Senior Software Engineer (Java/Kotlin)

More about this roleEverything you need to know.OverviewSenior Software Engineer (Java/Kotlin)(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 contractPrivate 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 jobAbout the role   We are looking for a highly motivated and experienced Senior Backend Engineer to join our Software Engineering team. You will be working across the full software development lifecycle and contributing to the design and delivery of a greenfield Loyalty Platform built using Java and the Spring ecosystem. In this role, you will help shape the core backend services that power our loyalty capabilities, working closely with product managers, engineers, and other stakeholders to turn ideas into scalable, high-quality solutions. You will be involved from early design and architectural decisions through to implementation and production readiness. 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  Build and evolve backend components that form the core of a new Loyalty Platform, using Java and Spring. Lead the delivery of backend solutions, contributing from early technical discovery through implementation and live operation. Work closely with product and engineering partners to shape requirements and turn them into robust, scalable services. Influence platform architecture and technical standards as the system is being designed and grown from the ground up. Maintain a strong focus on code quality, reliability, and performance through testing, reviews, and continuous refinement. Support modern delivery practices, including continuous integration, automated deployments, and iterative releases. Ensure services are resilient and operable in production, with appropriate logging, monitoring, and support processes in place. Act as a senior technical contributor within the team, sharing knowledge, supporting less experienced engineers, and raising the overall engineering bar. What you'll bringExtensive hands-on experience delivering backend solutions in Java, with exposure to Kotlin in commercial or production settings. Strong practical knowledge of the Spring framework, with the ability to apply common design patterns to solve complex engineering problems. Experience designing backend systems with scalability and maintainability in mind, including service-based and distributed architectures. Practical experience working in AWS environments, covering application deployment, configuration, and day-to-day operation. Familiarity with modern software delivery approaches, such as automated testing, continuous integration, and incremental releases. Confidence contributing to technical discussions and shaping implementation approaches, particularly in early-stage or greenfield projects. A pragmatic engineering mindset, balancing clean design with delivery, performance, and operational considerations. Strong collaboration skills and experience working within Agile, cross-disciplinary teams. Excellent command of English (written and spoken) Rewards & BenefitsWhat we offer.Private Health CarePrivate medical healthcare at LUXMED (including dental care) for you and your family.Child InsuranceInterRisk - insurance for children.Sports CardMedicover sports card (Fit&More package).CoursesLanguage courses, accounting courses, access to LinkedIn Learning and the possibility of co-financing studies and certification.Life AssuranceLife insurance at Generali financed by the employer.BonusOpportunity to earn annual bonus that aligns to work level of role.ParkingParking spaces and LOTOS card.Kingfisher Pension SchemeCo-financing of monthly tickets.Transport DiscountCo-financing of monthly tickets for the public transport in Krakow (50% discount).