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Senior Web3 Software Engineer at MLabs. Senior Web3 Software Engineer. Location: . Europe/US/Latam. Remote | Full-time. Compensation: . $170K - $195K. Our client is a pioneer in the blockchain sector, developing a high-performance operating system designed to redefine scalability and throughput for Ethereum. By combining parallel transaction execution with advanced state minimization, our client’s platform overcomes traditional protocol limitations to provide a groundbreaking environment for decentralized development.. Since its initial launch in 2019, the organization has remained dedicated to enhancing Ethereum's ecosystem through technical innovation, including the creation of a bespoke virtual machine and a specialized programming language. The team is a globally dispersed group of innovators committed to shaping the future of blockchain technology through secure, decentralized, and high-throughput solutions.. Our client is seeking a . Senior Web3 Software Engineer. to lead the development of high-performance decentralized applications (dapps). This individual will own major product surfaces end-to-end—from frontend interfaces to on-chain integrations—collaborating across product, design, and smart contract teams to deliver secure and intuitive experiences for traders and users.. Key Responsibilities. Dapp Development:. Design, build, and maintain modern, responsive frontend applications integrated with blockchain protocols for core DeFi products and exchanges.. Protocol Integration:. Implement integrations with blockchain infrastructure (e.g., EVM chains, custom VMs), wallet extensions (MetaMask, Phantom, WalletConnect), and on-chain data sources such as subgraphs and indexers.. Security & User Flow:. Execute secure user flows for transactions, multi-sig approvals, cross-chain bridging, and account abstraction.. Infrastructure Collaboration:. Contribute to API design (REST/GraphQL), RPC optimization, and indexer queries to ensure high-performance, real-time data delivery.. Technical Leadership:. Establish frontend architecture, design systems, and Web3 best practices, including gas optimization, reentrancy guards, and accessibility.. Mentorship & Code Quality:. Perform rigorous code reviews (including Solidity/Sway), mentor engineering staff, and drive strategic decisions regarding stack interoperability and scalability.. UX Optimization:. Translate complex DeFi requirements, such as MEV protection and oracle feeds, into intuitive UI/UX for professional trading interfaces.. Roadmap Strategy:. Proactively identify technical debt, propose infrastructure upgrades, and technically shape the product roadmap.. Interview Process. Hiring Manager Interview:. Initial alignment on experience and role expectations.. Technical Interview I:. Assessment of core engineering skills and Web3 proficiency.. Technical Interview II:. Deep dive into architecture, security, and specialized DeFi knowledge.. Final Interview:. Comprehensive evaluation of leadership qualities and cultural fit.. Professional Experience:. 5+ years of software engineering experience, with at least 2 years in a senior or lead capacity specifically building Web3 or blockchain applications.. Frontend Expertise:. Deep proficiency in modern frameworks (React, Next.js, or Vue) using TypeScript/JavaScript, alongside Web3 libraries (ethers.js, viem, wagmi).. Dapp Specialization:. Strong experience developing complex, data-intensive dapps that handle real-time streams, such as order books or AMM curves.. On-Chain Interaction:. Proven ability to manage browser wallet connections and execute on-chain interactions via providers (Alchemy, Infura) and libraries for reads, writes, and calls.. Security Literacy:. A solid grasp of Web3 security principles, including private key management, blind signing risks, and mitigation of sandwich attacks or phishing.. Full-Stack Awareness:. Experience with Node services (Express, FastAPI), off-chain indexers (The Graph), and event listening mechanisms.. Data Management:. Proficiency in REST/GraphQL, data fetching (SWR, TanStack Query), and state management (Zustand, Redux) within volatile market contexts.. Preferred Qualifications. Previous experience at a Centralized (CEX) or Decentralized Exchange (DEX).. Experience building trading UIs featuring order books, candlestick charts, and PnL calculators.. Performance tuning for high-throughput DeFi applications (sub-ms latency, WebSockets).. Prior work in fintech or DeFi involving tokenomics or audited protocols.. Company Location: Brazil.