Lead Frontend Developer (React)

Lead Frontend Developer (React) Country: Poland | Work Location: Remotely Salary: 23 500 – 25 000 PLN + VAT on B2B We are looking for a Lead React Developer for our UK client, who specializes in psychometrics tools like personality questionnaires to enhance hiring and personnel development.

Responsibilities

• As a React Developer you will be developing and maintaining modern React applications using TypeScript, applying up-to-date React patterns to ensure clean, scalable, and maintainable code;
• You will be configuring and maintaining bundling tools such as Webpack, ensuring efficient builds, optimized asset delivery, and smooth development workflows;
• You will be implementing performance optimization techniques, including code-splitting, tree-shaking, lazy loading, and caching strategies, to improve application responsiveness and load times in real-world usage;
• You will be integrating React-based front-end applications with ASP.NET Core MVC and Razor Pages, ensuring seamless communication and consistent behavior across frontend and backend layers;
• You will be collaborating closely with backend teams, aligning on API contracts, data models, and architectural decisions to support stable and scalable integrations;
• You will be conducting code reviews and mentoring junior developers, sharing best practices and supporting code quality across the team;
• You will be ensuring accessibility compliance according to WCAG 2.2 AA standards, applying inclusive design principles and secure coding practices throughout the development process;
• You will be maintaining robust test coverage, ensuring application reliability through well-structured and meaningful automated tests.

Requirements

• 5+ years of experience with React and TypeScript, ensuring the ability to design and maintain complex, production-grade frontend applications;
• Experience with team management, allowing you to support, guide, and coordinate the work of other developers;
• Familiarity with Razor Pages and ASP.NET MVC, allowing effective integration between React frontends and .NET-based server-side solutions;
• Experience with .NET Web APIs, authentication patterns, and middleware configuration, enabling secure and reliable frontend–backend communication;
• Strong understanding of state management and data-fetching strategies, ensuring predictable application behavior and efficient data flow;
• Proven ability to optimize performance and manage complex bundling configurations, supporting scalable and high-performing frontend systems;
• Proficiency with Git workflows and collaborative development practices, ensuring smooth teamwork and controlled code evolution;
• Solid knowledge of testing and accessibility standards, with hands-on experience using tools such as Jest and React Testing Library;
• Demonstrable experience improving real-world application performance, focusing on actual user experience rather than synthetic metrics alone.

We offer

• Salary for work amounting to 23 500 - 25 000 PLN + VAT on B2B;
• Flexible working conditions;
• Private healthcare, Multisport card and trainings.

Please be advised that we will only contact selected candidates What to Know Before Applying? We have a tight-knit team, creating some of the best work of their lives. We’re always growing and changing and occasionally places do come up so we are always on the lookout for talented people to join us. If you’re passionate about what you do then get in touch. We are always happy to take the time to listen and see what you can do. How Does the Recruitment Process Look Like? 1 Initial Consultation Have a short talk with our recruiter who will provide you with more details about our company and the specific project. Since the recruitment process can vary between projects, this conversation will outline the process that applies to you. 2 Client-Side Evaluation This stage involves a series of bespoke recruitment activities led by our client. It's designed not only to assess how your skills and background align with the project's demands but also to ensure that the project environment is the right fit for you. This dual-focus ensures that both parties can thrive in this partnership. 3 Signing and Starting Your Journey After successfully navigating the recruitment process, you'll sign your employment contract and begin your new role. We ensure a smooth transition into your position with comprehensive onboarding support. Didn’t Find a Job Offer for Yourself? If you do not see a job directly suited to your experience but feel that you have an interesting skill set for us feel free to send us your CV at [email protected]. Join our talent base! Apply tot his job Apply To this Job