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 ResponsibilitiesFull-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.
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.
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.
Skills Required
- 8+ years professional QA experience with cross-platform testing (PC, H5, Mobile)
- 3+ years testing Exchange platforms (DEX/CEX), including matching engines and settlement logic
- Mastery testing smart contracts across at least two ecosystems (EVM/Solidity, Sui/Move, Solana/Rust)
- Proficiency with Hardhat, Foundry, or Truffle for white-box contract testing
- Experience testing Chainlink Oracle integrations, WalletConnect, and Web3 providers
- Proven ability to implement end-to-end automation spanning UI, API, and on-chain interactions
- Familiarity validating exchange risk control systems and complex risk parameters
- Experience with ERC-4626, AMM, Order Book architectures or other protocol standards
- Familiarity with smart contract security audits and common vulnerabilities (Reentrancy, Overflows, Access Control)
- Experience with fuzzing tools (Echidna, Foundry invariant testing) or formal verification
What We Do
Hyphen Connect is a Web3 and AI talent agency and crypto-integrated software solutions provider that connects blockchain, DeFi, NFT, and AI companies with specialized technical and go-to-market talent globally and remotely. They deliver headhunting, data-driven research, and recruitment services across infrastructure, exchanges, gaming, and DeFi projects, plus industry analysis and hiring insights to help clients build engineering and product teams.
