Lead Software Engineer

Lead 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. Interested? Great, apply now and help us to Power the Possible.

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

• Up to 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

About the role

As part of Kingfisher's Engineering Centre in Krakow, we are expanding our teams dedicated to Castorama Polska – one of the country's most recognized DIY retail brands. These teams will be shaping the future of retail by building and evolving Castorama's mobile app, e-commerce platform, and the back-office systems that power store operations across Poland. If you join us, you will not just be writing code – you will be directly influencing how millions of customers shop, browse, and interact with their local Castorama stores. From launching a new generation of mobile apps to streamlining in-store tech, your work will have a real, visible impact in your own backyard.

As a Lead Software Engineer within our frontend domain, you will play a pivotal role as both an expert individual contributor and a technical multiplier. You will be responsible for guiding your squad through complex and often ambiguous challenges, ensuring the delivery of high-quality, scalable solutions that align with long-term business goals.

You will provide technical leadership, coach and mentor engineers, and drive engineering excellence across the team. Working closely with Engineering Leads, Principal Engineers and Architects, you will shape technical direction, influence strategic decisions, and foster a strong culture of collaboration, innovation, and continuous improvement. With a passion for frontend technologies and a holistic mindset, you will help elevate both the technical capabilities and the impact of your squad.

Responsibilities

• Provide day-to-day technical guidance, ensuring the team is aligned on priorities, technical approaches, and best practices to meet business goals.
• Foster a culture of growth by mentoring engineers, facilitating skill development, and offering constructive feedback to support their career progression.
• Take ownership of complex frontend solutions, ensuring they are scalable, maintainable, and performant while meeting both short- and long-term objectives.
• Collaborate effectively with cross-functional teams, including backend engineers, product managers, and designers, to define and execute on product vision.
• Contribute to shaping the technical direction of frontend architecture, influencing product and technical roadmaps, and supporting the team in navigating evolving business needs.
• Champion high standards of code quality, testing, and deployment processes to ensure reliability and consistency across frontend systems.
• Identify opportunities for process and technical improvements, proactively leading efforts to enhance the development lifecycle, productivity, and product quality.
• Maintain strong relationships with internal stakeholders, facilitating effective communication and ensuring technical needs and progress are clearly communicated.

Skills and Experience

• Proven ability to design and deliver robust, high-quality solutions across multiple programming languages and frameworks.
• Deep expertise in frontend technologies, including TypeScript, HTML, CSS.
• Extensive experience with modern frontend frameworks such as and Remix.
• Strong knowledge of web architecture, DNS, and web server technologies.
• Hands-on experience working with RESTful APIs, JSON, and GraphQL.
• Expertise in frontend testing tools and frameworks, including Playwright and Jest.
• Skilled in building and maintaining scalable CI/CD pipelines.
• Well-versed in accessibility standards (WCAG) and user experience best practices.
• Demonstrates a strong grasp of software and quality engineering principles and non-functional requirements.
• Exceptional problem-solving capabilities and the ability to lead the implementation of complex solutions.
• Strong stakeholder management and communication skills, with the ability to influence technical discussions and strategic decisions.
• Comfortable operating with autonomy and accountability in a dynamic, fast-paced environment.
• Excellent command of English (written and spoken)