核心职责

• 链上协议开发： 主导去中心化交易协议的核心合约设计与部署，涵盖资金池（Vault）、清算结算中心及交易记录器等关键组件。

• 交易链路实现： 负责链上清算与结算逻辑的底层实现，并确保与链下高性能撮合引擎的高效协同。

• 预言机架构集成： 设计并维护高可靠的 Oracle 合约体系，支持实时价格喂价、数据校验及资产定价逻辑。

• 安全与审计保障： 深度参与合约安全加固，配合第三方审计机构完成代码审计，并主导合约的生产环境上线。

• 跨端协同对接： 联同后端及测试团队，完成从链下指令到链上资金划转的全链路闭环验证。

任职要求

• 专业背景： 计算机、软件工程或密码学相关专业本科及以上学历，具备扎实的计算机理论基础。

• Solidity 深度开发： 拥有 3 年以上 Solidity 实战经验，精通 EVM 机制、Gas 优化策略及各类 ERC 标准协议。

• 清结算领域专家： 具备 2 年以上 DEX 清算与结算系统开发经验，并有成熟的预言机（Oracle）集成实战案例。

• 多链开发能力： 熟练掌握 Rust 或 Move 语言，能够在中大型项目中独立主导核心合约模块的开发。

• 跨生态视野： 深入理解主流公链（如 Solana 或 Sui）的底层逻辑，熟悉高性能链上应用的开发范式。

My client is a leading Web3 and Decentralized Finance (DeFi) company and looking for a Senior Smart Contract Engineer (Solidity/Rust/Move) roles.

Core Responsibilities

• Protocol Architecture & Deployment: Architect and implement core on-chain protocols for a Decentralized Exchange (DEX), including capital vaults, clearinghouses, and settlement engines.

• On-Chain Transaction Logic: Develop the underlying logic for clearing and settlement processes, ensuring high-fidelity integration with off-chain high-performance matching engines.

• Oracle System Integration: Design and maintain robust Oracle contract frameworks to support real-time price feeds, data validation, and asset valuation.

• Security & Audit Management: Lead smart contract security hardening initiatives, collaborate with external auditors to rectify vulnerabilities, and oversee mainnet deployments.

• End-to-End Synergy: Partner with backend and QA teams to bridge the gap between off-chain trade commands and on-chain fund movements for seamless execution.

Candidate Requirements

• Academic Background: Degree in Computer Science, Software Engineering, Cryptography, or a related technical field.

• Solidity Mastery: 3+ years of professional Solidity development with deep expertise in EVM mechanics, Gas optimization techniques, and ERC standards.

• DeFi Domain Expertise: 2+ years of specialized experience in DEX clearing and settlement workflows, including sophisticated Oracle integration.

• Multi-Chain Proficiency: Proficient in Rust or Move programming, with the ability to lead contract module development across diverse blockchain ecosystems.

• Ecosystem Knowledge: Strong understanding of the architectural paradigms of high-performance chains such as Solana or Sui.

Preferred Qualifications

• Experience developing advanced vault standards (e.g., ERC-4626, ERC-7540, or ERC-7575) and complex accounting logic.

• Familiarity with advanced security methodologies, including Fuzzing or Formal Verification.

• Proven track record of successful smart contract audits or hands-on experience in incident response and protocol hardening.

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.