Software Principal Engineer Jobs

Principal Software Development Engineer needed to architect and lead Flowise, an extensible AI platform across open source, SaaS, and enterprise. This hands-on role demands 8+ years building large-scale systems, deep expertise in JavaScript/TypeScript, Node.js, React, and distributed systems. You...

Principal C# Software Engineer sought to design high-performance desktop GUIs for real-time trading in Sydney. Leverage 7+ years’ C#/.NET expertise, WPF, and MVVM to build intuitive, scalable Windows applications. Collaborate with traders and researchers, owning features end-to-end. Benefits incl...

Principal Embedded Software Engineer sought to lead embedded systems architecture and technical delivery in Bradford, UK. This senior, hands-on role demands advanced C/C++, RTOS, and multithreading expertise, plus electrical power systems knowledge. You will own the full software lifecycle, from ...

Principal Embedded Software Engineer sought to lead architecture, technical delivery, and strategy for advanced embedded systems in Manchester. This senior, hands-on role demands expertise in C/C++, RTOS, real-time systems, and electrical power systems knowledge. You will own end-to-end product d...

Principal Software Engineer (AI/Agentic Developer Productivity) – Redmond, WA. Build the agentic engineering platform powering all of Microsoft. Requires 6+ years coding in C++, Python, or Java, plus expertise in Agent SDKs, LLMs, LangChain, and RAG. Drive AI-first development, mentor engineers, ...

Lead a high-impact engineering squad at Microsoft Security, shaping the technical strategy for the Knowledge Plane team. You will drive petabyte-scale, secure systems for Microsoft Sentinel’s data lake, leveraging expertise in C++, C#, or Python. Based in Redmond, this role offers the chance to s...

Principal Software Engineer role on Microsoft’s Experimentation Platform (ExP) in Beijing. You will build large-scale distributed systems, data pipelines, and AI-driven automation powering experiments for Copilot, Bing, and Azure. Requires 6+ years in C#, Java, or Python with strong distributed s...

Principal Software Engineer role at Microsoft CO+I in Redmond, WA. Design next-gen AI-driven platforms for global datacenter infrastructure, focusing on telemetry intelligence, anomaly detection, and autonomous operations. Requires 6+ years coding in C++, Python, or Java with a Bachelor's in CS. ...

Senior Principal Software Engineer sought by BAE Systems in Hudson, NH to develop next-gen electronic systems for national security. Requires 8+ years experience with C/C++, Python, and real-time embedded Linux, plus container technologies (Kubernetes, Docker). Ideal candidate has DSP/SDR experie...

Principal Embedded Software Engineer sought to lead architecture, technical delivery, and strategy for advanced embedded systems in the UK. This senior, hands-on role demands expertise in C/C++, RTOS (FreeRTOS), and electrical power systems theory. You will own end-to-end product delivery, drive ...

Principal Software Engineer needed to lead next-gen mobile experiences for frontline workers at Microsoft in Redmond. Drive architecture for offline-capable apps integrating with Dynamics 365 and Dataverse. Requires 8+ years experience, expertise in React, TypeScript, Kotlin, Swift, and AI-assist...

Join Microsoft’s Hardware Security team in Redmond as a Principal Software Engineer. You will design low-level, code-to-metal security firmware for Azure, Windows, and Xbox, defending billions of devices. Requires a BS in CS, 6+ years in C/C++/Rust/Python, and expertise in secure systems. Lead in...

Principal Software Engineer – Azure Data (PostgreSQL AI). Design and lead core AI capabilities in PostgreSQL, including vector indexing and semantic query operators. Requires a Bachelor’s in CS and 6+ years of systems engineering experience with C, C++, or Python. Join Microsoft to build the data...