GenAI Platform Engineer – Production LLM & RAG Systems

Sigma Suisse; Genf; On-site; CHF 120,000 - 180,000; Full time

Job summary

Sigma Suisse in Plan-les-Ouates, Geneva region, seeks an Artificial Intelligence Engineer to join the AI platform team. You will design and build production-grade AI services, enabling engineering teams to ship reliable GenAI solutions, including RAG, agentic workflows, and enterprise knowledge systems.

You will lead end-to-end implementation, set standards, and ensure safe, scalable deployment across internal APIs, databases, and third-party services.

Qualifications

• Production-grade AI platforms delivery experience.
• Experience with Python API and async frameworks.
• Experience with major LLM providers (OpenAI, Anthropic, Vertex AI, Bedrock).
• Familiarity with vector stores and semantic search.
• Fluent English; eligible to work in Switzerland.

Responsibilities

• Build end-to-end RAG services: ingestion, parsing, indexing, retrieval, and reranking.
• Develop shared platform capabilities for LLM applications and agentic systems.
• Define reference architectures and implementation patterns for GenAI apps.
• Set interoperability standards across models, tools and agents.
• Design agentic workflows interacting with internal APIs, databases, and search systems.
• Create reusable components, APIs, and libraries for product teams.
• Evaluate LLM performance with metrics, datasets and testing.
• Design safeguards against prompt leakage, unsafe tool execution and model issues.
• Arbitrate trade-offs across quality, latency, cost and observability.

Skills

Software engineering fundamentals

Python API development

LLM platforms

Cloud & containerization

Engineering安全 in regulated env

English communication

Education

Bachelor's degree in Computer Science or related field

Tools

LangGraph

LangChain

LlamaIndex

OpenAI API

Job description

Sigma Suisse in Plan-les-Ouates, Geneva region, seeks an Artificial Intelligence Engineer to join the AI platform team. You will design and build production-grade AI services, enabling engineering teams to ship reliable GenAI solutions, including RAG, agentic workflows, and enterprise knowledge systems.

You will lead end-to-end implementation, set standards, and ensure safe, scalable deployment across internal APIs, databases, and third-party services.