Backend Developer (f/m/d) - .NET

Your mission

JTL is one of the leading providers of e-commerce software in the German-speaking region, with around 450 employees across the group and more than 50,000 customers across a wide range of industries. We develop scalable, flexible solutions for the online retail of the future — from ERP systems to shop and marketplace integrations.

As a Backend Developer at JTL, you will help develop and modernize the backend services and business logic that power our software platform. You'll work with modern .NET technologies and contribute to the ongoing evolution of our products toward modular architectures, modern APIs, and cloud-ready solutions.

We believe software development is about more than writing code. We value quality, maintainability, collaboration, and continuous learning.

AI-assisted development is part of our daily work. Our engineers use tools such as GitHub Copilot, Claude Code, and ChatGPT to support coding, refactoring, debugging, and documentation. We expect you to have experience with these tools or a willingness to learn and use them effectively.

Your Responsibilities
Develop and maintain backend services and business logic using C# and .NET
Contribute to the modernization and continuous improvement of our software platform
Design, implement, and maintain REST and GraphQL APIs
Improve existing code, data structures, and technical workflows
Write automated tests and support quality-focused development practices
Participate in code reviews and collaborate with other engineers
Work closely with product managers, QA engineers, and frontend developers

Your profile

Experience developing software with C# and .NET
Good understanding of software design and clean code principles
Experience working with relational databases, ideally Microsoft SQL Server
Experience designing or integrating APIs
Ability to work effectively in an existing codebase
Experience with automated testing
Strong problem-solving and analytical skills
Experience with AI-assisted development tools or willingness to adopt them
Good German and English communication skills

Helpful Experience
ASP.NET Core
Entity Framework
GraphQL
Azure
Docker
Experience with modularization or modernization projects
Experience with ERP, e-commerce, or enterprise software

Why us?

Remote-first within Germany, with the option to work remotely from eligible countries for up to 180 days per year
Meal allowance of up to €115 net per month
Ergonomic workspace allowance for your home office setup
Regular team events, company-wide gatherings, and summer and Christmas parties to stay connected as a remote-first company
EGYM Wellpass and JobRad subsidy
Financial benefits including capital-forming payments (Vermögenswirksame Leistungen) and a company pension scheme

About us

JTL is one of the leading providers of e-commerce software in the German-speaking region – with around 450 employees across the group and 50,000 customers from a wide range of industries. We develop scalable, flexible solutions for the online retail of the future – from ERP systems to shop and marketplace integrations.
Fairness and respect are part of our everyday practice. Are you committed, curious, and eager to work in a team while taking on responsibility? Are you looking for a job where Monday isn’t the worst day of the week? Then we look forward to receiving your application!