(Senior) Backend / Fullstack Engineer - Marketplace - STACKIT (m/f/d)

Schwarz Digits; Friedrichshall; Remote; EUR 70,000 - 100,000; Full time

Job summary

Schwarz Digits, the IT and digital division of the Schwarz Group, invites a Backend/Fullstack Engineer to build and operate the STACKIT Marketplace services. You will design scalable Go backends and BFFs, delivering high-performance REST and gRPC APIs.

Collaborating with UX designers, you will translate wireframes into responsive interfaces, ensure code quality with unit and integration tests, and help evolve our frontend stack in an agile, cross-functional environment.

Qualifications

• Several years of professional software engineering experience with backend focus (Go, microservices, API design).
• Experience designing and building scalable backend services and microservice architectures.
• Frontend knowledge with Angular/TypeScript is a plus for fullstack profiles, not mandatory.

Responsibilities

• Design, implement, and operate STACKIT Marketplace applications (Go backend or fullstack).
• Develop scalable backend services and Backend-for-Frontend (BFF) architectures with REST/gRPC APIs.
• Collaborate with UX designers to translate wireframes into responsive, accessible interfaces.
• Ensure high software quality through unit and integration tests.
• Contribute to evolving frontend tech stack and participate in agile team processes.
• Share knowledge through code reviews and establish best practices.

Skills

Go (Golang)

REST API design

Microservices

Angular

TypeScript

CI/CD pipelines

Docker

Kubernetes

Tools

Webpack

NX

npm

yarn

GitHub Actions

Azure DevOps

Job description

Introduction text

Schwarz Digits creates the technological foundation for digital sovereignty in Europe. As the IT and digital division of the Schwarz Group, we develop and manage the IT infrastructures for the retail divisions Lidl and Kaufland, as well as Schwarz Production and PreZero. At the same time, we operate as an independent provider in the external market to support companies across Europe in their digital transformation. We bundle our core services in the areas of Cloud, Cyber Security, Data & AI, Communication, and Workspace.Join us and contribute to digital sovereignty in Europe. With us, you will work at the intersection of agility and security: You will benefit from fast decision-making processes, enjoy genuine creative freedom in your projects, and be able to build upon the stable foundation of the Schwarz Group.

Here, you will shape the face and services of our cloud: You will develop the STACKIT Portal and Marketplace, the central interface for our customers - from robust backend services to the user interface.

Your Tasks

• You build it, you run it! You take responsibility for the design, implementation, and operation of our applications in the STACKIT Marketplace – focusing on Go backend services or acting as a versatile fullstack developer.
• Go & Backend Specialist: You design and develop scalable backend services and Backend-for-Frontend (BFF) architectures in Go (Golang), providing high-performance REST and gRPC APIs.
• UX/UI Realizer: In close collaboration with our UX designers, you transform wireframes and prototypes into pixel-perfect, responsive, and accessible user interfaces that delight our customers.
• Quality First: You don’t just write code; you guarantee the highest software quality through unit tests and end-to-end tests.
• Teamplayer & Visionary: You work agilely with Product Owners and Backend Engineers to turn technical visions into reality and actively drive the further development of our frontend tech stack.
• Mentor & Coach: You enjoy sharing your knowledge! You support your colleagues with code reviews and establish best practices in the our domain.

Your Profile

• Backend or Fullstack Engineer: You have several years of experience in professional software engineering, primarily focused on backend development (Go, microservices, API design) or fullstack development.
• Go & API Enthusiast: You master Go (Golang) or a comparable modern backend language and have deep expertise in REST API design and microservice architecture.
• Frontend Experience (Optional / Plus): Knowledge of Angular, TypeScript, and modern web architectures is a major plus for fullstack profiles, though optional for pure backend specialists.
• Tooling Pro: You are familiar with build tools (Webpack, NX), package managers (npm, yarn), and have experience setting up CI/CD pipelines (e.g., with GitHub Actions or Azure DevOps) for frontend deployments.
• Cloud Affinity: Basic knowledge of Docker and Kubernetes is a plus, as you work in a "You build it, you run it" environment and can deploy your containers yourself.
• Problem-Solver: Complex UI logic or asynchronous data streams don’t make you sweat – your analytical skills help you find elegant solutions.
• Teamplayer: You are a communication pro and enjoy working agilely in a team that pushes each other.
• Communication: English (spoken and written) is a must, as we are positioned internationally. German is a plus.