Senior Frontend Engineer - React/Next.js, Cloud & AI Tools

Lingarogroup; Poland; On-site; PLN 140,000 - 200,000; Full time

Job summary

Lingarogroup is seeking an experienced Frontend Developer to design, build and maintain React/Next.js applications. You will ensure performance, quality, and responsiveness while collaborating with cross-functional teams in an agile setup.

The role requires 5+ years of professional experience, strong JavaScript/TypeScript skills, and proficiency with semantic HTML and modern CSS tooling. English at B2+ is expected.

Qualifications

• 5+ years of professional experience.
• Excellent communication skills.
• Strong ownership of assigned tasks, self-driven and proactive.
• Proficiency in JavaScript and TypeScript.
• Thorough understanding of React/Next.js principles, React Router, hooks, and Redux.
• Experience building modern distributed microservices.
• Cloud environment development (Google Cloud preferred).
• Building, testing, and troubleshooting high-volume web services using REST & JSON.
• Strong foundation in data structures and algorithms in JS.
• Expertise with semantic HTML and modern CSS tooling.
• Experience with responsive/adaptive design and testing (unit and E2E).
• Familiarity with AI-assisted development tools to improve productivity and code quality.
• English proficiency at B2+.

Responsibilities

• Design, build and maintain efficient, reusable and reliable code.
• Build React/Next.js based applications.
• Ensure the best performance, quality, and responsiveness of applications.
• Identify bottlenecks and bugs, and devise solutions.
• Help maintain code quality.
• Participate in agile team scrums and communicate status clearly.
• Collaborate with BA, QA, developers and offshore teams to deliver applications requested by stakeholders.
• Share knowledge with the team during workshops.

Skills

JavaScript

TypeScript

React/Next.js

Web performance

Security

REST & JSON

Semantic HTML

CSS (Tailwind)

Tailwind

Styled Components

CSS Modules

SASS

Unit testing

E2E testing

AI-assisted tools

GitHub Copilot

English (B2+)

Tools

Docker

Contentful

NodeJS

GraphQL

REST APIs

API testing tools

Job description

Lingarogroup is seeking an experienced Frontend Developer to design, build and maintain React/Next.js applications. You will ensure performance, quality, and responsiveness while collaborating with cross-functional teams in an agile setup.

The role requires 5+ years of professional experience, strong JavaScript/TypeScript skills, and proficiency with semantic HTML and modern CSS tooling. English at B2+ is expected.