Senior Full-Stack Blockchain Engineer

Placements24; Pretoria; Hybrid; ZAR 1,000,000 - 1,800,000; Full time

Benefits offered by this job

Health benefits

Retirement plan

Professional development budget

Hybrid work model

Career advancement

Job summary

Placements24, a Pretoria-based fintech, is seeking a Senior Full-Stack Blockchain Engineer to bridge on-chain and off-chain systems, design scalable dApps, and help secure smart contracts that power modern financial products.

You will develop front-end interfaces with React, Angular, or Vue, build back-end services in Node.js or Python/Go, integrate Web3 and RESTful APIs, and write comprehensive tests across units and integrations.

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• 5+ years of full-stack development experience.
• Proven blockchain development experience, Solidity and Web3.
• Strong front-end proficiency with React, Angular, or Vue.js.
• Back-end experience with Node.js, Python/Django, or Go.
• Familiarity with RESTful APIs and microservices.
• Experience with testing frameworks (Jest, Mocha, Hardhat) and Git.
• Excellent problem-solving and communication skills.

Responsibilities

• Develop and deploy smart contracts on relevant blockchain platforms.
• Design scalable back-end services that interact with blockchain networks.
• Build intuitive, responsive UIs for decentralized apps (dApps).
• Integrate front-end with smart contracts and back-end APIs.
• Write robust unit, integration, and end-to-end tests.
• Optimize performance, security, and gas efficiency.
• Collaborate with product, design, and engineering teams.
• Participate in code reviews and architectural discussions.
• Troubleshoot complex issues across the full stack.
• Stay updated with blockchain and web development advancements.

Skills

Full-stack development

Blockchain development

Web3 integration

Front-end frameworks

Back-end languages

APIs & microservices

Testing & QA

Git & version control

Problem solving

Team collaboration

Education

Bachelor's degree in CS/SE or related

Tools

Git

Jest/Mocha/Hardhat

Job description

About the Role

Our client is a pioneering fintech company developing innovative blockchain-based financial solutions. They are looking for a Senior Full-Stack Blockchain Engineer to join their growing technology hub in Pretoria, Gauteng . This role requires a versatile engineer capable of bridging the gap between blockchain back-end development and user-facing applications. You will be instrumental in designing, building, and maintaining both the on-chain logic and the front-end interfaces of our client's decentralized platforms. This is an exciting opportunity to work on challenging projects at the intersection of finance and distributed ledger technology, contributing to the development of secure and efficient financial products. The hybrid work model allows for a blend of collaborative office time and focused remote work, promoting a healthy work-life balance.

Key Responsibilities

• Develop and deploy smart contracts on relevant blockchain platforms.
• Design and implement scalable back-end services that interact with blockchain networks.
• Build intuitive and responsive user interfaces for decentralized applications (dApps).
• Integrate front-end components with smart contracts and back-end APIs.
• Write robust unit, integration, and end-to-end tests for both on-chain and off-chain components.
• Optimize application performance, security, and gas efficiency.
• Collaborate closely with product managers, designers, and other engineers to define and deliver features.
• Participate in code reviews and contribute to architectural discussions.
• Troubleshoot and resolve complex technical issues across the full stack.
• Stay updated with the latest advancements in blockchain technology, web development frameworks, and security practices.

Requirements

• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• 5+ years of professional experience in full-stack development.
• Proven experience with blockchain development, including smart contract languages (e.g., Solidity) and Web3 integration.
• Strong proficiency in front-end technologies such as React, Angular, or Vue.js.
• Experience with back-end development languages and frameworks (e.g., Node.js, Python/Django, Go).
• Familiarity with RESTful APIs and microservices architecture.
• Understanding of blockchain fundamentals, consensus mechanisms, and cryptography.
• Experience with testing frameworks (e.g., Jest, Mocha, Hardhat) and version control (Git).
• Excellent problem-solving, debugging, and analytical skills.
• Strong communication and teamwork abilities.

Benefits

Our client offers a competitive salary, comprehensive health benefits, performance bonuses, and retirement plan options. Employees benefit from a professional development budget for conferences, courses, and certifications. The hybrid work arrangement in our Pretoria office provides flexibility, allowing for a balance between in-office collaboration and remote autonomy. You will be part of an innovative and fast-paced environment, working with cutting-edge technology and contributing to impactful financial solutions. Opportunities for career advancement within the company are abundant.