Senior Full Stack Engineer (m/f/d)

INTERSPORT Digital GmbH; Germany (OH); On-site; USD 90,000 - 120,000; Full time

Job summary

INTERSPORT Digital GmbH in Ohio is seeking a Full Stack Engineer to build and improve user experiences on their platform. This role involves developing frontend applications and contributing to backend services using TypeScript and Kotlin. Ideal candidates should have several years of experience with web applications, strong communication skills in German and English, and a track record of ownership and self-direction. Join a dynamic team dedicated to enhancing product discovery and user engagement.

Qualifications

• Several years of experience building and shipping complex web applications.
• Strong frontend expertise with modern TypeScript based frameworks.
• Ability to ensure observability of systems in production.

Responsibilities

• Build and improve user facing experiences across search, navigation, and recommendations.
• Develop and maintain frontend applications focusing on performance and usability.
• Contribute to backend services, APIs, and event-driven systems.

Skills

TypeScript expertise

Full stack engineering

Server side rendering

System design

Cloud architectures

Communication in German and English

Ownership and self-direction

Tools

Kotlin

Spring Boot

AWS

Kafka

PostgreSQL

DynamoDB

Job description

Overview

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.

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

Frontend: Preact, Vite, SSR, TypeScript, PostCSS, microfrontends

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.