Senior Magento Engineer

At Smartbox Group, we believe in creating unforgettable memories through real-life experiences. With nearly 15,000 experiences across Stays, Wellness, Adventure and Gastronomy, we inspire people to live more and share more. Operating in 11 countries, with 700+ employees and 40,000+ partners, we're committed to making meaningful experiences accessible to everyone. We're looking for a Senior Magento Engineer to own and optimize critical checkout functionality, including payments, promotions, gift vouchers and order fulfilment integrations. You'll focus on building a fast, reliable and scalable checkout experience, particularly during peak trading periods like Christmas. We're looking for someone with strong hands-on Magento 2 production experience who understands performance optimization, scalability and high-traffic eCommerce environments. Why this role Join a team focused on modern technology, engineering quality and continuous improvement. - Modern Tech Stack: Up-to-date Magento Open Source, PHP and well-documented architecture. - Code Quality: Static analysis, mutation testing and automated unit and end-to-end tests. - Fast Deployment: Automated CI/CD pipelines with multiple releases each week. - Scalable Infrastructure: Kubernetes with logging, monitoring and performance tracing. - AI-Driven Development: Integrated AI coding tools to support daily development, testing and code reviews. What you'll do - Build and maintain custom Magento 2 modules for checkout, payments, promotions and vouchers, with tests. - Integrate Magento with payment providers and internal services over REST APIs and message queues. - Find and fix performance problems in caching, indexing, queues and checkout, and help run load tests before peak. - Investigate production issues with logs, metrics and traces, and fix them. - Review code, contribute to technical design and architecture decisions, and improve the CI/CD pipeline when it gets in the team's way. - Use AI tools to write, refactor, review and test code, and check their output before it ships. What you'll bring - Five or more years building and running Magento 2 in production. Experience on Open Source or Adobe Commerce both count. - Solid knowledge of Magento internals: dependency injection, plugins, observers, service contracts, the module system and message queues. Modern PHP (8.x), good object-oriented design, and the habit of writing PHPUnit tests. - Performance work on a busy store: full-page cache, Redis, indexing and MySQL query tuning. - An understanding of observability (logging, metrics and tracing) on a high-traffic store. Enough frontend to work in Magento themes: Knockout.js, RequireJS and Tailwind CSS. Daily use of Docker, Git and CI/CD. Kubernetes experience helps, and we'll get you up to speed if you're newer to it. - Day-to-day use of agentic development tools, such as Claude Code or similar, in your engineering work. - Using AI across the whole development cycle: scaffolding, code generation, refactoring, writing tests, code review, debugging and documentation. The judgement to check, test and take ownership of AI-generated code rather than accepting it as it is. - Good prompting and context management on a real codebase. Experience with MCP-based integrations is a plus. - A cool head under pressure, and the ability to explain trade-offs to engineers, product and QA. Nice to have - Payment gateway integrations at scale. - Getting a store ready for a seasonal peak: load testing, capacity planning, change freezes. - Headless or composable commerce. - Static analysis and mutation testing. What We Offer - 🏡 Flexible Working: Hybrid model + 20 working days abroad annually. - ✅ Core Benefits: Health cover, pension, TaxSaver and extra leave. - 🎁 Flexible Benefits: Health, wellbeing and learning options. - 🌈 Inclusive Culture: Parental leave, Inclusive Day and fair rewards. - 📚 Career Growth: Study assistance and learning opportunities. - 🎉 Extra Perks: Unbox Your World Day + paid sabbatical after 5 years. - 🌍 Transparency: Clear salary bands and career levels.