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# Senior Front-End Engineer (React)

- **Company:** Symbiotic
- **Location:** London, UK (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Performance Management, Cascading Style Sheets (CSS), Code Review, Data Validation, Software Debugging, Github, E2e Testing, Blockchain, Next.js, Responsive Web Design, TypeScript, Web Usability, ReactJS, Caching, Webpack, Git Flow, Material UI, Kubernetes, Playwright, Sentry, Figma, Web3.js, Front End Software Development, JestJS, Docker
- **Published:** August 4, 2026
- **Apply:** https://uk.indeed.com/viewjob?jk=e4c3960bfd6438ac

## About the Role

* Expert in modern React and TypeScript, with strong instincts for component architecture and type-safe design
 * Production experience with Next.js, Vite, and pnpm-based monorepos
 * Deep understanding of state management - server state (TanStack Query), lightweight client state (Zustand or similar), and when to use which
 * Strong CSS and responsive design fundamentals; experience with component libraries such as Chakra UI
 * Able to turn Figma designs into accessible, reusable components, ideally documented in Storybook
 * Solid testing practice across unit, integration, and E2E (Vitest, Playwright), including async and wallet-interaction flows
 * Able to optimize performance (code splitting, memoization, bundle analysis, Core Web Vitals) and debug production issues with tools like Sentry
 * Security-conscious: CSP, secure wallet interactions, input validation, and safe handling of secrets
 * Confident with Git workflows, Docker, and GitHub CI/CD; basic familiarity with Kubernetes and CDNs
 * Nice to have: experience integrating frontends with blockchain networks - wagmi/viem, wallet connection flows, transaction lifecycles, and Web3 UX

## Description

* Participate in all phases of frontend development: requirements analysis, architecture and design, implementation, documentation, testing, and delivery.
 * Build responsive and accessible user interfaces based on Figma designs.
 * Prototype interfaces for testing mvps.
 * Develop reusable components and maintain them in Storybook.
 * Integrate new features into the existing codebase.
 * Implement blockchain and wallet interactions.
 * Design efficient approaches to client-side state management, server-state synchronization, caching, and error handling.
 * Write unit, integration, and end-to-end tests.
 * Monitor production issues and application performance using Sentry.
 * Contribute to project estimation, planning, and technical decision-making.
 * Review code written by other team members and help maintain engineering standards.
 * Communicate effectively with engineers, designers, product stakeholders, and company partners.


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