.NET Fullstack Developer (React)

Experis ManpowerGroup Sp. z o.o.; Kraków; Remote; PLN 120,000 - 180,000; Full time

Job summary

A prominent technology recruitment firm is looking for a Full-Stack Developer for a remote position. The ideal candidate will modernize applications, enhance UI components, and utilize DevOps practices. Requirements include expertise in React, .NET, and a strong understanding of functional programming. This role offers benefits like MultiSport Plus and group insurance.

Benefits

100% remote work

MultiSport Plus

Group insurance

Medicover Premium

E-learning platform

Qualifications

• Strong expertise in modern web development practices.
• Experience with both front-end and back-end technologies.
• Knowledge of functional programming principles.

Responsibilities

• Modernize legacy applications.
• Build and enhance UI components.
• Integrate APIs and deploy applications to Azure.
• Apply testing methodologies in development.
• Implement state management effectively.

Skills

React (latest)

TypeScript (including generics)

JavaScript (ES6+)

HTML5

CSS3

SCSS

Context API

Redux

Axios

Jest

React Testing Library

Webpack

Node.js

NPM

.NET (latest)

C#

Web API

Entity Framework Core

SQL Server

Job description

We are seeking a highly skilled Full-Stack Developer with strong expertise in both front-end and back-end technologies. The ideal candidate will be responsible for modernizing legacy applications, building and enhancing UI components, integrating APIs, and deploying applications to Azure using DevOps practices. A strong understanding of functional programming principles and testing methodologies is essential.

Tasks:

Modernizing Legacy Applications

• Convert class-based components to functional ones using hooks.
• Ensure backward compatibility and performance optimization.

Building and Enhancing UI Components

• Analyze and refactor components from React v16 to React v19.
• Develop responsive interfaces using HTML5, CSS3, SCSS.
• Implement accessibility standards (WCAG, ARIA).

State Management Implementation

• Integrate Context API or Redux for complex state handling.
• Optimize state flows across components.

API Integration

• Connect front-end components to REST APIs using Axios or fetch.
• Handle loading states, errors, and data transformation.

Creating and Publishing NPM Packages

• Build reusable components and package them for internal/external use.
• Configure Webpack or Vite for bundling and deployment.

Testing Responsibilities

• Apply TDD/BDD methodologies using Jest and React Testing Library.
• Use mocks and fakes to simulate API responses and component behavior.

Cloud & DevOps Tasks

• Set up Azure App Services and Functions.
• Configure CI/CD pipelines using Azure DevOps.

Functional Programming Practices

• Use pure functions, immutability, and declarative patterns.
• Apply React Hooks, Higher-Order Components (HOCs), and composition techniques.

Requirements:

Front-end Skills

• React (latest), TypeScript (including generics), JavaScript (ES6+), HTML5, CSS3, SCSS.
• State Management: Context API, Redux or similar.
• API Integration: Axios, fetch.
• Testing: Jest, React Testing Library.
• Build Tools: Vite, Webpack, Node.js.
• Packaging: NPM and creating NPM packages.
• Web Accessibility: WCAG, ARIA (preferred).
• Server-side Rendering: Next.js or experience with SSR, SSG, lazy loading (preferred).
• Functional Programming: Immutability, pure functions, declarative programming, React Hooks, HOCs, functional composition (preferred).

Back-end Skills

• .NET (latest), C#, Web API, Entity Framework Core, LINQ.
• Databases: SQL Server, Cosmos DB (NoSQL).
• Testing: xUnit/NUnit.
• Best Practices: OOP, SOLID principles, IoC, DI, clean architecture, DDD, asynchronous programming, generics.
• Security & Authentication: OAuth, JWT, Microsoft Entra ID (Azure AD), OWASP (preferred).

Offer:

• 100% remote work
• MultiSport Plus
• Group insurance
• Medicover Premium
• e-learning platform