QA Engineer, Backend
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Requirements
• Work with Docker, Kubernetes, and CI/CD pipelines to ensure seamless QA environments • Prior QA experience in fintech, DeFi, or crypto projects • Enterprise-oriented mindset with a focus on structure, scalability, and quality • Comfortable working in a Scrum-based, agile environment • Strong sense of ownership and proactive communication in distributed teams • Experienced in testing systems that interact with Ethereum nodes (e.g., Geth, Infura) • Automated testing tools in Web3 (e.g., Hardhat, Foundry, Chai, Mocha) • Integration of De-Fi Protocols into backend systems • Proficient in testing micro-services architectures and asynchronous systems using message brokers like Kafka or NATS • Familiarity with DeFi primitives (e.g., Uniswap v2/v3, Compound, Aave, Curve)
Responsibilities
• Designing, developing, and maintaining automated test suites for APIs, backend services, and smart contract interactions. • Implementing integration, regression, and end-to-end testing strategies for DeFi components. • Creating mocks/stubs for Web3 environments, token behaviours, and smart contract logic to ensure thorough code coverage using static and dynamic analysis tools. • Validating the integration of new DeFi protocols (e.g., AMMs, lending markets) into backend systems. • Analysing and simulating economic behaviours, such as slippage, liquidity depth, and oracle responses. • Testing token standards (ERC20, ERC721, etc.) and smart contract edge cases. • Performing load and stress testing on backend systems that interact with blockchain nodes, while also monitoring latency and transaction throughput. • Identifying performance bottlenecks and working with engineering teams to address them. • Collaborating with the backend team to identify and reproduce issues. • Utilising tools such as Hardhat, Foundry, Tenderly, and The Graph for contract and protocol validation.
Benefits
• We’re open to new ideas — if you’ve got a vision, pitch it and make it happen • Enjoy competitive pay that matches your skills and experience • Be part of a company that’s shaping the future of DeFi • Take time when you need it — we offer unlimited vacation days • Get fully compensated for your work gear — we’ll set you up for success