Principal AI Engineer

Google Chrome Microsoft Edge Apple Safari Mozilla Firefox Principal AI EngineerFull-timeCompany DescriptionWe are seeking a Senior/Principal AI Engineer to join our Stellar AdTech Business Unit at Sigma Software. This is a full-time role with a flexible hybrid/remote work option, ideal for an experienced professional passionate about designing production-grade agentic AI systems and influencing solution architecture for global AdTech clients.You will work with cutting-edge multi-agent orchestration frameworks, contribute to presales activities, and design custom AI models that power large-scale, enterprise-ready solutions. Why Join Us: Be part of a 300+ strong AdTech competence center, collaborate with top-tier global clients, and help shape the future of AI in advertising technology.PROJECTOur Stellar AdTech Business Unit specializes in Advertising Technology solutions and has been delivering innovative systems to global AdTech leaders and startups since 2008. In this role, you will architect scalable AI-powered systems, translate complex business problems into actionable LLM-based solutions, and support presales by defining AI use cases, architectures, risks, and implementation roadmaps.Job Description Consult clients during presales to assess AI readiness, constraints, and success criteria, translating visions into actionable requirementsPrepare and present presales deliverables including architecture diagrams, assumptions, risks, estimates, scalability considerations, and implementation roadmapsDefine AI use cases and agentic scenarios based on client needsSelect and justify LLMs per use case based on requirements, cost, latency, safety, capabilityArchitect multi-agent frameworks with orchestrator agents and MCP-style protocolsDesign and implement single-agent/multi-agent AI systems with defined roles, tool access, memory, safety boundariesBuild orchestration logic (routing, delegation, retries, fallback strategies, consensus, human-in-the-loop flows)Develop RAG pipelines (data ingestion, chunking, embeddings, vector databases, hybrid retrieval, relevance optimization)Implement learning & feedback loops for continuous agent improvementDesign custom or adapted models (prompt-tuned agents, LoRA fine-tuning, domain-inherited models)QualificationsDesigning and building AI-powered systems in production Agentic frameworks, multi-agent collaboration, orchestrator/worker models RAG pipelines, relevance tuning Python and/or TypeScript, API design, microservices, cloud-native architectures Presales consulting, translating business problems into AI solutions Additional requirements:Practical knowledge of multiple LLM providers (OpenAI, Anthropic, open-source)Ability to build/adapt models (prompt-tuned agents, LoRA fine-tuning, inheritance from foundation models)Knowledge of AWS Bedrock, Azure OpenAI, GCP Vertex AIUnderstanding governance, security, data residency, pricing models, enterprise integration for cloud AI platformsProduction-grade mindset: observability, logging, security, PII handling, cost-efficiencyStrong communication skills for explaining AI concepts to non-technical stakeholdersEnglish level: Upper-IntermediateExperience: 5+ years in AI engineering or related rolesWILL BE A PLUSExperience in AdTech domainExperience integrating AI into legacy or enterprise systemsFamiliarity with workflow automation toolsKnowledge of DevOps practices, CI/CD, containerizationBy clicking the link above or any third-party link within this posting, you are leaving this site and going to a third-party website where the third-party website's terms and privacy policy applyI'm interestedI'm interestedI'm interestedRefer a friendshare this jobShare to WeChat×Copy the link and open WeChat to share.Copy to clipboardOpen WeChatShare to WeChat×Use Scan QR Code in WeChat and click ··· to share.