Senior Frontend Engineer: React/TypeScript, High-Perf UI

Luxoft; Kraków; Hybrid; PLN 180,000 - 300,000; Full time

Job summary

Luxoft in Kraków, Poland, is seeking a senior Front-end Developer to join the Agency Trading - Market Engineering Crew. You will design, build, and maintain scalable web interfaces using React (17+) and TypeScript, with emphasis on performance, accessibility, and testability.

Collaborating with backend engineers and QA, you will convert business needs into intuitive UIs, apply clean coding practices, and contribute to frontend standards within an agile environment. Fluency in English required.

Qualifications

• Expertise in HTML5 and JavaScript (ES).
• 10+ years React experience with TypeScript in long-term projects.
• Experience with React 17+ and Redux.
• Experience in testing UI applications (RTL, Cypress, Playwright).
• Proficiency in CSS3/Less/CSS Modules and responsive styling.
• Strong RESTful API design understanding.
• Familiar with Agile practices (Scrum, Kanban).
• Excellent problem-solving and communication skills.

Responsibilities

• Design, develop, and maintain modern, scalable web applications using React (17+) and TypeScript, with exposure to Angular where required.
• Build high-quality, reusable UI components with focus on performance and accessibility.
• Collaborate with backend engineers to define and consume RESTful APIs and communicate requirements clearly.
• Translate business requirements into clean, intuitive user interfaces.
• Apply clean code principles and front-end best practices across the codebase.
• Write and maintain automated UI tests using RTL, Cypress, or Playwright.
• Implement and maintain styling with CSS3, Less, and CSS Modules.
• Participate in agile ceremonies and contribute to front-end standards and tooling.
• Work with QA, product managers, and designers to ensure high-quality deliveries.

Skills

React

TypeScript

Redux

HTML5

JavaScript (ES)

RESTful API design

Testing UI (RTL/Cypress/Playwright)

Clean coding

Agile development

Communication

Tools

CSS3/Less/CSS Modules

Job description

Luxoft in Kraków, Poland, is seeking a senior Front-end Developer to join the Agency Trading - Market Engineering Crew. You will design, build, and maintain scalable web interfaces using React (17+) and TypeScript, with emphasis on performance, accessibility, and testability.

Collaborating with backend engineers and QA, you will convert business needs into intuitive UIs, apply clean coding practices, and contribute to frontend standards within an agile environment. Fluency in English required.