Clari

Staff Software Engineer – Frontend

Clari

full-time

Posted on:

Location Type: Hybrid

Location: Kraków • 🇵🇱 Poland

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Job Level

Lead

Tech Stack

GraphQLJestMochaReactTypeScript

About the role

  • Design and build delightful, performant, and accessible user experiences across our React-based applications
  • Drive the evolution of Clari’s shared component library and design system to ensure consistency, usability, and scalability across products
  • Define and evangelize best practices for state management, routing, composition, testing, and build tooling
  • Partner with product designers, backend engineers, and PMs to deliver cohesive, end-to-end solutions that move key business metrics
  • Mentor junior and mid-level engineers, fostering a culture of technical excellence and growth
  • Contribute to cross-functional initiatives that influence the company’s architecture and long-term product direction

Requirements

  • 8+ years of experience building and shipping large-scale React/TypeScript single-page applications.
  • Deep understanding of React hooks, composition patterns, and state management.
  • Strong command of CSS, responsive design, and accessibility best practices.
  • Experience with frontend testing frameworks (Jest, Mocha, or Jasmine).
  • Familiarity with observability tools such as Sentry, Datadog, Pendo, or FullStory.
  • Comfort working with backend engineers via REST or GraphQL APIs.
  • Strong communication skills and the ability to explain technical concepts clearly.
  • A product mindset and focus on building experiences users love.
  • Bonus experience with Design Systems, Storybook, GraphQL, charting or data visualization libraries.
Benefits
  • Team-bonding activities and company-wide events
  • Flexible working hours
  • Annual Well-being and Professional Development Stipends
  • Private Healthcare and Multisport Pass
  • Paid maternity and paternity leave

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
ReactTypeScriptCSSresponsive designaccessibility best practicesstate managementfrontend testing frameworksJestMochaJasmine
Soft skills
strong communication skillsmentoringtechnical excellencecollaborationproduct mindset