Roles · IoT Engineer · Principal

What a Principal } should know

40 core skills, 55 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, API & Integration, Cloud & Infrastructure.

40core skills
15additional skills
10skill areas
100%at Advanced or Expert
Assess myself as Principal Full role matrix

Core skills for a Principal

Grouped by area. The label on the right is the expected depth: Awareness, Working, Advanced or Expert.

Programming Fundamentals · 6

Defines enterprise algorithmic optimization strategy for IoT. Researches TinyML and edge AI algorithm applications for next-generation IoT devices.

Defines enterprise async architecture for IoT platform. Evaluates distributed event processing approaches for large-scale IoT installations.

Defines enterprise code quality strategy for IoT firmware. Builds codebase maturity metrics. Evaluates tools (Polyspace, Klocwork) for safety-critical IoT.

Defines enterprise approach to data structures in IoT. Researches novel structures for time-series IoT data and edge analytics with minimal memory footprint.

Defines enterprise memory management strategy for IoT. Evaluates hardware memory protection (MPU) and Rust borrow checker for memory safety.

Defines enterprise concurrency strategy for IoT firmware. Evaluates multicore MCU and AMP/SMP approaches for high-performance IoT.

API & Integration · 3

Defines enterprise API strategy for IoT. Builds public API program and partner integration framework for IoT ecosystem.

Defines enterprise event-driven integration strategy for IoT. Builds AsyncAPI specification and event mesh architecture.

Defines enterprise real-time communication strategy for IoT. Evaluates WebSocket vs SSE vs gRPC streaming for various IoT use cases.

Cloud & Infrastructure · 4

AWS Expert

Defines enterprise cloud IoT strategy on AWS. Evaluates multi-cloud vs all-in AWS. Establishes IoT Landing Zone and governance for large-scale IoT programs.

Docker Expert

Defines enterprise container strategy for IoT. Evaluates lightweight container runtimes (containerd, Podman) for edge. Establishes container security policy.

Defines enterprise IoT network strategy. Evaluates SD-WAN, SASE for IoT. Builds network architecture for multi-site IoT installations.

Terraform Expert

Defines enterprise IaC strategy for IoT. Evaluates Terraform vs Pulumi vs CloudFormation for IoT use cases. Builds platform IaC for large-scale IoT.

Testing & QA · 2

Defines organizational QA strategy. Builds quality engineering culture. Implements platform testing solutions.

Unit Testing Expert

Defines organizational QA strategy. Builds quality engineering culture. Implements platform testing solutions.

Security · 2

Defines enterprise IoT security strategy based on OWASP and IEC 62443. Builds security maturity model for IoT organization.

Defines enterprise security strategy. Builds security architecture. Coordinates compliance. Represents the organization in the security community.

AI-Assisted Development · 2

Defines ChatGPT / Claude strategy at organizational level. Establishes enterprise approaches. Mentors leads and architects.

Defines GitHub Copilot strategy at organizational level. Establishes enterprise approaches. Mentors leads and architects.

Observability & Monitoring · 3

OpenTelemetry Expert

Defines organizational observability strategy. Implements platform solutions. Builds reliability culture. Defines enterprise SLO framework.

Defines organizational observability strategy. Implements platform solutions. Builds reliability culture. Defines enterprise SLO framework.

Defines organizational observability strategy. Implements platform solutions. Builds reliability culture. Defines enterprise SLO framework.

Version Control & Collaboration · 2

Code Review Expert

Defines organizational code review strategy for IoT: enterprise embedded code review standards, cross-team firmware review governance, review culture maturity model for IoT development. Mentors leads on IoT code review best practices across hardware and cloud layers.

Git Advanced Expert

Defines Git Advanced strategy at organizational level. Establishes enterprise approaches. Mentors leads and architects.

Networking & Telecom · 3

DNS Deep Dive Expert

Defines enterprise DNS strategy for IoT. Evaluates DNS-based service discovery (Consul) and cloud-native DNS for IoT platform services.

Defines enterprise HTTP strategy for IoT. Evaluates QUIC adoption for IoT in the context of enterprise networks and proxy infrastructure.

Defines enterprise IoT networking strategy. Evaluates 5G NB-IoT, LPWAN, TSN for industrial IoT. Builds network architecture for global IoT deployments.

Embedded & IoT · 13

Defines enterprise wireless connectivity strategy for IoT. Evaluates new standards (Matter, Wi-Fi HaLow, UWB) for future products. Influences industry standards.

Defines embedded C development strategy at organizational level. Builds platform SDK for IoT product family. Evaluates new MCU architectures (RISC-V) for product roadmap.

Defines C++ embedded strategy at company level. Evaluates Rust vs C++ for new IoT projects. Builds platform architecture for IoT product family.

Defines enterprise edge computing strategy for IoT. Evaluates KubeEdge, OpenYurt for edge cluster orchestration. Builds edge AI roadmap for industrial IoT.

Defines enterprise strategy for IoT firmware CI/CD. Establishes approaches to firmware supply chain security and regulatory compliance in CI/CD.

Defines enterprise diagnostics strategy for IoT products. Establishes approaches to field debugging and remote diagnostics for devices in production.

Defines enterprise analog signal processing strategy in IoT. Evaluates transition to sigma-delta ADC and high-precision sensors for industrial IoT.

Defines enterprise IoT cloud strategy. Evaluates vendor lock-in vs managed services. Builds architecture for industrial-scale IoT with millions of devices.

IoT Security Expert

Defines enterprise IoT security strategy. Establishes approaches to supply chain security for IoT. Engages with regulators and standards organizations.

Defines enterprise rapid prototyping strategy for IoT with MicroPython. Evaluates CircuitPython, Toit, and alternative runtimes. Contributes to upstream MicroPython project.

MQTT Protocol Expert

Defines enterprise IoT messaging strategy. Evaluates Sparkplug B, Unified Namespace approaches. Builds architecture for millions of devices.

Defines enterprise RTOS strategy for organizational IoT products. Evaluates certifiable RTOS (SafeRTOS) for safety-critical IoT. Builds real-time platform roadmap.

Defines enterprise hardware interfaces strategy for IoT. Evaluates new protocols (I3C, SPI Quad) for next generation. Builds platform driver architecture.

Additional skills

Not assessed by the team, but part of the self-assessment and the development plan.

Apache KafkaAPI DocumentationCursor IDEDatabase IndexingDesign PatternsGitHub Actions / GitLab CIGraphQL DesignKubernetes CoreOOP & SOLID PrinciplesPostgreSQLPrompt Engineering for CodeRedisSLI / SLO / SLASystem Design FundamentalsType Safety & Type Systems
Run this with your whole team
Self-assessment plus manager and peer reviews against the same matrix, gap analysis and next-level readiness for every engineer. Team Pro is free for 14 days; individual tools stay free forever.
Start a team trial (14 days free) Send to my manager

} in the open competency matrix: 55 skills across 5 levels. The matrix is free for individuals and stays free.