Senior Software Engineer (React)

Overview

Senior Software Engineer (React) 

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 be responsible for delivering high-quality, scalable solutions that support long-term business objectives. You will contribute as a strong individual contributor while working collaboratively with team members to address complex technical challenges and uphold engineering best practices. With a strong focus on frontend technologies and quality, you will play an important role in strengthening the technical capability and impact of 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  

• Lead the design, implementation, and ongoing maintenance of advanced frontend solutions, ensuring they are scalable, reliable, and efficient. 

• Work closely with backend engineers, product partners, and designers to clarify requirements and deliver well-crafted features. 

• Support the ongoing development of frontend architecture and help the team adopt modern technologies and practices. 

• Promote high standards in code quality, testing, and release practices to enable dependable delivery. 

• Proactively identify opportunities to improve development workflows, tooling, and overall product quality. 

• Actively share knowledge, foster a learning-focused team culture, and provide support to less experienced engineers through collaboration and mentoring. 

• Maintain clear and effective communication with stakeholders, sharing updates on delivery progress, risks, and technical topics. 

What you'll bring

• Strong experience designing and building frontend applications using TypeScript, HTML, and CSS. 

• Proficiency with modern frameworks such as React.js and Remix, applied in modular and distributed frontend systems. 

• Good understanding of web architecture, including DNS, web servers, and support for microfrontend solutions. 

• Hands-on experience integrating RESTful APIs, JSON, and GraphQL within distributed architectures. 

• Solid knowledge of frontend testing tools such as Playwright and Jest, including testing independently deployed modules. 

• Experience with CI/CD pipelines and modern deployment practices, particularly in multi-application environments. 

• Familiarity with accessibility standards and user experience best practices across shared and standalone components. 

• Strong understanding of software and quality engineering principles, including performance, security, and scalability. 

• Excellent problem-solving abilities and clear communication skills for effective cross-team collaboration. 

• Excellent command of English (written and spoken)