Principal Software Engineer (Substrate Store)

Lead architecture, design, and implementation for Store Access modernization — latency-critical access APIs, search on Azure, and integration with the broader Substrate storage fabric and M365 dependencies. Drive API optimization at scale — define high-throughput, low-latency access contracts, concurrency and resource-governance models, caching, and back-pressure, balancing latency, cost, and reliability. Own the search-on-Azure technical direction — lead the design and scaling of search/indexing systems on Azure infrastructure, including index freshness, query performance, and cost efficiency. Own and broker cross-team architecture decisions across upstream and downstream dependencies, ensuring designs meet performance, scalability, resiliency, disaster-recovery, cost, security, privacy, compliance, and accessibility expectations. Lead by example in engineering craft — produce extensible, maintainable, well-tested, secure, performant code in C# and Rust, and review code and test code for diagnosability, reliability, maintainability, security risks, compliance, and appropriate coverage. Define the optics — quality metrics, telemetry, dashboards, and feedback loops that guide technical decisions, measure customer value, surface risks early (especially latency and security regressions), and improve service health. Apply AI-native development practices responsibly, including appropriate controls over AI-generated requirements, designs, code, tests, and operational assets; evaluate AI tools and practices that improve engineering productivity and quality. Bachelor's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python Master's Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelor's Degree in Computer Science or related technical field AND 12+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience. 2+ years acting as a Principal Engineer (or equivalent), with clear ownership of architecture, design decisions, and technical direction across multiple workstreams and teams. Committed-level proficiency in C# and/or Rust, with a proficient command of system performance, memory management, and multithreading. Deep knowledge in API design and optimization for high-throughput, low-latency services — concurrency control, resource governance, caching, and protocol/contract design. Committted understanding and knowledge in reliability, observability, safe deployment, and operational excellence, including oncall experience for systems serving millions of users. Proven ability to mentor engineers and influence technical direction without direct authority.