Senior Frontend Developer

We are looking for a Senior Frontend Developer to join our team.

About the project: a biometric identity platform. The libraries we build encapsulate handling of biometric data and drive access-level logic across consumer applications — a regulated domain with hard constraints on how data is stored and used.

Responsibilities

• Design, build and maintain TypeScript libraries and reusable packages consumed by other product teams
• Build reusable React components and modules with clean, type-safe public APIs
• Define and maintain state management patterns at the library level
• Own versioning and backward compatibility: semver, changesets, breaking-change policy, migration guides
• Maintain the build and publish pipeline: bundling (Rollup / tsup / Vite), ESM + CJS output, tree-shaking, bundle-size budgets, peer dependencies
• Encode access-control rules in the type system so consumers cannot access or render data beyond their permission level
• Cover libraries with unit and type-level tests; keep the public API stable and regression-safe
• Leverage AI-assisted tools to accelerate development workflows
• Participate in code reviews and contribute to internal engineering standards

Requirements

• 7+ years of commercial experience in front-end development
• Proven experience building and maintaining TypeScript libraries/packages consumed by other teams
• Deep knowledge of TypeScript: generics, conditional and mapped types, discriminated unions, branded types, declaration output
• Experience with state management solutions
• Experience with monorepo tooling (pnpm workspaces, Nx or Turborepo)
• Strong hands-on experience with React
• Testing: Vitest/Jest, React Testing Library, type-level testing (tsd / expect-type)
• Solid understanding of REST services and API contract design
• Understanding of access-control models (RBAC / ABAC)
  Experience with AI-assisted development tools (Claude Code, Codex, Cursor, etc.)
• Upper-Intermediate level of English or higher
• Self-motivated, proactive and detail-oriented

We Offer:

• Innovation Culture: Work in a team that actively experiments with AI and modern development approaches
• Real Product Impact: Direct collaboration with a client and influence on product decisions
• Flexible Work: Remote work or a modern office in Kyiv
• Generous Time Off: 20 paid vacation days + 15 sick leave days annually
• Professional Growth: Compensation for courses, certifications, and learning resources
• Cutting-Edge Tools: Access to premium AI tools (Cursor Pro, Сlaude Code, Codex, etc.)

Recruitment Process:

1. CV Review
2. HR&Technical Interview
3. Client Stage
4. Job Offer