SirenOpt
sirenopt.com
Actively hiring
Electrical & Electronic Engineering
Advanced Materials
Manufacturing
View 2 jobs
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Overview
Technologies
Salaries
Products
People
Growth
Offices
Jobs
Financials
Funding and backers
Total raised
$9.6M
1 round on record
Latest round
$9.6M
Venture round · Jun 2024 · 2 yr ago
Team
30
US Form 5500 (plan participants) · Dec 2025 · +114% in a year
Hiring now
4
open roles
Backers
1
Wireframe Ventures
The money's age
Long since its last round
26 months since the last round · hiring slowed
Momentum
0/100
no fresh signals
Last sign of life
this month
a posting or a news item
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 | 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
Wireframe Ventures Similar startupsby what they do, their industry and backers
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How SirenOpt hires
Truth index
B 75/100
Ghost roles
0%
Stale roles
100%
Reposted roles
0%
SirenOpt scores B on the Alion truth index (A is best, E worst), measured over 4 open roles re-checked against its own hiring board: 0% look like ghost listings, 100% have gone stale and 0% are the same role posted again. It measures how much of what this employer publishes turns into a real, finite search - not the employer as a workplace. How the index is computed
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
10
Postings analysed
4
Stack modernity
72/100
Languages
Python
MATLAB
TypeScript
Databases
PostgreSQL
Redis
Cloud & platforms
Linux
Sentry
Sign in to see how your skills match this stack
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Full SirenOpt tech stack
10 technologies · by team · pay by technology · changes · similar stacks
Salary insights
Compensation ranges based on this company's open jobs
Median
$240k
Typical range
$190k – $246k
Open positions
4
4
Jobs
Staff
100%
| Level | Jobs | Median | Typical range |
|---|---|---|---|
| Staff | 4 | $240k | $190k – $246k |
Highest paying role
Lead Software Engineer
$246k
Normalized to USD per year
People
Jared O'Leary
Executive Officer, Director
Matthew Blaine
Director
Names and roles come from public filings, company registers and the company's own site. Is this you? Correct or remove
Growth
Hiring Momentum
54/100
Stable
Open positions
4
0 opened / 0 closed in 30 days
ATS activity
Every ~13 hours
09/26/2026
Hiring Dynamics
+100%
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
50% ▼
Backend
25% ▼
Hardware
25% ▼
Activity Timeline
Added Machine Learning to stack
Sep 2026
Added Linux to stack
Sep 2026
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
4 open roles 50% engineering 50-200 est. staff $229k Avg Salary
hires for Industrial Engineering, Backend, Hardware
Jobs
$160k – $240k per year • In office • 5+ years exp • Bachelor's Degree • San Leandro
Python
MATLAB
Machine Learning
Apply
$200k – $246k per year • In office • San Leandro
Python
TypeScript
PostgreSQL
Redis
AI/ML
Machine Learning
DevOps
CI/CD
Linux
QA
Sentry
Apply
Financials
Total raised
$9.6M
Latest round
Venture - Series Unknown
Funding rounds
1
Funding rounds
| Round | Announced | Amount | |
|---|---|---|---|
| Venture - Series Unknown | 2024 | $9.6M | Details |