15 Crypto & Blockchain jobs in South Africa

Position Summary: The Senior Blockchain Developer will play a key role in leading the design, development, and deployment of blockchain solutions. You will work closely with our team of developers, architects, and engineers to design and implement scalable and secure blockchain applications. This role requires deep expertise in blockchain technology, smart contract development, and decentralized application (DApp) development. The ideal candidate is a creative problem-solver with a passion for blockchain technology and a track record of delivering high-quality solutions.

Key Responsibilities:

• Lead the design, development, and implementation of blockchain-based solutions using industry-standard protocols and frameworks.
• Architect and develop smart contracts and decentralized applications (DApps) on blockchain platforms such as Ethereum, Hyperledger Fabric, or Binance Smart Chain.
• Design and implement scalable and secure blockchain architectures, including consensus mechanisms, cryptographic techniques, and security protocols.
• Conduct code reviews, testing, and debugging to ensure the quality, reliability, and security of blockchain applications.
• Collaborate with cross-functional teams to integrate blockchain solutions into existing systems and applications.
• Stay up-to-date with the latest developments in blockchain technology, industry trends, and emerging use cases.
• Provide technical leadership and mentorship to junior developers, guiding them in best practices and methodologies.
• Contribute to the documentation, tutorials, and educational materials to support the adoption of blockchain technology.

Qualifications:

• Bachelor's or master's degree in Computer Science, Information Technology, or a related field.
• 5+ years of experience in software development, with at least 3 years of experience in blockchain development roles.
• Deep understanding of blockchain concepts, protocols, and frameworks.
• Experience with blockchain platforms such as Ethereum, Hyperledger Fabric, or Binance Smart Chain.
• Proficiency in smart contract development and decentralized application (DApp) development.
• Strong analytical and problem-solving skills, with a keen attention to detail.
• Excellent communication and collaboration skills, with the ability to work effectively in a team environment.
• Proven track record of delivering high-quality blockchain solutions in a fast-paced and dynamic environment.

Join to apply for the Backend Developer - Blockchain Integrations (100% remote) role at Tether.io .

About the Job

The Wallet Development Kit (WDK) Software Engineer contributes to Tether's open-source toolkit for building self-custodial wallet applications across mobile and desktop platforms. This position involves technical design, implementation, and collaboration with other teams to advance the toolkit's capabilities. Prior experience with wallet creation or in DeFi is beneficial.

Responsibilities

• Develop innovative solutions using agile methodologies and cutting-edge technologies.
• Ensure backend services are scalable, responsive, and real-time to support platform growth.
• Maintain high security standards to protect user assets and data.
• Utilize +5 years of experience with Node.js and JavaScript.
• Build or integrate crypto wallets for DeFi and blockchain applications.
• Design modular architectures for scalable applications.
• Develop complex platforms and APIs.
• Understand Peer-to-Peer technologies.
• Adapt quickly to new technologies.
• Implement best security practices.

Nice to have

• Experience with high-availability systems.
• Knowledge of Go, Rust, or C++.
• Familiarity with message queues (Redis), caches, and job queues.
• Experience in React Native, Flutter, or native mobile development.

Important information for candidates

Be cautious of scams: apply only through official channels, verify recruiter identities, and be wary of unusual communication or requests for payment.

For inquiries, contact us via our official website.

• Seniority level: Not Applicable
• Employment type: Full-time
• Job function: Information Technology
• Industries: Technology, Information and Internet

Join Tether and Shape the Future of Digital Finance

At Tether, we’re not just building products; we’re pioneering a global financial revolution. Our solutions enable seamless integration of reserve-backed tokens across blockchains for businesses such as exchanges, wallets, payment processors, and ATMs. By leveraging blockchain technology, Tether allows you to store, send, and receive digital tokens instantly, securely, and globally, at a fraction of the cost. Transparency is fundamental to our operations, ensuring trust in every transaction.

Innovate with Tether

Tether Finance: Our product suite includes the world’s most trusted stablecoin, USDT, used by hundreds of millions worldwide, along with digital asset tokenization services.

And that’s just the beginning:

Tether Power: Focused on sustainable growth, our energy solutions optimize excess power for eco-friendly Bitcoin mining in geo-diverse facilities.

Tether Data: Supporting AI and peer-to-peer tech, we reduce infrastructure costs and improve global communication with solutions like KEET, our flagship app for secure, private data sharing.

Tether Education: Making digital learning accessible, empowering individuals to thrive in digital and gig economies, and fostering global growth.

Tether Evolution: At the crossroads of technology and human potential, we push boundaries to create a future where innovation and human capabilities merge seamlessly.

Why Join Us?

Our team is a global talent hub, working remotely worldwide. If you’re passionate about fintech innovation, this is your chance to collaborate with top minds, push boundaries, and set industry standards. We’ve grown rapidly, maintained agility, and established industry leadership.

If you have excellent English communication skills and want to contribute to the most innovative platform on Earth, Tether is for you.

Ready to shape the future?

About the job

The Wallet Development Kit (WDK) Software Engineer develops Tether's open-source toolkit for self-custodial wallet applications across mobile and desktop platforms. This role involves designing, implementing, and collaborating with teams to enhance the toolkit’s capabilities. Experience with wallet creation or DeFi is a plus.

Responsibilities

Innovative Solutions: Contribute to groundbreaking projects using agile methods and new technologies.

Scalability: Ensure backend services are responsive and real-time, supporting growth and user demands.

Security: Maintain high security standards to protect user assets and data.

Expertise in Node.js and JavaScript: +5 years of experience.

Experience with crypto wallets for DeFi and blockchain apps.

Modular Architecture: Familiarity with scalable application design.

Complex Platform Development: Proven experience in developing complex platforms and APIs.

Peer-to-Peer Technologies: Understanding of P2P tech.

Quick Learner: Ability to adapt swiftly to new technologies.

Security Awareness: Strong grasp of security best practices.

Nice to have

High-Availability: Experience with system reliability practices.

Additional Skills: Knowledge of Go, Rust, or C++ is advantageous.

Experience with message queues (Redis), caches, and job queues.

Mobile Development: Experience with React Native, Flutter, or native mobile platforms.

Important Information for Candidates

Beware of scams: Apply only via our official channels listed on our careers page . Verify recruiters’ identities through verified LinkedIn profiles. All official communication will come from @tether.to or @tether.io emails. We will never ask for payments or financial info. Contact us through our official website if unsure.

As a Crypto Investment Analyst at Token Metrics, you will play a crucial role in identifying and evaluating emerging cryptocurrencies and Web3 projects with the potential for exponential returns. You will delve deep into the market to uncover hidden gems and develop contrarian investment theses that challenge conventional wisdom. Your work will directly influence our investment strategies and contribute to our mission of maximizing ROI for our clients.

• Early-Stage Project Identification: Scout for early-stage crypto and Web3 projects that exhibit potential for 100x ROI, focusing on those not yet in the mainstream spotlight.
• In-depth Analysis and Hypothesis Development: Conduct comprehensive analyses to form and present non-consensus hypotheses about the potential of selected projects, focusing on market demand, innovation, scalability, adoption potential, and team execution capabilities.
• Investment Memo Preparation: Compile detailed investment memos that articulate your hypothesis, supporting analysis, ROI projections, and risk assessment strategies in a concise and compelling format.
• Pitch Presentation: Develop and present persuasive pitches to the investment committee, highlighting your unique insights and defending your investment thesis against critical evaluation.
• Market Research: Stay abreast of the latest trends, technologies, and regulatory changes in the crypto and blockchain landscape to inform investment decisions.
• Collaboration: Work closely with the investment team to refine investment strategies and contribute to the firm's overall investment portfolio performance.

• Experience: 2+ years of experience in investment analysis, preferably within the crypto, blockchain, or fintech sectors.
• Analytical Skills: Exceptional ability to conduct detailed market research, financial analysis, and project evaluation. Proficiency in using analytics tools and platforms to gather and interpret data.
• Knowledge of Crypto and Blockchain: Deep understanding of cryptocurrency markets, blockchain technology, and emerging Web3 innovations. Familiarity with technical and market factors affecting project scalability and adoption.
• Communication Skills: Excellent written and verbal communication skills, with the ability to articulate complex investment theses clearly and persuasively. Proficiency in creating high-quality investment memos and presentations.
• Critical Thinking: Strong analytical and critical thinking skills, with a knack for developing contrarian viewpoints and uncovering untapped investment opportunities.
• Educational Background: Bachelor’s degree in Finance, Economics, Business, Computer Science, or a related field. Advanced degrees or certifications in finance, blockchain, or cryptocurrency investments are a plus.

• Self-motivated: Entrepreneurial mindset with a strong sense of ownership and determination to get things done independently.
• Analytical: Strong analytical and financial analysis skills; an ability to quickly comprehend, evaluate, and critique new ideas and data. You are also comfortable with challenging viewpoints.
• Passionate: Passionate about the crypto-asset industry and investing. We want people who are eager and will work hard to up-skill and improve their knowledge in the crypto space
• Knowledge of Crypto: Especially DAO’s and Middleware
• Strong communicator: Good written and oral communication skills in English.
• Self-organized in a remote-first work environment
• Be willing to specialize in the Web 3 Vertical

About Token Metrics

Token Metrics helps crypto investors build profitable portfolios using artificial intelligence-based crypto indices, rankings, and price predictions.

Token Metrics has a diverse set of customers, from retail investors and traders to crypto fund managers, in more than 50 countries.

Join to apply for the Smart Contract Engineer (3-month contract) role at Linum Labs

1 day ago Be among the first 25 applicants

Join to apply for the Smart Contract Engineer (3-month contract) role at Linum Labs

This range is provided by Linum Labs. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

$72,000.00/yr - $90,000.00/yr

At Linum Labs, we don’t just build blockchain products—we shape what’s next in Web3. From launching DeFi platforms to architecting DAOs and spinning up bold experiments in our Venture Studio, we live on the frontier of innovation.

Now we’re looking for a Senior Smart Contract Engineer ready to dive deep and deliver. If you ship fast, write secure and gas-optimized Solidity, and know how to build modular systems that scale—keep reading.

This is a full-time, 3-month contract (with a possibility of extension).

High autonomy. High impact. Real projects that matter.

What We’re Looking For

This role isn’t background support work—it’s core smart contract engineering on high-stakes, high-impact Web3 products. You’ll be fully embedded in our project team, working alongside product, design, and technical leads to ship features that actually move the needle.

We’re looking for someone who can contribute from day one—writing clean, secure, gas-optimized Solidity, owning architecture decisions, and collaborating across the stack to bring ambitious ideas to life.

️ What You’ll Be Doing

• Writing secure, gas-efficient smart contracts in Solidity
• Architecting clean, modular smart contract systems
• Collaborating cross-functionally to turn specs into shipped features
• Building and maintaining off-chain tools for testing and deployment
• Working async and independently, while staying aligned with a fast-moving team
  
  

• 5+ years of software engineering experience
• 3+ years of Solidity experience, with production deployments
• History of integrating with AMMs and building lending protocols
• Proficient in Foundry (or comfortable ramping up quickly)
• Deep understanding of Ethereum smart contract design and security
• Experience shipping smart contracts to mainnet
  
  

• Smart contract auditing experience
• Familiarity with Rust or other blockchain frameworks
• Experience with staking protocols, rollups, or governance mechanisms
• Comfortable with remote collaboration tools: Slack, Notion, GitHub
  
  

• 100% remote work
• Opportunities to work on real, high-visibility products that ship
• A fast-moving, zero-bureaucracy environment where you can focus on building
  
  

• Culture Chat – Meet the team and see if the vibe clicks
• Technical Assessment – Show us your skills
• Technical Deep Dive – Talk systems, architecture, and security
• Final Interview – Align with leadership on goals and direction
  
  

• No hand-holding. You take ownership, solve problems, and ship with confidence.
• Creative & technical. You think like a builder and design like an engineer.
• Always learning. Web3 moves fast—and so do you.
• Team-first. You play well with others, even if you're working solo.
  
  

• Seniority level Mid-Senior level

• Employment type Contract

• Job function Engineering and Information Technology
• Industries IT Services and IT Consulting

Referrals increase your chances of interviewing at Linum Labs by 2x

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We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.

Keyrock Cape Town, Western Cape, South Africa

Join to apply for the Digital Assets Trader - Market Making (UK/EU Remote) role at Keyrock

Keyrock Cape Town, Western Cape, South Africa

Join to apply for the Digital Assets Trader - Market Making (UK/EU Remote) role at Keyrock

About Keyrock

Since our beginnings in 2017, we've grown to be a leading change-maker in the digital asset space, renowned for our partnerships and innovation.

About Keyrock

Since our beginnings in 2017, we've grown to be a leading change-maker in the digital asset space, renowned for our partnerships and innovation.

Today, we rock with over 180 team members around the world. Our diverse team hails from 42 nationalities, with backgrounds ranging from DeFi natives to PhDs. Predominantly remote, we have hubs in London, Brussels, Singapore and Paris, and host regular online and offline hangouts to keep the crew tight.

We are trading on more than 80 exchanges, and working with a wide array of asset issuers. As a well-established market maker, our distinctive expertise led us to expand rapidly. Today, our services span market making, options trading, high-frequency trading, OTC, and DeFi trading desks.

But we’re more than a service provider. We’re an initiator. We're pioneers in adopting the Rust Development language for our algorithmic trading, and champions of its use in the industry. We support the growth of Web3 startups through our Accelerator Program. We upgrade ecosystems by injecting liquidity into promising DeFi, RWA, and NFT protocols. And we push the industry's progress with our research and governance initiatives.

At Keyrock, we're not just envisioning the future of digital assets. We're actively building it.

Mission statement

What we are looking for… a Digital Assets Trader for the EU Time zone, supporting our core Algorithmic Trading Business, primarily across our ALT Coin clients.

Job Description

• Supporting the deployment of new algorithms, clients and markets
• Keeping a global updated view of all algorithmic trading operations
• Trade execution across crypto spot, perpetuals and options; and hedging both crypto and FX related exposure.
• Trading operations including asset rebalancing across multiple CEXs and DEXs; and facilitating settlement of assets against several trading counterparties.
• Preventative actions by spread adaptations and configuring conditions, pricing and exposure thresholds on algorithmic trading bots.
• Monitoring closely client service level agreements are met and evaluating trading performance using internal, exchange and on-chain data.
• Keeping track of the treasury, and liaising with the finance team on accounting for asset balances across operations.
• Keeping track of and reporting technical and financial problems and providing support to the dev team for improvement.
• Acting as a point of call internally on trading and market related insights.
• Liaising with the Commercial team to provide insights to market making clients on trading performance and service level agreement requirements.
  
  

• 2-3+ years of cryptocurrency trading experience across CEXes and DEXes either on a professional basis or with clear demonstrable evidence of trading a personal portfolio to a high level
• Exposure to and an understanding of key tradfi asset classes e.g., options, futures, FX either from a previous role or educational background.
  
  

• Strong analytical ability
• Fully comfortable with trading and order books
• Able to act and to take decisions under pressure
• Digital native
• Understanding of digital assets and blockchain technologies (particularly CEXes and DEXes)
• Understanding of financial market structure
• Strong attention to details
• Adaptable and a strong team player
• Basic coding skills or ability to review queries and code in SQL and at least basic working knowledge of Python.
• Good communicator
• Fluent in English
  
  

• A competitive salary package
• Autonomy in your time management thanks to flexible working hours and the opportunity to work remotely
• The freedom to create your own entrepreneurial experience by being part of a team of people in search of excellence
  
  

• Seniority level Entry level

• Employment type Full-time

• Job function Finance and Sales

Referrals increase your chances of interviewing at Keyrock by 2x

We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.

This role will meet the business needs to comply with onboarding obligations onmatters involving digital assets and web3 protocols (including to meetrequirements of VASP licence applications) and support the forensic andinvestigations team with blockchain tracing by operating relevant digital assettracing software, to complete screening checks and asset tracing exercises.

MAIN RESPONSIBILITIES AND DUTIES

• Digital asset investigations including blockchain tracing analysis and sanctions screening.
• Blockchain review, analytics, analysis and assisting with preparation of reports.
• Set up systems for digital asset investigations including software licensing and outsourcing.
• Operate relevant software.
• Assistance with onboarding clients, compliance and enhanced due diligence checks, eDiscovery, corporate intelligence and/or general fraud and misappropriation investigations or other tasks as appropriate to experience.

ESSENTIAL REQUIREMENTS

• Demonstrable knowledge of Web3 ecosystem with proven experience with crypto and digital assets.
• Certified Cryptocurrency investigator or equivalent qualification.
• Another relevant qualification eg. CFA, CFE, ACEDs, ACAMs, and/or bachelor’s degree or higher and/or web3/digital asset programming experience.
• 3-5 years’ relevant PQE.
• Experience using relevant tracing software such as Elliptic or Chainalysis reactor, ideally with experience using software for tracing (related to fraud/misappropriation).
• Ideally with knowledge in solidity language and smart contracts on ETH, SOL, and other blockchains.
• Solid written, IT systems and numeric skills.

Whether you are just starting out or seeking new challenges, JTC offers an environment where you can grow, develop, and succeed at every stage of your career.

Stay up to date with expert insights, latest updates and exclusive content.

Token Metrics is a cryptocurrency investment research platform that’s driven by machine learning and artificial intelligence. The company was founded by Ian Balina in 2017 as he traded his way from $20,000 to more than $5 million, logging all his trades in a public-facing spreadsheet that drew more than a million unique visitors per month. Ian’s Moneyball-style approach to crypto investing now forms the basis of the Token Metrics platform, which now helps thousands of customers around the world profitably play the crypto markets.

Token Metrics is seeking a highly skilled and enthusiastic Developer Relations Engineer to join our dynamic team. This role combines expertise in blockchain technology, artificial intelligence, and developer community engagement.

• Serve as the primary liaison between Token Metrics and the developer community, fostering strong relationships and driving adoption of our platform
• Create comprehensive technical documentation, tutorials, and sample code to support developers using our tools and APIs
• Develop and deliver engaging presentations, workshops, and webinars on Token Metrics' technology and its applications in the crypto and AI space
• Collaborate with the product and engineering teams to gather developer feedback and influence product roadmap
• Actively participate in blockchain and AI conferences, hackathons, and online forums to promote Token Metrics and stay abreast of industry trends
• Build and maintain demo projects showcasing the capabilities of Token Metrics' platform, with a focus on integrating AI and blockchain technologies

• Proven experience in developer relations, technical evangelism, or a similar role within the blockchain or AI industry
• Strong programming skills in TypeScript, Python, Solidity, and Rust
• Hands-on experience with the ai16z framework for building AI agents
• Excellent verbal and written communication skills, with the ability to explain complex technical concepts to diverse audiences
• Deep understanding of blockchain technology, cryptocurrencies, and decentralized applications
• Familiarity with AI and machine learning concepts, particularly in their application to the crypto space
• Bachelor's degree in Computer Science, Software Engineering, or a related field
• Passion for emerging technologies and ability to quickly learn and adapt to new tools and frameworks

• Experience contributing to open-source projects in the blockchain or AI domains
• Knowledge of token economics and DeFi protocols
• Previous work with large language models and AI agents
• Track record of creating developer-focused content (blog posts, videos, podcasts)

Token Metrics is a leading platform in the cryptocurrency space, providing advanced analytics and insights to empower investors and traders. We are committed to delivering high-quality, secure, and user-friendly SaaS solutions. We are seeking a dedicated Crypto QA Engineer who is deeply immersed in the crypto ecosystem and passionate about ensuring the reliability and security of our products.

1. Develop and Execute Test Strategies: Create and implement comprehensive test plans and test cases for our SaaS applications and APIs, focusing on functionality, security, and performance.
2. Automate Testing Workflows: Utilize tools to automate testing processes and enhance efficiency.