Senior/Staff Software Engineer - C++

About SirenOpt SirenOpt helps manufacturers make better, safer, and more reliable micro- and nano-materials. These materials are the building blocks of critical sectors of the global economy such as batteries, computer chips, aircraft components, and power systems. But, surging material demand and growing complexity are pushing production to unprecedented scales and speeds, leaving manufacturers effectively flying blind. Small, undetected variations during production lead to wastage, lower performance, higher costs, and safety risks. SirenOpt is changing this by developing a manufacturing intelligence platform that non-destructively probes materials during production, revealing critical internal information without damaging them. Using a novel combination of cold atmospheric plasma, physics-informed machine learning, and predictive analytics, SirenOpt generates unique, real-time material fingerprints that capture material signals not accessible through conventional measurement techniques. These insights give manufacturers unprecedented visibility into how materials behave as they are made. We turn hidden data into actionable intelligence to help manufacturers reduce variability and thus increase yield and performance. The technology can be deployed as a standalone tool or integrated directly into factory production lines. SirenOpt is currently deploying early versions of its platform with some of the largest industrial manufacturers in the world across North America, Europe, and Asia. About the job Job Title: Senior/Staff Software Engineer - C++ Location: On-Site (San Leandro, CA) Job Type: Full-Time Role Overview SirenOpt is seeking a Senior / Staff Software Engineer to design and build the high-performance C++ and systems software that powers our manufacturing intelligence platform. In this role, you will help ensure the reliability, performance, and scalability of SirenOpt's software as it runs on real customer production lines, while contributing to the architecture and technical foundations needed for a growing commercial product. Working closely with firmware, hardware, and application engineering teams across every phase of product development, you will design and optimize multi-threaded, asynchronous software on Linux, analyze and improve performance across CPU, memory, storage, networking, and I/O, and debug complex issues that span software and hardware boundaries. You will also read, maintain, and extend existing Python tooling used for automation, testing, and data analysis, and take ownership of software components throughout the full product development lifecycle. This position is well suited for a self-driven engineer who takes ownership of their work, writes clean and maintainable modern C++ (C++17/20), and enjoys understanding how software interacts with operating systems and hardware to achieve exceptional performance. You will contribute at a high level in a collaborative, fast-moving engineering environment, participating in architecture, technical design, and code reviews as you help ship robust software for commercial products. What You'll Do Design, develop, and optimize high-performance software using modern C++ (C++17/20)Develop scalable, reliable, and maintainable software for Linux-based systemsDesign multi-threaded and asynchronous software architecturesAnalyze, profile, and optimize software performance across CPU, memory, storage, networking, and I/ORead, understand, maintain, and enhance existing Python code used for automation, testing, and data analysisCollaborate closely with firmware, hardware, and application engineering teamsParticipate in software architecture, technical design, and code reviewsDebug complex system-level issues across software and hardware boundariesTake ownership of software components throughout the product development lifecycle What We're Looking For The ideal candidate is passionate about building high-quality commercial software and solving challenging systems problems. You take ownership of your work, write clean and maintainable code, and enjoy understanding how software interacts with operating systems and hardware to achieve exceptional performance. Experience building and shipping software for commercial products is highly valued. You thrive in a collaborative environment and enjoy working across software, firmware, and hardware disciplines to build products used in real customer environments. Required Qualifications Bachelor's or Master's degree in Computer Science, Computer Engineering, Electrical Engineering, or a related technical field5+ years of professional software development experience (Senior) or 8+ years (Staff)Strong proficiency in modern C++ (C++17/20)Working knowledge of Python with the ability to read, understand, maintain, and modify existing Python codeStrong experience developing software on LinuxStrong understanding of: Operating systems, Memory management, Multi-threading and concurrency, Software architecture, Performance optimizationExcellent debugging and problem-solving skillsExperience using Git and modern software development workflows Nice to have: Experience designing and developing large-scale commercial software systemsExperience developing and shipping software for commercial productsExperience with scientific instrumentation or data acquisition systemsExperience collaborating with firmware and hardware engineering teamsFamiliarity with low-latency, real-time, or data acquisition software systemsExperience developing desktop applications using Qt Widgets and Qt ChartsFamiliarity with scientific computing, signal processing, physics, or machine learningExperience with Linux systems programmingExperience with performance profiling tools such as perf or ValgrindExperience with CMake and GDBFamiliarity with Embedded LinuxExperience with hardware communication interfaces such as Ethernet, USB, PCIe, or SerialFamiliarity with CI/CD and automated testing Base Pay Range: $160,000 USD - $240,000 USD Benefits Equity and Salary compensation depends on experience Health, Dental, Vision plans provided401k matching providedTime off: 20 days of PTO per year, plus approximately 15 paid US holidays per year