Senior Software Engineer - Full Stack (Merchants)

About the Team Merchant EMEA Engineering builds the technology that helps merchants join, grow, and operate successfully across our markets. Our organization brings together the strengths of Wolt and Deliveroo and supports merchants across 37 countries. We work across the merchant journey, including onboarding, business growth and support, analytics and recommendations, menu and order management, integrations, and merchant applications. Our teams sit close to the business. Rather than primarily building foundational platforms, we build products and features on top of our existing platforms to solve real merchant and market needs, including local business requirements, growth opportunities, and operational challenges. This open role is based in our tech hubs in London. What You'll Do As a Senior Fullstack Engineer , you'll own complex product and technical problems across the merchant experience, from problem definition through design, implementation, production, and ongoing evolution. You'll: Design, build, and operate production systems across backend services and user-facing applications. Lead technically complex initiatives across areas such as merchant onboarding, analytics, recommendations, menu and order management, integrations, or merchant-facing tools. Translate ambiguous business and merchant problems into scalable, pragmatic technical solutions. Drive technical design and architecture decisions, considering scalability, reliability, maintainability, and long-term product needs. Own systems and initiatives end-to-end, from early discovery and design through implementation, rollout, production operations, and iteration. Collaborate closely with product managers, designers, operations, and engineers across teams to align on solutions and delivery. Support and mentor other engineers through design discussions, code reviews, knowledge sharing, and technical guidance. Use AI-assisted development tools effectively to increase engineering velocity, while maintaining strong judgment around correctness, security, maintainability, and quality. Work comfortably outside your primary area of expertise when needed to solve problems end-to-end. How We Work Ownership: Senior engineers take responsibility not only for implementation, but also for understanding the problem, shaping the solution, and ensuring it works successfully in production. Collaboration: We work closely across engineering, product, design, data, and operations. Senior engineers are expected to help drive alignment when problems span multiple teams or areas. Pragmatism: We value simple and maintainable solutions that create business impact without unnecessary complexity. Flexibility: We care more about solving the problem than strict frontend or backend boundaries. Our Tech Stack Our backend services primarily use Go and Kotlin , while our frontend applications use technologies such as TypeScript and React . We also work with technologies including Kafka, PostgreSQL, MongoDB, Redis,