SirenOpt
Electrical & Electronic Engineering · Advanced Materials
$29.1Mtotal raised · 3 rounds on record
7open roles
$190kmedian advertised pay
$19.4Mlatest round · Venture round · Sep 2026 · 2 mo ago
Overview
SirenOpt platforms provide non-destructive, real-time, inline and off-line materials characterization and classification solutions for manufacturers.
Funding and backers
Total raised
$29.1M
3 rounds on record
Latest round
$19.4M
Venture round · Sep 2026 · 2 mo ago
Team
30
US Form 5500 (plan participants) · Dec 2025 · +114% in a year
Hiring now
13
+2 posted in 30 days
Grants
$275k
1 grant · CORDIS
Backers
3
Coral Capital, InMotion Ventures
The money's age
Fresh money
2 months since the last round · and hiring
Momentum
26/100
hiring for its size, fresh money
Last sign of life
this month
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Sep 18
Board appointment Tom Chi, Director · SEC Form D
Sep 10
Raised a round Venture round $19.4M · SEC Form D
2025
Team of 30 was 14 · US Form 5500 (plan participants)
Sep 1, 2024
Won a grant $275k · CORDIS
2022
Founded
Tractionpublic signals, read monthly
Web presence
top 6%
of 133.2M domains by links, Common Crawl
Funding rounds
| Round | Date | Amount | Investors | Source |
|---|---|---|---|---|
| Venture round | Sep 2026 | $19.4M | — | SEC Form D |
| Grant | Sep 2024 | $275k | — | CORDIS |
| Venture round | Jun 2024 | $9.6M | — | SEC Form D |
Registers and programsofficial lists and records that name the company
| Legal entity | SirenOpt, Inc. | its site |
Founders and leadersfrom filings, registers and the company's site
Jared O'LearyExecutive Officer, DirectorSEC Form D
Backed byfrom the funds' portfolios and accelerator catalogs
Coral Capital 
InMotion Ventures 
Wireframe Ventures Investors in similar startupsfunds that back the companies most like this one
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Jobs
$180k – $240k per year · In office · Full-Time · 10+ years exp · Master's Degree · San Leandro
Python
PyQt
Tkinter
AI/ML
Machine Learning
DevOps
GitHub Actions
GitLab CI
CI/CD
Jenkins
Docker
Linux
TCP/IP
Cybersecurity
Wireshark
Game Dev
Unity
Chips/EDA
PetaLinux
Management
Confluence
Jira
QA
Pytest
Apply
$120k – $160k per year · In office · Full-Time · Bachelor's Degree · San Leandro
Python
C
C++
Valgrind
C++
CMake
Qt
AI/ML
Copilot
Cursor
Claude Code
Machine Learning
DevOps
gRPC
CI/CD
Git
Linux
Apply
$120k – $170k per year · In office · Full-Time · 3+ years exp · Bachelor's Degree · San Leandro
Python
PostgreSQL
AI/ML
Self-Supervised Learning
Anomaly Detection
Time Series
Machine Learning
Apply
$160k – $240k per year · In office · Full-Time · 8+ years exp · Bachelor's Degree · San Leandro
Python
C
C++
Valgrind
C++
CMake
Qt
AI/ML
Machine Learning
DevOps
CI/CD
Git
Linux
Apply
$140k – $190k per year · In office · Full-Time · 6+ years exp · PhD · San Leandro
Python
DVC
MLFlow
Scikit-learn
SciPy
Multimodal AI
NLP
NumPy
PyTorch
Time Series
Recommender Systems
Machine Learning
DevOps
Rest API
gRPC
CI/CD
Git
Apply
$155k – $190k per year · In office · Full-Time · 5+ years exp · Bachelor's Degree · San Leandro
Machine Learning
Design
Figma
Management
Jira
Agile
Apply
$180k – $220k per year · In office · Full-Time · 5+ years exp · Bachelor's Degree · San Leandro
Python
MATLAB
Machine Learning
Apply
Salary insights
Compensation ranges based on this company's open jobs
Median
$190k
Typical range
$160k – $240k
Open positions
13
13
Jobs
Junior
15.4%
Middle
7.7%
Senior
23.1%
Staff
53.8%
| Level | Jobs | Median | Typical range |
|---|---|---|---|
| Junior | 2 | $165k | $160k – $170k |
| Middle | 1 | $170k | $170k |
| Senior | 3 | $190k | $170k – $190k |
| Staff | 7 | $190k | $190k – $240k |
Highest paying role
Senior/Staff Software Engineer - C++
$240k
Normalized to USD per year
All salaries at SirenOpt
By role, level and city, against the market · 13 jobs with pay
Visa sponsorship
3
H-1B filings in 12 months
$116k
Median offered salary
13
Open roles in United States
Who they sponsor
Materials engineers
2
Mechanical engineers
1
In the register as SirenOpt Inc., Oakland, CA (+1 more)
Other sponsors in the same field
MIPS 25 filings
Delphon Industries 2 filings
Hollingsworth & Vose 2 filings
Sepion Technologies, Inc. 1 filings
See 13 open roles Alert me
US Department of Labor · latest filing Apr 17, 2026 · Visa details by country
Growth
Hiring Momentum
31/100
Slowing
Open positions
13
0 opened / 0 closed in 30 days
Median time-to-fill
144 days
faster than 8% of the market
ATS activity
Every ~5 hours
Today
Hiring Dynamics
0%
Hiring Focus
The percentage next to each role is its share of the company's job openings over the last 90 days; the arrow shows the shift versus the previous period.
Industrial Engineering
33% ▲
Backend
17% ▲
Data Science
8% ▲
Hardware
8% ▲
Product
8% ▲
Marketing
8% ▲
Activity Timeline
Added Verification & Validation to stack
Oct 2026
Added Minitab to stack
Oct 2026
Added FMEA to stack
Oct 2026
Added Statistical Process Control to stack
Oct 2026
Added JMP to stack
Oct 2026
Added Unity to stack
Oct 2026
Added CAPA to stack
Oct 2026
Added Cursor to stack
Oct 2026
Added Copilot to stack
Oct 2026
Added Claude Code to stack
Oct 2026
Added SolidWorks to stack
Oct 2026
Added Machine Learning to stack
Sep 2026
People
Jared O'Leary
Executive Officer, Director
Matthew Blaine
Director
Matthew Blain
Director
Philip Harper
Director
Ali Mesbah
Director
Tom Chi
Director
Names and roles come from public filings, company registers and the company's own site. Is this you? Correct or remove · How we handle this data
Tech stack
Technologies named in job postings at SirenOpt over the last 12 months, by layer, with the share of postings for each.
Technologies in use
52
Postings analysed
16
Stack modernity
67/100
Languages
Python56%
MATLAB19%
C++13%
C13%
Frameworks & libraries
Qt13%
NumPy6%
PyTorch6%
Pytest6%
Databases
PostgreSQL13%
Redis6%
Cloud & platforms
Linux25%
Figma6%
Sentry6%
GitHub Actions6%
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Full SirenOpt tech stack
52 technologies · by team · pay by technology · changes · similar stacks
Connections
List
Graph
Found in company registers, site code, DNS and hiring. Each connection shows how sure we are and the evidence, with its source and date.
Shared investors
Click a company to open it. Dashed lines are likely connections. The second step of the network is part of the Pro plan.
Owner
Same company
Same group
Likely
Offices
Where the company hires and what each office is for
Cities
1
Hiring now
1
Countries
1
Busiest office
San Leandro
San Leandro
United States
HQ
13 open roles 12 posted in 90 days 46% engineering 50-200 est. staff $193k Avg Salary
hires for Industrial Engineering, Backend, Hardware