Full Stack Developer AI Solutions (m/f/x)
Berlin, Düsseldorf, Frankfurt, Hamburg, Munich, Stuttgart, Vienna, Zurich
Development
Salesfive
Role
Your new workday:
As a Full Stack Developer in AI Solutions (m/f/x), you build internal applications that use Large Language Models to optimize workflows, automate processes, and make knowledge intuitively accessible for teams. You work end to end across the entire technical stack — from idea to release.
You take ownership of frontend, backend, and the integration of AI capabilities. You connect systems, develop high-performance APIs, and leverage modern models to deliver intelligent assistants, automations, and search experiences. Together with internal partners, you translate complex or still unclear requirements into robust, scalable software that creates real value.
Tasks
How you successfully bring modern AI solutions to life:
- Build and maintain internal web applications from concept to release
- Develop LLM-powered features such as chat, assistants, automations, and knowledge search
- Create and integrate MCP servers and related tools to connect models with internal systems
- Integrate applications with external AI platforms and internal data sources
- Design and implement APIs, services, and data pipelines to support AI functionality
- Ensure solutions are secure, reliable, observable, and maintainable
- Collaborate with business partners to turn unclear needs into production-ready software
What you should bring with you:
- Strong full-stack development experience across frontend and backend
- Hands-on experience building applications that integrate LLMs and retrieval-based systems
- Solid understanding of LLMs and RAG, including interest in model behavior, prompting, context management, and technical trade-offs
- Knowledge of MCP servers and common tool integration patterns
- Ability to work autonomously and make sound decisions with limited guidance
- Experience using AI-powered coding tools in day-to-day work
- Experience with evaluation and quality practices for AI features
- Knowledge of security, privacy, and security aspects of AI systems
- Experience building internal platforms or productivity tools
Our Team Spirit
Work in a dynamic, international team with flat hierarchies and an appreciative company culture.
Time Flexibility
In addition to 30 days of paid vacation and various support options for parents, you also have the opportunity to take a sabbatical or unpaid leave with us.
Location Flexibility
Our hybrid work model gives you the freedom to choose between working from home or the office. You can also work remotely within the EU for up to four weeks per year.
Comprehensive Onboarding
Look forward to an exciting onboarding experience, followed by our Academy program and your personal buddy to guide you through the first few months.
Thoughtful Learning & Development
Benefit from diverse training and certification opportunities, including a personal development budget and 2.5 paid training days per year.
Team Events
Enjoy many memorable moments with us, such as our summer event, Christmas party, Salesfive & Friends events, and much more.
Individual Benefit Packages
We want your benefits to fit you and your lifestyle. That’s why you can customize your individual package based on your personal needs.
Exciting Perspectives
Plan your next career steps with us in a permanent position.
Monetary Appreciation
You will receive an attractive compensation model, including a performance-based bonus.
Go to application
Sounds like what you’re looking for?
We’re very excited to get to know you, your strengths, and your talents. Use our application form to send us your documents. If you have any questions, feel free to contact us at recruiting@salesfive.com.