Senior Frontend Developer (React)

About the Position

Senior Frontend Developer (React)

Remote

26,040 - 28,560 PLN/month

Warsaw, Poland

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Responsibilities

• Design, build, and scale a modern React and TypeScript web application.
• Focus on frontend architecture and UI development (responsive design, component-driven architecture, state management, and design system alignment).
• Collaborate on backend integration to ensure type-safe connectivity.
• Implement authentication and application security.
• Handle data and messaging.
• Own testing and quality assurance.
• Follow spec-driven, agentic engineering practices.
• Provide DevOps and operational support.
• Collaborate with stakeholders.

Requirements

• Bachelor’s degree in Computer Science/Software Engineering or equivalent experience.
• Deep expertise with modern React, TypeScript, state management libraries, and component-driven architecture.
• Proven track record of building enterprise web apps, data dashboards, complex form flows, and design systems.
• Proficiency with frontend build systems (e.g., Vite), CSS-in-JS / Tailwind, and UI component libraries.
• Experience writing frontend tests with React Testing Library and Vitest (or E2E with Cypress/Playwright).
• Solid understanding of RESTful APIs, HTTP/JSON contracts, client-side caching, and type generation (e.g., Zod, OpenAPI).
• Working knowledge of Node.js and TypeScript backends.
• Practical knowledge of OAuth 2.0 and secure web application development.
• Strong troubleshooting skills across application, identity, network, and infrastructure boundaries.
• Excellent communication skills in English.
• Ability to work independently and take ownership.

We Offer

• Ongoing support from a dedicated agent.
• Consultant Development Program for growth planning with mentors.
• Access to 7N Learning & Development (webinars, articles, reports, events).
• Professional integration events for you and your loved ones.
• Ongoing professional development and knowledge transfer opportunities within 7N Services.
• Complete benefits package: medical care funding, life insurance, sports cards, and store discounts in Poland and abroad.

About the Company

7N Sp. z o. o. is a leading company in the technology sector, dedicated to delivering innovative solutions and fostering a collaborative work environment.