GenAI Platform Engineer for Production LLM Apps

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

Job summary

Sigma Suisse, based in Plan-les-Ouates, is assisting a leading international group in Geneva to find an Artificial Intelligence Engineer for their AI platform team. You will design and build production-ready generative AI solutions.

This hands-on engineering role focuses on LLM platforms, agentic workflows, enterprise knowledge systems and reusable AI services across data retrieval, analysis and decision making.

Qualifications

• Strong software engineering fundamentals with production systems
• Delivery of LLM-based applications or AI platforms in production, not just PoC
• Proficiency in Python API and service development
• Experience with foundation model APIs and platforms (OpenAI, Anthropic, Vertex AI, AWS Bedrock)
• Familiarity with agent frameworks and orchestration tools (LangGraph, LangChain, LlamaIndex, CrewAI)
• Experience with vector databases, semantic search, retrieval and reranking
• Knowledge of containerisation and production AI deployment
• Degree in CS/ML/Math/Data Science or equivalent

Responsibilities

• Build RAG services end to end (ingestion, parsing, indexing, retrieval, reranking)
• Develop platform capabilities for LLM applications and enterprise knowledge solutions
• Define architectures, standards, and patterns for GenAI applications
• Set interoperability standards across models, tools, and agents
• Design agentic workflows interacting with internal APIs, databases and third-party services
• Create reusable components, APIs and libraries for engineering teams
• Evaluate LLM, retrieval and agent performance with metrics, datasets and tests
• Implement safeguards against prompt injection and data leakage
• Arbitrate trade-offs across model quality, latency, cost and resilience
• Collaborate with security and compliance in regulated environments

Skills

Strong software engineering

LLM-based application delivery

Python API development

OpenAI LangChain experience

Cloud deployment/containers

English fluency

Education

Degree in Computer Science or related field

Tools

LangGraph

LangChain

LlamaIndex

CrewAI

OpenAI API

Vertex/Bedrock platforms

Job description

Sigma Suisse, based in Plan-les-Ouates, is assisting a leading international group in Geneva to find an Artificial Intelligence Engineer for their AI platform team. You will design and build production-ready generative AI solutions.

This hands-on engineering role focuses on LLM platforms, agentic workflows, enterprise knowledge systems and reusable AI services across data retrieval, analysis and decision making.