Senior Software Engineer (React)

Senior Software Engineer (React)
(Hybrid/Kraków – 1 day per week in the office)

We’re Kingfisher, a team made up of over 74,000 passionate people who bring Kingfisher - and all our other brands: Castorama, B&Q, Screwfix, Brico Dépôt and Koçtaş - to life. That’s right, we’re big, but we have ambitions to become even bigger and even better. We want to become the leading home improvement company and grow the largest community of home improvers in the world. And that’s where you come in.

At Kingfisher, our customers come from all walks of life, and so do we. We want to ensure that all colleagues, future colleagues, and applicants to Kingfisher are treated equally regardless of age, gender, marital or civil partnership status, colour, ethnic or national origin, culture, religious belief, philosophical belief, political opinion, disability, gender identity, gender expression or sexual orientation.

We are open to flexible and agile working. Therefore, we offer colleagues a blend of working from home and our office, located in Kraków. Talk to us about how we can best support you!

At Kingfisher, we value the perspectives that any new team members bring, and we want to hear from you. We encourage you to apply for one of our roles, even if you do not feel you meet 100% of the requirements.

In return, we offer an inclusive environment, where what you can achieve is limited only by your imagination! We encourage new ideas, actively support experimentation, and strive to build an environment where everyone can be their best self.

We offer a competitive benefit package and plenty of opportunities to stretch and grow your career: 

• 20,000 - 28,000 PLN gross per month on an employment contract

• Private medical healthcare at LUXMED (including dentalcare) for you and your family

• Medicover sports card (Fit&More package)

• Life insurance financed by the employer

• 30-minute lunch break included in the 8-hour working day

• Work in a highly professional and stimulating atmosphere

• Training & Buddy programme that will allow you to quickly adapt to your new role

• Wellbeing programme for employees

• Co-financing of monthly tickets for the public transport in Krakow

• Comfortable working environment in the office and the possibility of home office

• Language courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification

• Employee referral programme 

What's the job?

About the role 

As a Senior Software Engineer within the frontend domain, you will focus on developing and maintaining high-quality, scalable frontend solutions that align with broader business goals. You will work closely with your team to tackle complex challenges, contribute your expertise as an individual contributor, and help ensure strong engineering standards across the board.

You’ll also play a key role in elevating the team’s frontend capabilities and driving meaningful impact within your squad.

If you're looking for an exciting opportunity to step out of your comfort zone and make a real impact building better software, this is the job for you!  

Responsibilities

• Take ownership of designing, building, and maintaining complex frontend solutions, ensuring they are performant, scalable, and robust.

• Collaborate closely with backend engineers, product stakeholders, and designers to refine requirements and deliver high-quality features.

• Contribute to the evolution of frontend architecture, supporting the adoption of modern tools, frameworks, and best practices.

• Uphold strong standards around code quality, testing, and release processes to ensure reliable delivery.

• Identify and drive improvements in development processes, tooling, and overall product quality.

• Share knowledge within the team, encourage continuous learning, and support less experienced engineers through guidance and collaboration.

• Communicate effectively with stakeholders, providing clear updates on progress, risks, and technical considerations.

What you'll bring

• Proven experience in developing frontend applications using TypeScript.

• Strong command of modern frameworks such as React and Remix, particularly within modular or distributed frontend architectures.

• Solid understanding of core web concepts, including DNS, web servers, and microfrontend approaches.

• Practical experience working with REST APIs, JSON, and GraphQL in distributed systems.

• Good knowledge of frontend testing practices and tools like Playwright and Jest, including testing independently deployed components.

• Experience with CI/CD processes and contemporary deployment strategies, especially across multiple applications.

• Awareness of accessibility guidelines and user experience best practices across both shared and standalone interfaces.

• Strong foundation in software engineering principles, with attention to performance, security, and scalability.

• Effective problem-solving skills and the ability to communicate clearly when collaborating across teams.

• Excellent command of English (written and spoken)