You develop and maintain AI-based applications with a focus on Large Language Models (LLMs), chatbot systems, RAG architectures (Retrieval Augmented Generation), and machine learning. You work with modern AI frameworks such as LangChain, Hugging Face, or OpenAI APIs and implement them in production applications. You implement intelligent document processing pipelines, build RAG systems for context-aware AI responses, develop prompt engineering strategies, and optimize AI models for specific use cases. You work independently in an agile team and bring innovative AI solutions to production maturity.
Responsibilities
Who we are looking for?
What you should bring:
- Professional training or degree in Computer Science, Data Science, AI, or comparable qualification
- Excellent Python skills and experience with ML/AI frameworks
- Practical experience with Large Language Models and prompt engineering
- Knowledge of RAG systems and document processing
- Experience with vector databases and embedding technologies
- Knowledge of data analysis and machine learning pipelines
- Passion for AI technologies and innovative solutions
- Analytical thinking and problem-solving skills
- Good German and English language skills
Required Skills
Education
Professional training or degree in Computer Science, Data Science, AI, or comparable qualification
Python
Excellent knowledge of Python for ML/AI development
LLM Frameworks
Experience with LangChain, LlamaIndex, or similar frameworks
AI APIs
Practical experience with OpenAI, Anthropic Claude, or open-source LLMs
Prompt Engineering
Strong knowledge in prompt engineering and LLM optimization
Data Analysis
Experience in data analysis with pandas, numpy, and scikit-learn
Vector Databases
Knowledge of vector databases (Pinecone, Weaviate, ChromaDB, pgvector)
RAG Systems
Experience in building Retrieval Augmented Generation systems
Document Processing
Knowledge in document parsing, chunking, and embedding strategies
Preferred Skills
Machine Learning
Experience with TensorFlow, PyTorch, or Hugging Face Transformers
FastAPI
Knowledge of FastAPI for API development
Docker & Kubernetes
Experience with container technologies for ML deployments
Databases
Knowledge of SQL (PostgreSQL) and NoSQL (MongoDB, Redis)
MLOps
Experience with MLflow, Weights & Biases, or similar tools
Cloud Platforms
Knowledge of AWS, Azure, or Google Cloud for AI services
NLP
Understanding of Natural Language Processing and language models
Frontend Integration
Basic knowledge in Vue.js, React, or similar frameworks
Elasticsearch
Knowledge of Elasticsearch for hybrid search (keyword + semantic)
Document Processing Libraries
Experience with PyPDF2, unstructured, LangChain Document Loaders
Why Helm & Walter? What we offer you
Work Environment
Modern hardware and access to current AI tools and technologies
Working Hours & Vacation
Very flexible working and vacation times, even on short notice
Innovation
Work on exciting AI projects with cutting-edge technologies
Professional Development
Budget for conferences, training, and AI certifications
Team Culture
An innovative team focused on AI development and knowledge sharing
What you can expect from us:
- Permanent employment and performance-based salary
- Very flexible working hours and vacation time - even at short notice
- Air-conditioned and ergonomic workplace according to your wishes
- Modern development tools and methods
- Free drinks and snacks
- A friendly, uncomplicated work environment and respectful "Du" culture
- Opportunities to contribute and develop yourself and us further
- A strong team that doesn't leave you alone
- Diverse tasks, partly according to your own interests and strengths