---
title: 'Senior/Staff Software Engineer - C++ at SirenOpt'
canonical: 'https://feeny.ai/job/senior-staff-software-engineer-c-sirenopt-san-leandro-crz4qk56qpbe'
type: 'job'
last_seen: '2026-10-18'
---

# Senior/Staff Software Engineer - C++ at SirenOpt

- **Company:** SirenOpt
- **Location:** San Leandro, CA
- **Compensation:** $160k–$240k
- **Posted:** 2026-10-01
- **Last confirmed live:** 2026-10-18
- **Apply:** https://job-boards.greenhouse.io/sirenopt/jobs/4430497009

## Job description

## 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

## About SirenOpt

## Company Overview
- **One-liner**: SirenOpt provides a non-destructive, real-time materials characterization platform that uses cold atmospheric plasma and AI to create detailed material fingerprints for manufacturing quality control.
- **Entity Type**: Private (Venture stage; total funding $21.5M)
- **Headquarters**: San Leandro, California, United States
- **Founded**: 2022
- **Founders**: Jared O’Leary (CEO), Ali Mesbah (CTO, UC Berkeley), Joel Paulson (co-founder, UW–Madison)

## Core Business
- **Primary Industry**: Manufacturing intelligence / advanced materials characterization (battery, semiconductor, aerospace, medical devices, packaging, electronics)
- **Target Customers**: B2B, Enterprise manufacturers with high-throughput production lines (roll-to-roll, piece-to-piece)
- **Mission**: “Create a paradigm shift in advanced materials characterization by leveraging cold atmospheric plasma, machine learning and predictive analytics to non-destructively create a uniquely distinctive, multifaceted material fingerprint in real-time.” [sirenopt.com](https://www.sirenopt.com/about)

## Products & Services
- **PlasmaSens™** – A modular, scalable platform for inline and offline material analysis. Uses cold atmospheric plasma to measure multiple material properties (e.g., cathodes, anodes, separators, coatings) non-destructively and in real time. Available as a benchtop standalone system, piece-to-piece (robot-arm mounted) for inline inspection, and roll-to-roll (up to 1.5m width) for continuous high-throughput monitoring. Delivers pass/fail feedback and enables predictive quality control. [sirenopt.com](https://www.sirenopt.com/)

## Market Standing
- **Valuation/Market Cap**: Not disclosed
- **Key Metric**: Total funding **$21.5M** across five rounds (Pre-Seed $3.0M led by SkyDeck Berkeley, Seed $6.6M led by Visionaries Tomorrow and Voyager Ventures, Venture $6.5M led by Hitachi Ventures and InMotion Ventures, Grant $2.4M from California Energy Commission) [linkedin.com](https://www.linkedin.com/company/sirenopt) [cbinsights.com](https://www.cbinsights.com/company/sirenopt)
- **Notable Investors/Partners**: Voyager Ventures, Visionaries Tomorrow, Hitachi Ventures, InMotion Ventures, SkyDeck Berkeley, California Energy Commission (BRIDGE Grant), Lawrence Berkeley National Lab Cyclotron Road, Activate
- **Growth Signals**: 41 employees (59% technical), deploying with largest industrial manufacturers across North America, Europe, and Asia; first commercial product scheduled for 2026; announced deployment at ECF in Autumn 2026 [sirenopt.com](https://www.sirenopt.com/) [linkedin.com](https://www.linkedin.com/company/sirenopt)

## Competitive Advantages
- **Unique technology**: The only non-destructive measurement method using cold atmospheric plasma to generate a rich, multi-property material fingerprint in real time, without chemicals or sample preparation.
- **Speed**: From hours to seconds – quality decisions made at production speed, catching defects before they propagate.
- **Physics-informed AI**: Combines plasma signals with machine learning to detect hidden defects and predict failure modes, providing insights conventional testing cannot.
- **Flexibility**: Modular platform (benchtop, inline, roll-to-roll) adaptable to diverse substrate sizes and production environments.

## Strategic Focus
- **Commercialization**: Accelerating deployment of PlasmaSens into factory production lines, with a first commercial release in 2026 and an inline deployment at ECF that autumn.
- **Market expansion**: Targeting battery, semiconductor, aerospace, medical device, and packaging manufacturers globally.
- **Sustainability**: Enabling smarter manufacturing to reduce waste, improve yield, and accelerate development of advanced materials. [sirenopt.com](https://www.sirenopt.com/about)

## Why Work Here
- **Impact**: Join a deep-tech startup at the forefront of manufacturing intelligence, working on a “new to the world” metrology tool that transforms how materials are measured and controlled.
- **Engineering culture**: 59% of the team holds technical roles (specialist/senior level); the company values hands-on work in hardware, firmware, software, and AI.
- **Benefits**: Incentive stock options, comprehensive health coverage (medical, dental, vision), 20 days PTO, 15 paid company holidays, and 401(k) matching for qualified employees. [sirenopt.com](https://www.sirenopt.com/careers)
- **Location**: Based in San Leandro, CA (Bay Area). Office presence expected; remote/hybrid policy not explicitly stated.
- **Growth trajectory**: Early-stage (41 employees, $21.5M funding) with active hiring (5 open roles including Lead Software Engineer, Staff EE, Quality Manager) and strong backing from top-tier investors.

## Sources
1. [sirenopt.com](https://www.sirenopt.com/) – Product details, company overview
2. [sirenopt.com/about](https://www.sirenopt.com/about) – Mission, leadership, investors
3. [sirenopt.com/careers](https://www.sirenopt.com/careers) – Benefits, job openings
4. [linkedin.com/company/sirenopt](https://www.linkedin.com/company/sirenopt) – Employee count, funding rounds, department breakdown
5. [cbinsights.com/company/sirenopt](https://www.cbinsights.com/company/sirenopt) – Funding details, product differentiators

## Other roles at SirenOpt

- [Staff Embedded Linux Software Engineer](https://feeny.ai/job/staff-embedded-linux-software-engineer-sirenopt-san-leandro-1tppdmzfax32) — San Leandro, CA
- [Software Engineer (Early Career) – C++ & Systems](https://feeny.ai/job/software-engineer-early-career-c-systems-sirenopt-san-leandro-9f5sr9deekkq) — San Leandro, CA
- [Senior Technical Sales Engineer](https://feeny.ai/job/senior-technical-sales-engineer-sirenopt-san-leandro-s8972z8mbap1) — San Leandro, CA
- [Staff/Senior Mechanical Engineer](https://feeny.ai/job/staff-senior-mechanical-engineer-sirenopt-san-leandro-bd3kk0f6rywc) — San Leandro, CA
- [Senior/Staff Scientist - Algorithms & Data Products](https://feeny.ai/job/senior-staff-scientist-algorithms-data-products-sirenopt-san-leandro-gvvg84y0z46z) — San Leandro, CA
- [Metrology Data Scientist](https://feeny.ai/job/metrology-data-scientist-sirenopt-san-leandro-1gc1vjkphztb) — San Leandro, CA
- [Staff Quality Engineer](https://feeny.ai/job/staff-quality-engineer-sirenopt-san-leandro-m9sd523ecqth) — San Leandro, CA
- [Sr. Account Manager](https://feeny.ai/job/sr-account-manager-sirenopt-san-leandro-9qbnr3f1knwz) — San Leandro, CA
- [Senior Product Manager](https://feeny.ai/job/senior-product-manager-sirenopt-san-leandro-pn0r0t6ax8xj) — San Leandro, CA
- [Metrology Applications Engineer](https://feeny.ai/job/metrology-applications-engineer-sirenopt-san-leandro-rq9dwz4cdbdp) — San Leandro, CA