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Blitzy is an AI software development platform transforming enterprise software development through autonomous code generation. The company, founded by experienced entrepreneurs and backed by tier-1 investors, has built an agentic platform capable of autonomously executing 80% of software development work, serving Fortune 500 customers.
You will join as a Principal Engineer—the most senior individual contributor role at the company. This is a 100% hands-on position focused on owning Blitzy's most critical production systems and delivering high-leverage features that improve customer outcomes and engineering velocity. You will spend your time writing, reviewing, and shipping production code, not managing people or processes. Leverage comes from system ownership, execution quality, and durable technical decisions.
Key responsibilities include:
- Own mission-critical production systems end-to-end, ensuring correctness, scalability, performance, reliability, and operational excellence
- Design, build, and ship high-impact backend systems and features using Python, REST, gRPC, Kubernetes, and Terraform
- Architect scalable services and cloud infrastructure supporting complex enterprise applications
- Identify and resolve complex technical bottlenecks limiting engineering quality, system performance, or organizational velocity
- Build and operate LLM-powered systems and validation loops that evaluate correctness, consistency, durability, and production performance
- Design and evolve data architectures incorporating relational, NoSQL, graph, and vector databases for 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 sound technical judgment
The company culture emphasizes moving fast, championship-level collaboration, passion for invention, and deep customer focus. You'll work in-person with a team of high performers operating like a professional sports team.
REQUIREMENTS:
- Direct experience with Python as a primary programming language, backend frameworks, and microservices architectures
- Expertise in REST and gRPC; proficiency in Node.js and JavaScript
- Proficiency in GCP, plus experience with at least one additional cloud platform (AWS or Azure)
- Advanced knowledge of Kubernetes and Terraform in production environments
- Experience operating highly available production systems, including monitoring, scalability, reliability, performance optimization, and operational tooling
- Strong knowledge of SQL and NoSQL databases (PostgreSQL, MySQL, MongoDB, Cassandra, DynamoDB)
- Familiarity with graph databases (Neo4j) and vector databases or embedding infrastructure for semantic search
- Hands-on experience building and operating LLM-powered systems in production, including evaluation, validation, regression testing, tracing, and failure analysis
- Working knowledge of LLM observability and evaluation tools (LangSmith or comparable); familiarity with OpenAI, Anthropic, or similar model providers is a plus
- Ability to contribute across the full stack with strong understanding of frontend architecture and ability to debug, design, and ship across frontend, backend, infrastructure, and AI systems
- Understanding of large-scale enterprise software systems, including architecture, integration, deployment, modernization, and long-term maintainability
- Proven track record operating at Staff+, Principal Engineer, or equivalent level, independently driving complex technical initiatives and delivering high-impact outcomes with minimal supervision
