Needl

Principal Software EngineerWe're working with a mission-driven SaaS company building a real-time, AI-powered platform that replaces legacy email workflows used by public safety agencies in the US who are looking for a Principal Python Engineer. The Role- Take technical ownership of backend systems and help shape engineering culture across the organization.- This is a hands-on role with organizational scope, suitable for someone who wants to build and scale real-world systems while investing in the people around them.- Set architectural direction, mentor engineers at all levels, and collaborate with cross-functional leadership to move fast without breaking things. Responsibilities- Architect &amp; Build: Own the end-to-end design and development of scalable, production-grade backend services and APIs.- Set the Standard: Define and enforce engineering best practices, coding standards, and architectural patterns.- Lead &amp; Mentor: Conduct code reviews, provide technical guidance, and foster a culture of craft and continuous improvement.- Own the Platform: Evolve infrastructure for reliability, performance, scalability, observability, fault tolerance, and security.- Collaborate Cross-Functionally: Partner with product, design, and executive leadership to translate business objectives into technical strategy.- Deploy &amp; Operate (Bonus): Experience with CI/CD pipelines and cloud infrastructure is a plus, but not a core requirement. Qualifications- 10+ years of backend development experience, including senior, staff, or principal-level roles.- Deep expertise in backend systems design and distributed systems with a track record of owning complex production infrastructure.- Architect &amp; Build: Lead development of scalable backend services using Python, FastAPI, PostgreSQL, and OpenSearch.- Proven experience designing and building backend APIs for SaaS products, including multi-tenancy, authentication, versioning, and developer experience.- Strong proficiency in SQL and experience designing for security, fault tolerance, and observability.- Experience setting technical direction at an organizational level, not just within a single team.- Strong communication skills and the ability to make technical trade-offs legible to non-technical stakeholders.- Prior startup or mission-critical environment experience strongly preferred.- Bonus: Hands-on experience with CI/CD pipelines and cloud infrastructure (e.g., AWS) at scale. Why join- If you’re looking to lead meaningful technical work on a platform used by real-world operators, we’d love to talk. 🚀

Backend Development

Software Development & Engineering

Software Architecture

Cloud Architecture

Infrastructure & Cloud Services

English

Are you a US Citizen or Green Card holder?

Do you have 6+ years with python as your primary language?

Python

FastAPI

PostgreSQL

GraphQL API Development

SQL Server

IBM Cloud

CircleCI

Principal Python Engineer

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