough code reviews, performance optimization, and security audits of blockchain protocols and smart contracts.
• Collaborate with product managers, designers, and other engineers to define and implement new features.
• Stay abreast of the latest advancements in blockchain technology, cryptography, and cryptocurrency trends.
• Troubleshoot and resolve complex technical issues related to blockchain infrastructure and applications.
• Mentor junior developers and contribute to a culture of technical excellence.

Requirements

• Bachelor's or Master's degree in Computer Science, Engineering, or a related field.
• Proven 5+ years of experience in software development, with at least 3 years focused on blockchain technology.
• In-depth knowledge of blockchain concepts, consensus mechanisms, and cryptography.
• Proficiency in smart contract development languages such as Solidity, Vyper, or Rust.
• Experience with popular blockchain platforms like Ethereum, Binance Smart Chain, Polygon, or Solana.
• Familiarity with Web3 libraries and frameworks (e.g., Web3.js, Ethers.js).
• Strong understanding of decentralized finance (DeFi) protocols and concepts.
• Excellent problem-solving, analytical, and debugging skills.
• Strong communication and teamwork abilities, especially in a Johannesburg context.
• Experience with version control systems like Git.

Benefits

• Competitive salary package commensurate with experience.
• Opportunity to work on groundbreaking projects in the rapidly evolving crypto and blockchain industry.
• Comprehensive health and wellness benefits.
• Professional development and continuous learning opportunities.
• A dynamic and inclusive work environment in Johannesburg .
• Potential for career advancement within a growing company.
• Exposure to global blockchain communities and events.