Senior Front-End Engineer

Inco Network

IndiaremotePosted 2 days ago

Skill Required

Frontend-EngineerWeb3-EngineerReact-DeveloperFront-End-DeveloperUI-EngineerSenior-Frontend-EngineeringFront-End-Software-EngineerSenior-Front-End-DeveloperSenior-Frontend-DevelopmentSenior-Frontend-ArchitectSenior-Frontend-Engineer-(Angular)Senior-Frontend-React-DeveloperSenior-UI-EngineerFrontend DeveloperSolidityDesign SystemMetaMaskWeb AccessibilityEngineeringTypeScriptBlockchainCryptographyWeb3.jsdesigningNext.jsTailwindsecuritybuildingfintechTestNGdesignReactDeFiAPIsUnityandFulltime

Key highlights

5+ years of frontend engineering experience required
Strong expertise in TypeScript, React, and modern frontend development required
Must have experience building Web3, crypto, wallet, DeFi, payments, or blockchain-related frontend products
Experience with viem, wagmi, ethers.js, WalletConnect, RainbowKit, or similar required
Remote / hybrid / Bangalore (preferred) work location
Role involves mentoring junior engineers and owning frontend architecture end-to-end

Role overview

Inco is building the confidentiality layer for blockchains through encryption technologies, creating next-generation secure, scalable, and privacy-enhancing solutions for Web3 so that fintech, payments, and blockchain applications can offer the same confidentiality and capabilities users expect from Web2. The company is seeking a senior frontend engineer to own frontend architecture end-to-end, build production-grade Web3 user experiences, and raise engineering standards while mentoring junior engineers. The ideal candidate combines strong frontend fundamentals with deep Web3 expertise — including wallet integrations, transaction/message signing, session keys, onchain data fetching, and security-conscious UX design. This role is remote / hybrid / based in Bangalore (preferred) and was originally posted on Himalayas.

Responsibilities

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
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
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
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
Help build the frontend experience for Inco's core products, making advanced privacy and Web3 payment flows feel simple, secure, and intuitive
Be responsible for creating interfaces that users can trust when signing intents, managing permissions, interacting with wallets, and moving funds privately
Help establish the frontend foundation for Inco's products while mentoring the team and setting a high bar for quality, security, and user experience

Requirements

5+ years of frontend engineering experience, with strong production experience building complex applications
Strong expertise in TypeScript, React, and modern frontend development
Experience building Web3, crypto, wallet, DeFi, payments, or blockchain-related frontend products
Strong understanding of wallet integrations, transaction flows, message signing, and onchain data fetching
Experience working with libraries and tools such as viem, wagmi, ethers.js, WalletConnect, RainbowKit, or similar
Strong understanding of frontend state management, API integration, caching, and real-time data updates
Ability to reason carefully about security-sensitive frontend flows involving user funds, permissions, signatures, or keys
Experience owning large frontend features from design to production
Strong communication skills and ability to work closely with product, design, backend, and protocol engineers
Experience mentoring junior engineers and raising frontend engineering standards
Startup mindset: comfortable with ambiguity, fast iteration, and taking ownership end-to-end

Nice to have

Experience building wallets, smart account interfaces, account abstraction flows, or session key systems
Experience with intent-based protocols, delegated permissions, EIP-712 signatures, EIP-1271, EIP-4337, or EIP-7702
Experience building frontend interfaces for privacy-preserving, security-sensitive, or financial applications
Experience with indexers, subgraphs, custom backend APIs, RPC providers, and blockchain event reconciliation
Strong product sense and ability to simplify complex Web3 flows for mainstream users
Experience with frontend testing, including unit tests, integration tests, end-to-end tests, and wallet interaction testing
Experience with Next.js, Tailwind, design systems, component libraries, and frontend performance optimization
Open-source contributions or prior work in crypto, wallets, DeFi, payments, or developer tools