Lead Frontend Engineer (next.js)

For Digital Hub Warsaw, we are looking for:

Lead Frontend Engineer 

You’ll build the user interface for myGenAssist, an enterprise AI assistant platform. The frontend is a Next.js application with real-time AI streaming, rich text editing, workflow builders, and voice capabilities.

Key Tasks & Responsibilities:

• Build and maintain features using Next.js (App Router), React, and TypeScript.

• Develop reusable UI components using Mantine and Tailwind CSS, following our design system and dark mode support.

• Implement real-time AI interactions including streaming chat responses (SSE), tool-call rendering, and agent workflow visualization.

• Manage client-side state with Zustand and data fetching with SWR.

• Optimize application performance across devices — code splitting, lazy loading, efficient re-renders.

• Write unit tests (Vitest) and E2E tests (Cypress). PRs require test coverage, enforced in CI.

• Participate in code reviews with attention to TypeScript correctness, accessibility, and responsive design.

  
  

Qualifications & Competencies (education, skills, experience): 

• 7+ years with React and TypeScript in production

• Strong Next.js experience (App Router, server/client components)

• TypeScript in strict mode

• Experience with a component library (Mantine preferred, or MUI/Chakra — willingness to learn Mantine)

• Tailwind CSS

• State management with Zustand, Redux, or similar

• Experience with SSE or WebSocket streaming for real-time UIs

• Testing with Vitest or Jest + Testing Library; familiarity with E2E testing

• Git and PR-based workflow

  
  

What do We offer:

• A flexible, remote-hybrid work model

• Great workplace in a new modern office in Warsaw

• Career development, 360° Feedback & Mentoring programme

• Wide access to professional development tools, trainings, & conferences

• Company Bonus & Reward Structure

• VIP Medical Care Package (including Dental & Mental health)

• Holiday allowance (“Wczasy pod gruszą”)

• Life & Travel Insurance

• Pension plan

• Co-financed sport card - FitProfit

• Meals Subsidy in Office

• Budget for Home Office Setup & Maintenance

• Access to Company Game Room equipped with table tennis, soccer table, Sony PlayStation 5 and Xbox Series X consoles setup with premium game passes, and massage chairs

• Tailored-made support in relocation to Warsaw when needed

• Please send your CV in English 

  
  

WORK LOCATION: WARSAW AL. JEROZOLIMSKIE 158