Senior Frontend Engineer

Responsibilities

• • Develop and maintain high-quality frontend applications and features

  • Write clean, maintainable, well-tested code with comprehensive unit and E2E test coverage

  • Build semantic, adaptive, cross-browser, and cross-platform layouts following web standards and accessibility best practices

  • Design and implement reusable component systems and contribute to the shared UI library

  • Optimize application performance (rendering, bundle size, Core Web Vitals)

  • Collaborate with designers (Figma) to deliver pixel-perfect, consistent implementations

  • Integrate with backend services and external APIs; agree on API contracts with backend engineers

  • Configure and improve build tooling, CI/CD pipelines, and Docker environments

  • Participate in code reviews, technical discussions, and architectural decisions

  • Mentor Middle and Junior engineers and contribute to improving product quality

  ABOUT THE TEAM

  You will join a product engineering team of frontend, backend, QA, and DevOps engineers working closely with Product and Design. The team owns its features end to end: from implementation and testing to release and monitoring.

  Typical Tech Stack:

  • Languages: JavaScript (ES6+), TypeScript

  • Frameworks: React, Vue, Next.js (SSR)

  • State Management: RTK, MobX, Zustand, Pinia

  • Build Tools: Vite, Webpack, SWC

  • Styling: SCSS, CSS Modules, CSS-in-JS

  • Quality Tools: ESLint, StyleLint, Prettier, Husky

  • Testing: Unit and E2E testing frameworks

  • Infrastructure: Docker, GitLab CI/CD

Nice to have

• Required:

  Core JavaScript/TypeScript Expertise:

  • 5+ years of commercial frontend development experience

  • Advanced proficiency in JavaScript (ES6+), including asynchronous programming (async/await, Promises), prototype-based OOP, classes, and memory management fundamentals

  • Deep TypeScript knowledge: generics, utility types, custom type declarations, and extending library types

  Frontend Engineering Skills:

  • Advanced experience with semantic, adaptive, cross-browser, and cross-platform layouts; understanding of web standards and accessibility

  • Strong CSS skills, including SASS/SCSS and CSS-in-JS solutions

  • Experience with modern frameworks (React, Vue, or similar): reactivity principles, state management, component optimization, and render control

  • Experience with various state managers

  • Experience with SSR/isomorphic applications

  • Experience building component systems, including the compound components approach

  • Understanding of data structures, algorithm complexity, and common design patterns

  • Knowledge of basic caching techniques (e.g., LRU)

  • Ability to decompose tasks and separate business logic from framework/library code

  Tools & Practices:

  • Experience configuring and optimizing build tools (Vite, Webpack)

  • Experience with code quality tools (ESLint, StyleLint, Prettier, Biome)

  • Experience writing unit and E2E tests

  • Understanding of REST API fundamentals and experience integrating with external services

  • Experience with Docker (configuring and optimizing containers)

  • Proficiency with Git (GitLab)

  • Confident use of Figma for design implementation

  • Good written and spoken English

  Preferred:

  • Experience with hybrid applications (WebView, React Native)

  • Experience with Web3 frontend development: wallet integration (embedded and browser wallets), wallet and signing standards (EIP-1193, EIP-6963, EIP-712), ethers.js, viem, wagmi

  • Knowledge of Core Web Vitals and SEO principles

  • Experience with web security fundamentals (XSS, CSRF, secure handling of user data)

  • Experience with frontend performance profiling and monitoring

  • Experience creating and maintaining design system libraries

  • Experience leading technical initiatives or mentoring engineers

  • Practical, up-to-date experience with modern AI tools (e.g. Claude, Copilot, Cursor) for code generation, review, and accelerating day-to-day engineering work

  IDEAL CANDIDATE

  • Eager to learn new technologies and approaches

  • Engaged with business processes and product goals

  • Detail-oriented with a responsible approach to work

  • Actively participates in discussions to improve product quality

  • Motivated to build products that make a difference for users