FullStack Middle NextJS developer for the project

The JDI company is looking for a FullStack Middle NextJS developer to join its team for a project that will last approximately 6 months, with the possibility of extending cooperation after the project is completed.

General information about the project

The project is being rewritten from React to Next.js with a complete migration of functionality.

## Required technical skills

### Next.js and React

- Experience with Next.js 14+ (App Router)

- Server Components and Client Components

- Server Actions and Route Handlers

- Working with API Routes and middleware

- Optimization: ISR, SSG, SSR

- Image Optimization and static assets

- Routing and navigation

### TypeScript

- Experience with TypeScript 5+

- Typing components, API, state

- Generics and utility types

- Working with typing of external libraries

### State Management

- Redux Toolkit or Zustand

- Server State (React Query/TanStack Query)

- Client state (useState, useReducer)

- Persist state (localStorage, cookies)

### Styling

- CSS Modules or Tailwind CSS

- SCSS/SASS

- Responsive design (mobile-first)

- Adaptive components

### Backend Integration

- REST API

- Axios or fetch

- Error handling and retry logic

- Authentication and authorization (JWT, sessions)

### Database

- Working with MySQL via ORM (Prisma/Drizzle)

- Query optimization

- Migrations and schemas

## Specialized integrations (mandatory)

### BankID Integration

- OAuth 2.0 flow

- Working with encrypted data

- Document and signature processing

- Error handling and retry logic

### Diia Integration

- Working with certificates and encryption

- P7S/P7E formats

- Integration with Diia API

### Payment systems

- Portmone

- Creating signatures and validating payments

- Webhook handling

## Technical requirements

### Performance

- Optimization of Core Web Vitals

- Code splitting and lazy loading

- Optimization of images and assets

- Data caching

### SEO

- Meta tags and Open Graph

- Structured data

- Sitemap and robots.txt

- Canonical URLs

### Security

- Validation on client and server

- Protection against XSS and CSRF

- Secure storage of tokens

- Rate limiting

### Accessibility

- ARIA attributes

- Keyboard navigation

- Screen reader support

- Color contrast

## Additional skills (preferred)

- Experience with React Hook Form

- Experience with Chart.js or other chart libraries

- Experience with react-select, react-datepicker, and other UI libraries

- Experience with testing (Jest, React Testing Library)

- Experience with CI/CD (GitHub Actions, GitLab CI)

- Experience with Docker

## Level of experience

- Minimum 1–2 years of commercial experience with React

- Minimum 2–3 years of experience with Next.js

- Experience with TypeScript (at least 1 year)

- Experience with third-party API integrations

- Experience with admin panels and complex forms

To confirm your skills and suitability for this job, you will need to complete a test task that takes 2-4 hours.
Payment is monthly and depends on your experience 40,000 - 60,000 UAH.