Senior Full Stack Engineer (m/f/d)

INTERSPORT Digital GmbH; Heilbronn; Vor Ort; EUR 60.000 - 80.000; Vollzeit

Zusammenfassung

INTERSPORT Digital GmbH in Heilbronn is seeking a Senior Full Stack Engineer to enhance the customer journey on intersport.de. You will build and improve user-facing experiences while working collaboratively across the product team. The ideal candidate has a strong foundation in frontend development with TypeScript frameworks and solid full stack engineering skills, as well as experience in cloud environments and backend technologies. This role offers an opportunity to take full ownership of projects from inception to production.

Qualifikationen

• Several years of experience building and shipping complex web applications.
• Experience with backend technologies such as Kotlin / Spring Boot and cloud environments (AWS).
• High level of ownership and self-direction.

Aufgaben

• Build and improve user-facing experiences across search and navigation.
• Develop and maintain frontend applications with a focus on performance.
• Take ownership from idea to production, including quality and operational stability.

Kenntnisse

Frontend expertise with modern TypeScript based frameworks

Full stack engineering skills

Server side rendering experience

Communication skills in German and English

Cloud based architecture knowledge

Tools

Kotlin

Spring Boot

Kafka

PostgreSQL

DynamoDB

AWS

GitLab CI/CD

Jobbeschreibung

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.