Senior UI Engineer (React)

Luxoft; Kraków; On-site; PLN 300,000 - 460,000; Full time

Job summary

DXC Luxoft in Kraków is seeking a seasoned Front-end Engineer to build high‑performance React applications within a data‑dense onboarding domain. You will collaborate with business stakeholders, backend engineers, UX designers, and QA to deliver robust, stateful interfaces and reusable components.

Ideal candidates bring 8+ years in front-end development, strong REST API experience, and proven production deliveries.

Qualifications

• 8+ years in front-end development with production React apps.
• Strong REST API integration and collaboration with backend teams.
• Two complex user-facing apps delivered to production.
• Solid fundamentals in component design, state, performance, accessibility, and maintainable code.
• Experience with Jest, React Testing Library, Cypress, and CI/CD pipelines.

Responsibilities

• Create new components for the business-driven library to represent client data.
• Collaborate with business stakeholders, backend developers, UX designers, and QA.
• Master state-of-the-art technologies within a complex domain.
• Solve challenging problems with elegant solutions.
• Share knowledge across the project team and contribute to quality in every iteration.

Skills

React

RESTful APIs

State management

Testing

CI/CD

Agile/Scrum

Communication

Performance optimization

Accessibility

Tools

Jest

React Testing Library

Cypress

GitLab CI/CD

Webpack

Vite

Job description

DXC Luxoft is a global IT services and consulting company, part of DXC Technology, delivering cutting‑edge digital and software solutions worldwide. We partner with leading financial institutions and global enterprises, helping them transform and scale through modern technology.

Join a global community of engineers and be part of building impactful, modern technology solutions!

Project Description:

We are developing a high-performance workflow system for the client's onboarding domain. This system focuses on capturing various types of data from clients based on JSON schema. The project involves extending the workflow system functionalities, including a single-page application (SPA) written in React 17+ and a business-oriented components library that is reused by multiple applications to capture data. The UI team and most of the project team is co-located in Krakow - it means effective and close collaboration. We are looking for a proactive individual who can suggest improvements to the library and the application and take ownership of their work.

This person will collaborate with the business team and backend developers to discuss domain-level changes and will not shy away from participating in discussions.

Responsibilities:

• Create new components for the business-driven library to represent client data.
• Collaborate closely with business stakeholders, server-side developers, user experience designers, and quality assurance professionals.
• Master state-of-the-art technologies and a complex business domain.
• Solve challenging problems in elegant ways.
• Share knowledge across the project team.
• Contribute to the quality of software delivered in each development iteration.

Mandatory Skills Description:

• At least 8+ years of practical experience in front-end development, with a proven track record of long-term engagements building and delivering production React applications.
• Solid understanding of RESTful API integration patterns and clear communication of requirements to backend teams.
• At least two complex, user-facing applications successfully delivered to production, ideally involving rich interactive UIs, state-heavy workflows, or data-dense interfaces.
• Strong grasp of front-end engineering fundamentals: component design, state management, performance optimization, accessibility, and maintainable code.
• Solid understanding of testing practices: unit, integration, and end-to-end testing of UI applications (e.g., Jest, React Testing Library, Cypress), plus CI/CD pipelines (e.g., GitLab CI/CD).
• Ability to evaluate trade-offs and select appropriate libraries, frameworks, and architectural patterns for a given problem.
• Experience with PoC development and iterating quickly based on results.
• Excellent problem-solving abilities, clean coding skills, and strong attention to detail.
• Familiarity with Agile development practices (Scrum, Kanban, etc.) and excellent communication and collaboration skills.
• Experience using agentic LLMs to support the development process.

Nice-to-Have Skills Description:

• Experience with Cypress or similar end-to-end testing frameworks.
• Experience with Figma and translating UI designs into production code.
• Understanding of UX principles and approaches.
• Familiarity with micro-frontend architectures and build tooling (e.g., webpack, Vite).