Senior Full Stack Engineer (m/f/d)
Help Shape How Millions Of Users Discover Products Team Discover owns a core part of the customer journey at intersport.de search, navigation, category pages, filters and recommendations. Our work directly impacts how customers explore products and how the business grows. We are a small, empowered product team with end to end ownership. That means we take responsibility for what we build and how it performs in production. We are looking for a Senior Full Stack Engineer with strong frontend expertise who enjoys solving product relevant problems, working across the stack, and taking real ownership. What You Will Do * Build and improve user facing experiences across search, navigation, category pages, filters, and recommendations * Develop and maintain frontend applications with a strong focus on performance, scalability and usability * Contribute to backend services, APIs, and event driven systems where needed * Help shape technical decisions across architecture, tooling and build vs buy questions * Work closely with Product, Design, and Engineering to define and deliver impactful solutions * Take ownership from idea to production, including quality, performance and operational stability What we are looking for * Several years of experience building and shipping complex web applications * Strong frontend expertise with modern TypeScript based frameworks * Solid full stack engineering skills and willingness to work across frontend and backend * Experience with server side rendering and performance oriented web development * Good understanding of system design, APIs, databases and cloud based architectures * Product mindset and the ability to balance technical quality with business impact * Ability to ensure observability of systems in production, including metrics, logging, tracing, and alerting * Experience with backend technologies such as Kotlin / Spring Boot, event-driven systems (e.g. Kafka), and cloud environments (AWS), or strong ability to ramp up quickly * High level of ownership, self direction and comfort working in an autonomous team * Strong communication skills in German and English Nice to have * Experience with microfrontend architectures * Experience with Kotlin, Spring Boot, Kafka, PostgreSQL, or DynamoDB * Experience with AWS and infrastructure as code * Experience in ecommerce or product discovery environments * Experience using AI tools pragmatically to improve development workflows, productivity, and code quality Our current tech stack Frontend: Preact, Vite, SSR, TypeScript, PostCSS, microfrontends Backend: Kotlin, Spring Boot, Kafka, PostgreSQL, DynamoDB Infrastructure: AWS, Pulumi, GitLab CI/CD Tooling: Datadog, Algolia, Unleash, Vitest, Playwright You do not need to match every technology in our stack. We care more about strong engineering fundamentals, curiosity, and the ability to learn.