Principal Software Engineer
Blitzy · Cambridge, MA
About this role
## Principal Software Engineer ### About Blitzy Blitzy is a Cambridge, MA–based AI software development platform on a mission to revolutionize the software development life cycle by autonomously building custom software. The platform turns enterprise requirements into enterprise-grade code and can autonomously execute a large portion of software development work. ### Culture - **Move Blitzy Fast:** Time is precious—innovate quickly and deliver exceptional software. - **Championship Mindset:** Operate like a professional sports team—high standards, collaboration in-person, and focus on the mission. - **Passion for Invention:** Constant innovation and iteration. - **Work for the Customer:** Deliver outsized value and build deep, meaningful partnerships. ### About the Role We’re hiring a **Principal Engineer** to take full, hands-on ownership of Blitzy’s most critical production-grade systems and deliver high-leverage features that improve customer outcomes and engineering velocity. This is the **most senior individual contributor** role at the company today. It is **100% hands-on**—not an architecture-only role, not a promotion-track role, and not people management. ### Responsibilities - **Own mission-critical production systems end-to-end** (correctness, scalability, performance, reliability, operational excellence). - **Design, build, and ship** high-impact backend systems and features. - **Architect scalable services and cloud infrastructure** using technologies such as **Python, REST, gRPC, Kubernetes, and Terraform**. - **Identify and resolve complex technical bottlenecks** affecting quality, performance, or velocity. - **Build and operate LLM-powered systems** and validation loops for correctness, consistency, durability, and production performance. - **Design and evolve data architectures** using relational, NoSQL, graph, and vector databases for enterprise applications and semantic retrieval. - **Modernize complex enterprise systems** while balancing reliability, maintainability, scalability, and delivery speed. - **Set and uphold engineering quality standards** through hands-on technical leadership and long-term technical judgment. ### Qualifications - Direct experience… *(additional qualification details were not included in the provided description)*
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