Senior Fullstack Engineer – Developer Platform (f/m/d)

JTL-Software-GmbH; Germany (OH); On-site; USD 79,944 - 114,207; Full time

Job summary

JTL is building a Developer Platform within the AI & Cloud Platform department. We focus on frontend and backend standards, reusable templates, and scalable platform capabilities to support the company’s e-commerce software.

You will contribute across frontend (React, TypeScript, Storybook, TailwindCSS) and backend (.NET 8, C#), shaping our internal tooling and developer experience. This role offers opportunities to work across infrastructure and product teams.

Qualifications

• You have several years of professional experience in fullstack development.
• You are strong in one stack and solid in the other: React and TypeScript on the frontend, .NET 8 / C# on the backend.
• Frontend: component-based development and design systems (Storybook, TailwindCSS).

Responsibilities

• You work on platform topics that matter most right now, with focus shifting quarterly.
• You develop standards, guidelines, and best practices for frontend and backend at JTL.
• You create and maintain templates, boilerplates, and libraries to help other teams be productive.
• You support the bootstrapping of new projects so standards are applied from the start.
• You regularly evaluate new technologies and assess their value for our landscape.

Skills

Full-stack development

React

TypeScript

.NET 8 / C#

Storybook

TailwindCSS

Job description

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.

About the team

We’re the Developer Platform team within the AI & Cloud Platform department, and we build the foundations the other engineering teams at JTL rely on. Our work spans three areas:

• Developer Enablement: engineering standards, shared tooling, CI/CD, and internal developer documentation that make product teams more productive.
• Cloud Platform Enablement: self‑party apps, from deployments and infrastructure to identity and API management.
• External Developer Relations: public developer documentation, SDKs and CLIs, our public APIs and API gateway, and developer community and events.

Your responsibilities

• You work on the platform topics that matter most right now. Our focus shifts each quarter depending on where the company needs it most — sometimes frontend, sometimes backend, sometimes infrastructure
• You develop standards, guidelines, and best practices for frontend and backend at JTL
• You create and maintain templates, boilerplates, and libraries that help other teams work more productively and efficiently
• You support the bootstrapping of new projects, so our standards and toolchains are applied from the start
• You regularly evaluate new technologies and assess their value for our landscape

Your profile

• You have several years of professional experience in fullstack development
• You are strong in one stack and solid in the other: React and TypeScript on the frontend, .NET 8 / C# on the backend
• Frontend: component-based development and design systems (Storybook, TailwindCSS),