Principal Platform Engineer

We’re partnering with a fast-growing technology company building connected-worker and operational software for large-scale construction and industrial environments. Their platform brings together data from connected devices, workers and sites to power real-time safety, compliance and productivity applications.They’re looking for a Principal Platform Engineer to take senior technical ownership across the platform - shaping architecture, solving complex distributed-systems problems and setting engineering standards while remaining deeply hands-on.What You’ll Do:Own the technical architecture across backend services, data pipelines, APIs, SDKs, streaming and platform infrastructure.Design and build scalable, multi-tenant platform capabilities that connect workers, devices, sites, events and customer workflows.Define governed data pipelines with clear contracts, lineage, quality controls and reliable replay.Build secure and scalable APIs and SDKs for internal teams, partners, customers and AI applications.Make pragmatic technology and data-store decisions across relational, time-series, streaming, search and vector workloads.Drive the evolution of the backend platform, working primarily with C#/.NET while contributing across other languages where appropriate.Shape the technical direction of AI-native capabilities, including AI agents, retrieval, tool use, MCP and model evaluation.Improve engineering standards across testing, CI/CD, observability, release processes and production operations.Who We’re Looking For:10+ years of software engineering experience, with sustained impact at Staff, Principal, Lead Architect or equivalent level.Proven experience designing and delivering scalable SaaS platforms or complex distributed systems in production.Strong backend and distributed-systems expertise, with deep hands-on experience in at least one of C#/.NET, Go, Python, Java or Node.js.Strong API design experience across REST and/or GraphQL, with knowledge of authentication and identity patterns such as OAuth, JWT and SSO.Experience with GCP and/or AWS, Kubernetes, Terraform, containers, CI/CD and observability.Experience working with governed data platforms, ontologies, data lineage or similar systems.Hands-on experience with modern AI integration patterns such as LLM prompting, RAG, tool/function calling, MCP or agent architectures.Exceptional written and spoken English.Interested?Apply today!