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About the Role   Bluestaq is seeking a Principal Software Engineer to serve as an org-level technical leader responsible for setting technical direction across significant portions of Bluestaq's software ecosystem. You'll define reference architectures, tackle the company's most complex engineering challenges, and drive transformational changes that shape how Bluestaq builds and operates software in support of national security and defense missions.   Why This Role Matters   Principal Software Engineers define 'how we build' at Bluestaq for entire classes of systems. Your architectural decisions, reference implementations, and technical strategies become the patterns that dozens of engineers follow across multiple products and programs. You translate mission requirements and business strategy into durable technical direction, and you ensure that the most complex, high-stakes technical problems receive the depth of thinking they deserve. The work you do at this level has a shelf life measured in years, not sprints.   Key Responsibilities   Own technical strategy for large segments of the Bluestaq product and platform or for major mission-critical system areas   Define reference architectures and engineering patterns that multiple teams adopt (standardized microservice patterns, shared UI frameworks, cross-cutting data contracts, API standards)   Tackle the company's most complex technical problems: tricky scalability challenges, deep interoperability issues between systems, and highly complex distributed workflows   Evaluate and guide adoption of major technologies, frameworks, and architectural approaches with long-term implications for the platform   Ensure technical decisions support reliability, security, and performance at scale across the full product portfolio   Partner closely with senior engineering leadership, product management, and program management to shape roadmaps and align technical investment with mission priorities   Operate with strategic autonomy within your domain: set technical direction rather than executing it, while remaining grounded in delivery realities   Delegate implementation details to Staff and Senior Staff engineers while staying sufficiently engaged to keep designs sound and on track   Take ownership of the long-term health and evolution of key architectural components and platform foundations   Mentor Staff and Senior Staff engineers into broader-scope technical leaders capable of owning major domains independently   Translate mission and business requirements into technical strategies, architecture principles, and engineering investment priorities   Lead trade studies and technical decisions on new technologies, frameworks, and architectural strategies with cross-team impact   Required Qualifications   Master-level technical expertise in one or more major software engineering domains (e.g., distributed systems, data-intensive applications, real-time systems, complex UI architectures) with strong breadth across adjacent areas   Demonstrated ability to define technical strategy and reference architectures that are successfully adopted across multiple engineering teams over multiple years   Extensive experience leading the technical direction of large, complex software systems from initial concept through multi-year operation and evolution   Strong background in evaluating and adopting new technologies, frameworks, and architectural approaches at organizational scale—including build vs. buy and platform investment decisions   Proven ability to translate business and mission requirements into durable technical decisions, engineering principles, and ar