Senior QA Engineer (Smart Contract Testing/DEX) at Hyphen Connect Limited

Shenzhen, Guangdong, China -

Full Time

Start Date

Immediate

Expiry Date

27 May, 26

Salary

0.0

Posted On

26 Feb, 26

Experience

10 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

Smart Contract Testing, DEX, White-Box Testing, Full-Stack Testing, UAT, Performance Testing, Security Assessments, Solidity, Move, Rust, Hardhat, Foundry, Web3 Integration, Automation, Risk Management, EVM

Industry

Staffing and Recruiting

Description

We are seeking a highly technical Senior QA Engineer to spearhead the quality assurance strategy for our client - Decentralized Exchange (DEX). This role focuses on the intersection of traditional exchange mechanics and blockchain technology, requiring a candidate who can perform deep white-box testing on smart contracts while ensuring the reliability of the entire trading lifecycle. Key Responsibilities Full-Stack Testing: Lead end-to-end testing for DEX/CEX platforms, encompassing functional integration, User Acceptance Testing (UAT), performance/stress testing, and security assessments. Smart Contract White-Box Testing: Conduct rigorous unit and integration testing for core on-chain components, including Vaults, Clearinghouses, Settlement engines, and Oracles. Framework Architecture: Build and maintain scalable automated testing frameworks using industry-standard tools like Hardhat and Foundry. Release Management: Oversee production environment deployment verification, regression testing, and final launch acceptance to ensure zero-defect deployments. Collaborative Design: Actively participate in requirements review and test design alongside Developers and Product Managers to bake quality into the development lifecycle. Required Qualifications & Skills Experience: 8+ years of professional QA experience with a deep understanding of cross-platform testing (PC, H5, and Mobile). Domain Expertise: 3+ years of specific experience in Exchange (DEX/CEX) testing, with a thorough grasp of matching engines, clearing/settlement, and asset flow logic. Blockchain Proficiency: Mastery of smart contract testing across at least two major ecosystems: EVM (Solidity), Sui (Move), or Solana (Rust/Anchor). Technical Toolkit: Proficient in Hardhat, Foundry, or Truffle for comprehensive white-box testing of contract source code. Web3 Integration: Skilled in testing Chainlink Oracle integrations, WalletConnect, and Web3 Providers. Automation Mastery: Proven ability to implement end-to-end automation spanning UI, API, and on-chain interactions. Risk Management: Familiarity with exchange risk control systems and experience validating complex risk parameters. Preferred Attributes (Bonus) Protocol Knowledge: Experience testing specific standards and architectures such as ERC-4626 (Yield-bearing vaults), ERC-7540/7575, AMM (Automated Market Makers), or Order Book contracts. Security Mindset: Familiarity with smart contract security audits and common vulnerabilities (Reentrancy, Arithmetic Overflows, Access Control). Advanced Methodology: Experience with Fuzzing (e.g., Echidna, Foundry invariant testing) or Formal Verification.

Responsibilities

This role involves leading the quality assurance strategy for a Decentralized Exchange (DEX), focusing on end-to-end testing across the trading lifecycle, including functional integration, performance, and security assessments. A key focus is conducting rigorous white-box testing on core on-chain components like Vaults, Clearinghouses, and Oracles.