A Recommendation Systems Engineer designs, builds, evaluates, and operates machine learning systems that personalize user experiences by predicting and ranking the most relevant content, products, or actions for each user in real time and batch contexts. The role sits at the intersection of software engineering, applied machine learning, and product experimentation—turning behavioral signals and content metadata into reliable, scalable recommendation services.

A **RAG Engineer** designs, builds, and operates **Retrieval-Augmented Generation (RAG)** systems that connect large language models (LLMs) to enterprise knowledge—enabling accurate, grounded, and secure answers inside products and internal tools. This role exists because LLMs alone are not sufficient for most enterprise use cases: the business needs **fresh, permissioned, auditable, and domain-specific** responses backed by trusted sources and measurable performance.

The Prompt Optimization Engineer designs, tests, and continuously improves prompts, retrieval strategies, and interaction patterns that drive high-quality outcomes from large language models (LLMs) and related generative AI systems in production software. The role blends applied NLP/LLM engineering, experimentation discipline, and product-quality thinking to reliably convert business intent into precise, safe, and cost-effective model behavior.

The Prompt Engineer designs, tests, and operationalizes prompt- and instruction-based interactions with large language models (LLMs) to deliver reliable, safe, and product-aligned AI features. This role converts product intent and user needs into repeatable prompt patterns, evaluation harnesses, and production-ready prompt configurations that meet quality, security, and cost targets.

The **Principal Synthetic Data Engineer** is a senior individual contributor (IC) responsible for designing, building, and governing enterprise-grade synthetic data capabilities that accelerate AI/ML development while reducing privacy, security, and data access constraints. This role combines deep data engineering and ML knowledge with rigorous privacy/utility evaluation to produce synthetic datasets that are fit-for-purpose for model training, testing, analytics, and product experimentation.

The **Principal Robotics Software Engineer** is a senior individual-contributor (IC) technical leader responsible for designing, building, and evolving the software foundations that enable reliable robotic autonomy at scale—typically across perception, localization, planning, control, and the runtime platform that orchestrates these capabilities. The role blends deep robotics engineering expertise with software architecture, production-grade quality practices, and cross-functional technical leadership across AI & ML, product, and operations.

The **Principal Responsible AI Engineer** is a senior individual contributor who designs, implements, and operationalizes responsible AI (RAI) controls across the end-to-end AI/ML lifecycle—spanning data, training, evaluation, deployment, monitoring, and retirement. This role ensures that AI-enabled products and platforms are **safe, fair, privacy-preserving, secure, explainable where necessary, and governed** in ways that meet internal standards and evolving external expectations.

The **Principal Recommendation Systems Engineer** is a senior individual contributor (IC) responsible for designing, building, and continuously improving large-scale recommendation and personalization systems that drive measurable user and business outcomes (engagement, retention, conversion, satisfaction, and revenue). This role combines deep machine learning expertise with production-grade engineering rigor to deliver low-latency, high-throughput ranking and retrieval services integrated into customer-facing products.

The Principal RAG Engineer is a senior individual contributor responsible for designing, building, and operating Retrieval-Augmented Generation (RAG) systems that deliver reliable, secure, and high-quality AI experiences in production. This role blends applied ML engineering, search/retrieval engineering, distributed systems, and software architecture to ensure LLM-based products are grounded in trusted enterprise knowledge and perform predictably at scale.

The Principal Prompt Engineer is a senior individual-contributor engineering role in the AI & ML organization responsible for designing, standardizing, and operationalizing prompt- and instruction-based interfaces to large language models (LLMs) and multimodal foundation models. This role converts product and business intent into reliable, safe, and cost-effective model behaviors—using prompt systems, retrieval-augmented generation (RAG) patterns, tool/function calling, agent workflows, and evaluation harnesses.

The Principal NLP Engineer is a senior individual contributor (IC) responsible for architecting, building, and operationalizing production-grade natural language processing (NLP) capabilities—often including large language models (LLMs), retrieval-augmented generation (RAG), classic NLP pipelines, and evaluation systems—at enterprise scale. This role translates ambiguous product and platform needs into reliable language intelligence services that are secure, measurable, and maintainable.

The Principal MLOps Engineer is a senior individual contributor responsible for designing, standardizing, and scaling the end-to-end systems that reliably deliver machine learning models into production. This role bridges ML engineering, data engineering, DevOps/SRE, and security to ensure models are deployable, observable, governed, cost-efficient, and continuously improving.

The **Principal Machine Learning Engineer** is a senior individual contributor (IC) responsible for designing, delivering, and operating production-grade machine learning systems that materially improve product outcomes and business performance. This role combines deep applied ML expertise with strong software engineering, architecture, and operational excellence—ensuring models are not only accurate, but also reliable, observable, secure, cost-effective, and maintainable over time.

The Principal LLMOps Engineer designs, builds, and governs the production operating environment for Large Language Model (LLM) capabilities—covering deployment, routing, evaluation, monitoring, safety controls, and lifecycle management across internal and customer-facing applications. The role exists to turn experimental LLM prototypes into reliable, cost-effective, secure, and observable services that can be operated at enterprise scale.

The **Principal LLM Engineer** is a senior individual-contributor engineering leader responsible for designing, building, and scaling large language model (LLM) capabilities that are reliable in production, economically efficient, and aligned with safety, privacy, and product requirements. This role turns LLM research advances and vendor offerings into **repeatable platform capabilities** (e.g., RAG, evaluation, guardrails, routing, fine-tuning, observability) that product and engineering teams can safely and rapidly adopt.

The Principal Knowledge Graph Engineer designs, builds, and operationalizes enterprise-grade knowledge graph capabilities that connect data, concepts, and relationships to power AI-driven experiences such as search, recommendations, analytics, and agentic workflows. This role blends deep graph engineering, semantic modeling, and production software engineering to deliver a governed, performant, and evolvable “knowledge layer” across products and internal platforms.

The **Principal Generative AI Engineer** is a senior individual-contributor (IC) engineering leader responsible for designing, building, and operationalizing generative AI capabilities (LLM-powered features, agentic workflows, and internal AI platforms) that are secure, reliable, and cost-effective at enterprise scale. The role sits at the intersection of software engineering, applied ML, and platform engineering—translating business problems into production-ready architectures and guiding teams to deliver measurable outcomes.

The **Principal Federated Learning Engineer** is a senior individual contributor who designs, builds, and governs **privacy-preserving distributed machine learning** systems that enable model training across multiple data owners (devices, customers, business units, or partners) without centralizing sensitive data. The role exists to unlock high-value ML use cases where data cannot legally, contractually, or ethically be pooled—while still achieving strong model performance, reliability, and measurable business outcomes.

The **Principal Edge AI Engineer** is a senior individual contributor (IC) responsible for architecting, delivering, and operationalizing **machine learning inference and intelligent decisioning on edge devices** (e.g., gateways, industrial PCs, retail devices, mobile/embedded endpoints) where constraints such as latency, connectivity, privacy, power, and cost materially shape the solution. This role designs the end-to-end edge AI “production system”: model packaging and optimization, device runtime architecture, secure deployment and updates, observability, and continuous improvement loops.

The **Principal Computer Vision Engineer** is a senior individual contributor who defines and delivers computer vision (CV) capabilities that become reliable, scalable product features and/or internal platforms. This role owns end-to-end technical outcomes—from problem framing and data strategy through model development, optimization, deployment, monitoring, and iterative improvement—while setting engineering standards for CV across teams.

The Principal Autonomous Systems Engineer is a senior individual-contributor (IC) engineering role responsible for designing, validating, and scaling autonomy capabilities (perception, prediction, planning, control, and autonomy orchestration) that operate reliably in complex, real-world environments. This role blends advanced software engineering, applied ML, systems architecture, and safety-minded engineering to deliver end-to-end autonomous behaviors that meet product requirements and operational constraints.

The Principal Applied AI Engineer is a senior individual contributor who designs, builds, and scales production-grade AI systems that deliver measurable business outcomes. This role bridges advanced machine learning and software engineering: translating ambiguous product needs into reliable, secure, observable services and pipelines that can be operated at enterprise scale.

The **Principal AI Safety Engineer** is a senior individual contributor responsible for designing, implementing, and operationalizing technical safeguards that reduce safety, security, and misuse risks in AI/ML systems—especially large language model (LLM) and generative AI products. The role blends deep engineering expertise with applied risk thinking to ensure AI systems behave reliably under real-world conditions, including adversarial use.

The **Principal AI Platform Engineer** is a senior individual-contributor (IC) engineering leader responsible for designing, building, and evolving the internal platform capabilities that enable teams to develop, deploy, operate, and govern machine learning (ML) and generative AI solutions safely and efficiently at enterprise scale. This role unifies **platform engineering**, **MLOps**, **LLMOps**, **reliability engineering**, and **AI governance-by-design** into a coherent “paved road” that accelerates delivery while reducing operational and compliance risk.

The **Principal AI Evaluation Engineer** designs, implements, and governs the evaluation systems that determine whether AI models (including LLMs and traditional ML) are *safe, effective, reliable, and fit for production use*. This role establishes enterprise-grade evaluation methodology—offline benchmarks, online experimentation, human-in-the-loop scoring, and continuous monitoring—to reduce model risk and accelerate high-confidence releases.

The **Principal AI Engineer** is a senior, hands-on technical leader responsible for designing, building, and operating production-grade AI/ML (including GenAI where applicable) capabilities that materially improve product outcomes, internal productivity, and platform differentiation. This role bridges applied machine learning, software engineering, and reliable operations—ensuring models and AI services are safe, scalable, measurable, and maintainable.

The **Principal AI Agent Engineer** is a senior individual contributor who designs, builds, and operationalizes **agentic AI systems**—LLM-driven applications that can plan, use tools, execute multi-step workflows, and collaborate with humans and services safely and reliably. This role exists to turn rapidly evolving agent frameworks and foundation models into **production-grade capabilities** that create measurable business impact while meeting enterprise expectations for security, quality, and cost control.

The NLP Engineer designs, builds, evaluates, and operates natural language processing (NLP) capabilities that power product features and internal platforms, such as semantic search, summarization, classification, extraction, conversational experiences, and content safety. The role blends applied machine learning engineering with production-grade software engineering to deliver reliable, secure, and measurable language intelligence.

The **Multi-Agent Systems Engineer** designs, builds, and operates software systems where multiple AI agents (often LLM-powered) coordinate to accomplish complex workflows—planning, tool use, delegation, verification, and iterative improvement—within production-grade applications. The role blends applied machine learning, distributed systems thinking, and product engineering to turn agent research patterns into reliable, secure, cost-effective capabilities.

The **Model Validation Engineer** is an individual contributor engineering role responsible for independently assessing, testing, and challenging machine learning (ML) models before and after deployment to ensure they are accurate, robust, explainable, and safe for production use. This role designs and executes validation methodologies (offline evaluation, bias/fairness checks, stress testing, drift monitoring, and reproducibility verification) and translates findings into actionable engineering and product decisions.