Blockchain Developer (Solidity)

Placements24; Klerksdorp; Hybrid; ZAR 700,000 - 1,200,000; Full time

Benefits offered by this job

Token-based incentives

Flexible remote working arrangements

Professional development

Comprehensive benefits package

Direct impact on product development

Job summary

Placements24 is seeking a Blockchain Developer with Solidity expertise to design, develop, test, and deploy secure smart contracts for our fintech platform. The role is based in Klerksdorp, North West, with flexible remote arrangements and a collaborative startup culture.

You will build dApps, integrate with front-end interfaces and external APIs, and optimize gas usage while staying current on Ethereum/EVM developments.

Qualifications

• Bachelor's degree in CS/SE or related field.
• Minimum 3 years in software development with 2+ years in blockchain.
• Strong knowledge of EVM architecture.
• Experience with web3.js or ethers.js.
• Familiar with Hardhat, Truffle, or Foundry.
• Understanding of smart contract security patterns.

Responsibilities

• Design, develop, test, and deploy secure Solidity smart contracts.
• Build and maintain dApps and backend services.
• Integrate with front-end interfaces and external APIs.
• Participate in code reviews and feedback.
• Optimize gas efficiency and performance.
• Write unit and integration tests for contracts.
• Troubleshoot across development and production environments.
• Collaborate with product managers and designers on UX.
• Stay informed about Solidity/EVM developments.
• Contribute to technical documentation.

Skills

Solidity

DApps development

Web3 libraries

Security patterns

Git

Problem solving

Remote collaboration

Education

Bachelor's degree in CS/SE

Tools

Hardhat

Truffle

Foundry

Job description

About the Role

Our client, a forward-thinking fintech startup focused on leveraging blockchain technology for innovative financial services, is looking for a skilled Blockchain Developer specializing in Solidity. This position, based in Klerksdorp, North West, will involve the development and deployment of smart contracts and decentralized applications on the Ethereum blockchain and EVM-compatible networks. You will be an integral part of a small, agile team, contributing directly to the core product development and the expansion of our decentralized ecosystem. If you are passionate about smart contract programming and eager to make a significant impact in the world of DeFi and crypto, this is the role for you. We value creativity, technical excellence, and a collaborative spirit.

Key Responsibilities

• Design, develop, test, and deploy secure and efficient smart contracts using Solidity.
• Build and maintain decentralized applications (dApps) and related backend services.
• Integrate smart contracts with front-end interfaces and external APIs.
• Participate in code reviews, providing and receiving constructive feedback.
• Optimize smart contracts for gas efficiency and performance.
• Write comprehensive unit and integration tests for smart contract functionality.
• Troubleshoot and debug issues across the development and production environments.
• Collaborate with product managers and designers to refine user experiences and features.
• Stay informed about the latest developments in the Solidity ecosystem and EVM technology.
• Contribute to technical documentation and knowledge sharing within the team.

Requirements

• Bachelor's degree in Computer Science, Software Engineering, or a related discipline.
• Minimum of 3 years of professional experience in software development, with at least 2 years focused on blockchain development using Solidity.
• Strong understanding of Ethereum Virtual Machine (EVM) architecture and operations.
• Experience with Web3 libraries (e.g., web3.js, ethers.js).
• Familiarity with development frameworks like Hardhat, Truffle, or Foundry.
• Knowledge of common smart contract vulnerabilities and security patterns.
• Experience with version control systems like Git.
• Understanding of cryptographic principles relevant to blockchain.
• Excellent problem-solving skills and attention to detail.
• Ability to work effectively in a remote or distributed team setting.

Benefits

• Competitive salary and potential for token-based incentives.
• Opportunity to work on cutting-edge blockchain projects with real-world applications.
• Direct impact on product development and company growth.
• Collaborative and innovative startup culture.
• Support for professional development and learning.
• Flexible remote working arrangements.
• Comprehensive benefits package.
• Be a key contributor in shaping the future of decentralized finance from Klerksdorp, North West.