Senior Frontend Software Engineer

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

Project description

You'll be working in the Investment Bank IT (Agency Trading - Market Engineering Crew) team. Our role is to manage global applications, providing oversight, support, analysis, and solutions that implement a strategic architecture.This position is for a front-end developer to join the Agency Trading - Market Engineering team to make valuable contributions to both the existing platform and play a pivotal role in the build-out of our strategic middle office solution using the proprietary state-of-art low latency framework. We're a global team and work around the clock to provide best-in-class solutions.

You are

• Able to deliver from conception through to production, streamlined, high-availability, high-performance, high-quality, well-tested, and easy-to-support software in a timely manner
• Accountable with a strong sense of ownership of your system and will continually strive to improve it
• Proactive about addressing any deficiencies, risks, and stability problems by helping to develop & refine software, tools, processes, procedures, and documentation
• Focused on quality
• Aware of ongoing technology trends and know pragmatically leverage their benefits
• Quick learner
• Comfortable working independently, as well as in a team-oriented, collaborative environment
• Fluent in English

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 a strong focus on performance, accessibility, and maintainability
• Collaborate closely with backend engineers to define and consume RESTful APIs, clearly communicating requirements and constraints
• Translate business and product 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 React Testing Library, Cypress, and/or Playwright
• Implement and maintain application styling using CSS3, Less, and CSS Modules, taking ownership of UI look and feel
• Participate actively in agile ceremonies (Scrum/Kanban), including refinement, planning, reviews, and retrospectives
• Perform code reviews and contribute to continuous improvement of front-end standards and tooling
• Work closely with QA, product managers, and designers to ensure high-quality, business-aligned deliveries
• Support and improve existing applications in a fast-paced, enterprise investment-banking environment

SKILLS

Must have

• Expertise in HTML5 and JavaScript (ES).
• Proven experience with React 17+, Typescript, Redux is a plus
• Minimum 10 years of experience in React with Typescript proven track of engagement in long-term projects in React
• Experience in testing UI applications (RTL, Cypress, Playwright)
• Proficiency in CSS3/Less/CSS Modules (not being afraid to style applications).
• Clean coding skills.
• Excellent problem-solving abilities.
• Experience in RESTful API design.
• Familiarity with agile development practices (Scrum, Kanban, etc.).
• Good communication skills and the ability to clearly state requirements for the backend team.

Nice to have

Familiarity with AI-related concepts and components, such as skills, tools, MCP servers, and agent communication patterns.