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 systems
Design multi-threaded and asynchronous software architectures
Analyze, profile, and optimize software performance across CPU, memory, storage, networking, and I/O
Read, understand, maintain, and enhance existing Python code used for automation, testing, and data analysis
Collaborate closely with firmware, hardware, and application engineering teams
Participate in software architecture, technical design, and code reviews
Debug complex system-level issues across software and hardware boundaries
Take 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 field
5+ 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 code
Strong experience developing software on Linux
Strong understanding of: Operating systems, Memory management, Multi-threading and concurrency, Software architecture, Performance optimization
Excellent debugging and problem-solving skills
Experience using Git and modern software development workflows
Nice to have:
Experience designing and developing large-scale commercial software systems
Experience developing and shipping software for commercial products
Experience with scientific instrumentation or data acquisition systems
Experience collaborating with firmware and hardware engineering teams
Familiarity with low-latency, real-time, or data acquisition software systems
Experience developing desktop applications using Qt Widgets and Qt Charts
Familiarity with scientific computing, signal processing, physics, or machine learning
Experience with Linux systems programming
Experience with performance profiling tools such as perf or Valgrind
Experience with CMake and GDB
Familiarity with Embedded Linux
Experience with hardware communication interfaces such as Ethernet, USB, PCIe, or Serial
Familiarity with CI/CD and automated testing
Base Pay Range
$160,000—$240,000 USD
Benefits
Equity and Salary compensation depends on experience
Health, Dental, Vision plans provided
401k matching provided
Time off: 20 days of PTO per year, plus approximately 15 paid US holidays per year