Senior Front-End Engineer

Senior Frontend Engineer About Inco Inco is building the confidentiality layer for blockchains through encryption technologies. We’re building the next generation of secure, scalable, and privacy-enhancing solutions for Web3, enabling fintech, payments, and blockchain applications to have the same confidentiality and capabilities users expect from Web2. Who You Are We’re looking for a senior frontend engineer who has built production-grade Web3 user experiences and understands the unique complexity of blockchain applications. You have strong frontend fundamentals, but you also understand that Web3 frontend engineering is not just about building interfaces. It requires safely fetching and interpreting onchain data, integrating wallets, handling signatures, managing client-side state, and designing user flows where security and correctness matter. You should be comfortable building polished, reliable UIs while also thinking deeply about how users interact with wallets, sign messages, grant permissions, manage session keys, and execute intent-based flows. You understand the security risks of asking users to sign transactions or messages, and you care about making those flows clear, safe, and difficult to misuse. We’re looking for someone senior who can own frontend architecture end-to-end, raise engineering standards, and mentor more junior engineers. You should be the type of person who can turn ambiguous product requirements into secure, elegant, production-ready user experiences. This role is remote / hybrid / based in Bangalore (preferred). Responsibilities Frontend Architecture & Development Design, build, and maintain production-grade frontend applications using modern frontend technologies. Own frontend features end-to-end, from product requirements and UX flows to implementation, testing, and deployment. Build responsive, performant, and reliable user interfaces for Web3 products. Create reusable frontend components, patterns, and architecture that allow the team to move quickly without sacrificing quality. Work closely with product, design, backend, and protocol teams to translate complex Web3 flows into intuitive user experiences. Web3 Product & Wallet Integration Build frontend experiences that integrate with wallets, smart contracts, indexers, RPC providers, and blockchain data sources. Implement flows involving transaction signing, message signing, intent signing, session keys, delegated permissions, and account abstraction. Design user experiences around balances, transaction history, onchain transactions, permissions, and Web3 payment flows. Understand how to fetch, cache, reconcile, and display onchain and offchain data safely and accurately. Handle edge cases common in Web3 applications, including pending transactions, reorgs, failed RPC calls, wallet disconnects, chain switching, stale balances, and inconsistent indexer data. Security & Correctness Ensure frontend flows are secure by default, especially when users are asked to sign messages, authorize intents, or store session keys locally. Apply best practices for client-side key management, session key storage, permission scoping, signature domain separation, and phishing-resistant UX. Work with the team to identify and prevent risks around malicious signatures, replay attacks, unsafe approvals, incorrect transaction previews, and confusing wallet prompts. Treat frontend correctness as critical infrastructure, especially when user funds or private information are involved. Leadership & Mentorship Lead technical design discussions and help define frontend architecture, standards, and best practices. Review code and mentor junior engineers on frontend quality, Web3 security, testing, and production readiness. Improve engineering velocity by building strong abstractions, documentation, and internal tooling. Take ownership of frontend quality across performance, reliability, security, accessibility, and maintainability. Required Experience 5+ years of frontend eng