Senior Web3 Software Engineer job opportunity at MLabs.

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Date2026-03-06T15:50:45.530Z bot
MLabs Senior Web3 Software Engineer
Experience: 5-years
Pattern: full-time
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Brazil

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.

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