Defines organizational async strategy for LLM systems: enterprise streaming inference standards, cross-team async LLM pipeline governance, async maturity model for AI-powered products. Makes strategic decisions on async infrastructure for LLM workloads.
Roles · LLM Engineer · Principal
What a Principal } should know
31 core skills, 80 in total. Expectations per skill, and what changes at the next level.
This page lists what a Principal } is expected to know and do, skill by skill. Core skills are the ones a manager and peers assess in a review cycle; the rest count only in self-assessment. Main areas: Programming Fundamentals, Backend Development, Database Management.
Core skills for a Principal
Grouped by area. The label on the right is the expected depth: Awareness, Working, Advanced or Expert.
Programming Fundamentals · 2
Defines organizational OOP strategy for LLM systems: enterprise prompt pipeline architecture standards, cross-team chain/agent design governance, model provider abstraction frameworks. Makes strategic decisions on LLM code architecture and tooling investments.
Backend Development · 5
Defines Elasticsearch/OpenSearch strategy at organizational level. Evaluates new technologies and approaches. Establishes enterprise standards and reference architectures.
Defines organizational strategy for LLM gateway and prompt orchestration platforms, evaluating FastAPI and emerging LLM-serving frameworks. Establishes enterprise standards for streaming inference APIs, token budget management, and reference architectures for multi-model routing services.
Defines Redis strategy at organizational level. Evaluates new technologies and approaches. Establishes enterprise standards and reference architectures.
Defines S3/Object Storage strategy at organizational level. Evaluates new technologies and approaches. Establishes enterprise standards and reference architectures.
Defines Task Queues strategy at organizational level. Evaluates new technologies and approaches. Establishes enterprise standards and reference architectures.
Database Management · 1
Defines organizational data strategy for LLM infrastructure: evaluates PostgreSQL pgvector vs dedicated vector databases for enterprise RAG platforms, designs multi-region data architectures for global LLM applications, establishes governance for conversation data and embedding storage at organizational scale.
API & Integration · 3
Defines organizational API strategy. Designs platform APIs. Establishes enterprise API governance and standards.
Defines organizational API strategy for LLM: enterprise LLM API platform standards, cross-team LLM service API governance, API infrastructure investment decisions for LLM workloads. Designs enterprise-grade API architecture for LLM platforms.
Defines organizational API strategy. Designs platform APIs. Establishes enterprise API governance and standards.
Cloud & Infrastructure · 2
Defines organizational cloud strategy for LLM serving infrastructure evaluating multi-cloud GPU options vs AWS Bedrock and custom deployments. Designs enterprise-grade LLM platforms with multi-region inference, model governance, and cost-optimized GPU fleet management. Establishes FinOps practices for GPU compute governance at organizational scale.
Defines organizational cloud strategy for LLM serving infrastructure spanning multi-GPU clusters and edge inference deployments. Evaluates multi-cloud architectures for GPU workload portability and model serving cost optimization. Designs enterprise-grade LLM serving platforms and establishes FinOps practices for GPU compute governance at organizational scale.
Testing & QA · 1
Defines organizational QA strategy for LLM systems: enterprise prompt evaluation standards, cross-team LLM output quality governance, quality engineering frameworks for AI-powered products. Implements platform-wide testing solutions for LLM pipeline reliability.
Data Engineering · 1
Defines organizational data strategy. Designs enterprise data platforms. Establishes data governance frameworks.
Machine Learning & AI · 12
Shapes the organization's agent infrastructure strategy, defining how agent frameworks integrate with the broader AI/ML platform. Drives research and innovation in agent architectures including self-evolving tool ecosystems, meta-learning agent strategies, and novel approaches to agent safety and alignment. Influences the LLM agent framework ecosystem through open-source contributions, research publications, and community leadership on production agent system design patterns.
Shapes organization-wide experiment tracking standards for AI/LLM initiatives: architects centralized systems capturing prompt evolution, model lineage, and evaluation benchmarks across all LLM products; drives integration of experiment tracking with compliance frameworks and cost optimization at scale
Defines the company-wide LLM engineering strategy spanning model selection, deployment topology, and cost governance. Architects next-generation LLM platforms supporting multi-model orchestration, continuous evaluation, and automated optimization. Drives industry partnerships and open-source contributions that advance the state of LLM infrastructure and tooling.
Shapes enterprise evaluation strategy. Defines approaches to continuous evaluation, model quality governance, and benchmark development. Ensures alignment between evaluation metrics and business objectives.
Shapes enterprise fine-tuning platform. Defines approaches to automated fine-tuning, model versioning, and A/B testing of fine-tuned models. Optimizes cost and speed of fine-tuning at scale.
Defines organizational MLflow strategy for LLM initiatives, unifying fine-tuning, RAG evaluation, and agent benchmarking across teams. Establishes registry standards for LLM assets: base models, adapters, and prompt libraries. Drives adoption for LLM governance, cost tracking, and compliance.
Defines organization-wide model monitoring strategy for LLM and generative AI systems. Establishes enterprise standards for evaluation benchmarks, safety monitoring, and cost governance. Drives unified monitoring platforms across teams with different LLM providers. Mentors leads on building robust LLMOps monitoring practices.
Defines organizational LLM serving strategy: inference infrastructure architecture, GPU/TPU procurement strategy, and cost governance for LLM operations. Evaluates build-vs-buy decisions for LLM infrastructure (self-hosted vs API providers). Drives adoption of efficient LLM serving practices and shapes technical vision for AI infrastructure at enterprise scale.
Shapes org-wide LLM training platform on PyTorch: multi-team GPU allocation, model parallelism standards, pre-training vs fine-tuning investment. Drives PyTorch 2.x compiler adoption for LLM workloads. Defines cross-team standards for model artifacts and cost optimization.
Defines RAG Architecture strategy at organizational level. Establishes enterprise approaches. Mentors leads and architects.
Shapes organizational LLM strategy: evaluates foundation model providers, defines enterprise AI governance policies, and architects cross-team LLM infrastructure. Establishes standards for model risk management, cost forecasting, and responsible AI deployment. Mentors leads on building scalable AI platforms.
Shapes enterprise vector database strategy. Defines approaches to centralized vector infrastructure, multi-tenant architecture, and cost optimization for billions of vectors at organizational scale.
AI-Assisted Development · 4
Shapes the organization's AI agent engineering vision, defining foundational architectures for autonomous and semi-autonomous agent systems. Drives research frontiers in agent development — emergent agent behaviors, self-evolving tool ecosystems, long-horizon planning with world models, and novel approaches to agent alignment and safety verification. Publishes research and influences the LLM agent engineering community through contributions to agent safety standards, evaluation benchmarks, and open-source agent infrastructure.
Shapes enterprise multi-provider LLM landscape strategy. Defines approaches to vendor lock-in mitigation, establishes frameworks for evaluating new models, and sets API usage policies.
Defines Model Context Protocol strategy at organizational level. Establishes enterprise approaches. Mentors leads and architects.
Shapes enterprise prompt engineering strategy. Defines organizational approaches to prompt management, automated optimization, and prompt quality. Mentors leads on advanced prompt design.
Additional skills
Not assessed by the team, but part of the self-assessment and the development plan.
} in the open competency matrix: 80 skills across 5 levels. The matrix is free for individuals and stays free.