Senior AI E-Commerce Engineer (m/f/d) "Superprompter"

Since 2006, signTEK has been building demanding e-commerce solutions for manufacturers, retailers and brands, B2B and B2C. Today we work AI-first: in development, in project management and in administration.

You have strong expertise and use AI to get much more out of it? Then we should meet.

What we mean by Superprompter

You use your expertise to steer AI to results that work for the client. Whether it's Claude, ChatGPT, Gemini or Marvin, our own AI assistant: what counts is what you build with it.

Our stack

We work with Intershop (Java) and Shopware (PHP/Symfony), plus headless frontends and PWAs in TypeScript with Vue, Angular and Node. Your e-commerce domain knowledge matters more than any specific system: with AI, you can get into any of them.

Your focus

You work in one of two focus areas, development or DevOps. Tell us in your application which one suits you better.

• Understand requirements: You analyse requirements, structure the problem and build context from briefings, documentation and code.
• Steer AI: You choose the right tools and AI agents and steer AI to a result that works for the client.
• Development: You build shop features and integrations with third-party systems such as ERP, PIM, CRM or payment, have AI agents generate code, and review and test it.
• DevOps and infrastructure: You look after hosting, deployments and monitoring, and automate operations and maintenance with AI.
• Ensure quality: You spot mistakes, question suggestions, test and take responsibility for quality.
• Share knowledge: You share what works with the team and keep improving our AI workflows.

What you bring

• Experience: 5 to 7 years in development or DevOps, ideally in e-commerce.
• AI in practice: You use AI regularly for real tasks and can show concrete results.
• Structure: You structure complex tasks, ask targeted questions and spot technical errors.
• Independence: You work independently, try out new tools and can explain your decisions.
• Communication: You communicate confidently in German and English, including directly with clients.

What awaits you

• Real projects, free hand: You work with AI on live client projects, not in a lab, and bring in new tools, AI agents and workflows yourself.
• Salary: EUR 65,000 to 85,000 gross per year (full-time), depending on experience and focus area. The upper end is for senior profiles with lead experience. On top: a company pension and private supplementary health insurance.
• AI tools included: Paid access to Claude, ChatGPT and Gemini, plus Marvin, our own AI assistant.
• Hybrid, flexible and central: Tuesday to Thursday in the office, a few minutes from Mannheim central station, Monday and Friday remote. You agree on flexible working hours with your team.
• Around the table: Hot lunch at the office and regular team events.
• The usual, done well: 30 days of annual leave, a training course every year, JobRad bike leasing and high-quality hardware. No wonder we're a kununu Top Company 2022 to 2026.

Show us how you work with AI

Apply via the "Apply now" button. Upload your CV or link your LinkedIn or GitHub profile, and tell us your earliest possible start date. No cover letter needed. Instead, answer this: What have you built with AI that surprised even you, and how did you check its quality? And tell us whether you see yourself more in development or in DevOps. And: What do you expect from a company that takes AI seriously?

The position is available from 1 December 2026. You will hear from us within 5 working days. Next, we get to know each other in a conversation. If it's a fit, a hands-on task follows, and AI is explicitly allowed. We review your result together. Your contact is Steffen Höpfinger.