Mainspring Energy
mainspringenergy.com
Actively hiring
Alternative Fuels
Power Grid
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Salaries
Products
People
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Offices
Jobs
Financials
How Mainspring Energy hires
Truth index
B 82/100
Median time to fill
72 days
Ghost roles
0%
Stale roles
52%
Reposted roles
0%
Mainspring Energy scores B on the Alion truth index (A is best, E worst), measured over 23 open roles re-checked against its own hiring board: 0% look like ghost listings, 52% have gone stale and 0% are the same role posted again. Its roles close in a median of 72 days. 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
Visa sponsorship
- United States · H-1B filings in 12 months: 22 · green card filings: 5
Overview
Mainspring Energy is a power generation company that develops and builds linear generators, which convert natural gas, biogas, hydrogen and other fuels into electricity through a low-temperature reaction instead of combustion. Founded in 2010 by Stanford engineers Shannon Miller, Adam Simpson and Matt Svrcek, it sells onsite generators to commercial, industrial and utility customers for resilient, lower-emission power. The company is headquartered in Menlo Park, California, United States.
News
Mainspring Energy: $258 Million (Series F) Raised For Scaling Linear Generator Business
Mainspring Energy announced that it has secured $258 million in a Series F funding round to expand its linear generator power business and operations as it grows in manufacturing and customer sales. General Catalyst led the raise. They were joined by Amaz
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Report
ABM and Mainspring Energy Sign Strategic Partnership
--ABM, a leading provider of integrated facility services, infrastructure solutions, and parking management today announced a strategic partnership with Mainspring Energy, Inc., in which ABM will deploy Mainspring's cutting-edge Linear Generator technolog
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Report
Tech stack
Technologies named in job postings at Mainspring Energy over the last 12 months, by layer, with the share of postings for each.
Technologies in use
56
Postings analysed
63
Stack modernity
76/100AI adopter
Languages
Python54%
C++27%
MATLAB17%
Julia3%
Frameworks & libraries
Ray6%
NumPy3%
SciPy3%
LangChain2%
Databases
Snowflake2%
Cloud & platforms
GCP8%
RTOS8%
AWS8%
Linux6%
AI & ML
Claude3%
LLM2%
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Full Mainspring Energy tech stack
56 technologies · by team · pay by technology · changes · similar stacks
Salary insights
Compensation ranges based on this company's open jobs
Median
$164k
Typical range
$52k – $335k
Open positions
78
76
Jobs
Junior
9.2%
Middle
7.9%
Senior
31.6%
Staff
42.1%
Principal
1.3%
Architect
7.9%
| Level | Jobs | Median | Typical range |
|---|---|---|---|
| Junior | 7 | $115k | $52k – $213k |
| Middle | 6 | $75k | $70k – $149k |
| Senior | 24 | $149k | $92k – $220k |
| Staff | 32 | $184k | $123k – $230k |
| Principal | 1 | $247k | $247k |
| Architect | 6 | $271k | $230k – $335k |
Highest paying role
Vice President, Electrical Engineering
$335k
Normalized to USD per year
All salaries at Mainspring Energy
By role, level and city, against the market · 78 jobs with pay
People
Adam Simpson
Executive Officer, Director
Shannon Miller
Executive Officer, Director
Samir Kaul
Director
Alexander Weiss
Director
Eric Kosmowski
Director
Shyam Kamadolli
Director
Nael Kassar
Director
Jagdeep Singh
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
Growth
Hiring Momentum
67/100
Growing
Open positions
80
7 opened / 19 closed in 30 days
Median time-to-fill
71 days
faster than 18% of the market
ATS activity
Every ~4 hours
Today
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
30% ▼
Field & Service
14% ▲
Hardware
13% ▲
QA
5% ▼
Leadership
5% ▼
Product
5% ▲
Actively hiring for Field & Service (+4 in 30 days)
Activity Timeline
Added SciPy to stack
Oct 2026
Added NumPy to stack
Oct 2026
Added Microsoft Excel to stack
Oct 2026
Added Tableau to stack
Oct 2026
Added Microsoft Office to stack
Oct 2026
Added TCP/IP to stack
Sep 2026
Added Linux to stack
Sep 2026
Added Kanban to stack
Sep 2026
Added Sensor Fusion to stack
Sep 2026
Added gRPC to stack
Sep 2026
Added Agile to stack
Sep 2026
Added Scrum to stack
Sep 2026
Offices
Where the company hires and what each office is for
Cities
4
Hiring now
4
Countries
2
Busiest office
Menlo Park
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Headquarters
Builds here
Office with open vacancies
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Menlo Park
United States
HQ
The right solution at the right time.
77 open roles 67 posted in 90 days 25% engineering 4% remote 1000-5000 est. staff $174k Avg Salary
hires for Industrial Engineering, Hardware, Field & Service
3601 Haven Avenue, Menlo Park, CA 94025
Salinas
United States
2 open roles 10-50 est. staff $85k Avg Salary
hires for Field & Service
Houston
United States
1 open roles 2 posted in 90 days 100% remote 50-200 est. staff $92k Avg Salary
hires for Field & Service
Monterrey
Mexico
1 open roles 10-50 est. staff
hires for Industrial Engineering
Earlier presence
Washington, United States
Columbus, United States
Jobs
$130k – $153k per year • In office • 5+ years exp • Bachelor's Degree • Menlo Park
SolidWorks
Apply
$130k – $153k per year • In office • Master's Degree • Menlo Park
Python
SciPy
NumPy
Apply
$156k – $184k per year • In office • Master's Degree • Menlo Park
Python
SciPy
NumPy
Apply
$160k – $190k per year • In office • 16+ years exp • Bachelor's Degree • Menlo Park
Python
C++
Ansible
RTOS
CI/CD
Docker
Kubernetes
Configuration Management
GitLab
Management
Linear
Jira
Apply
$125k – $213k per year • In office • 2+ years exp • Bachelor's Degree • Menlo Park
Python
C++
Linear
Confluence
Jira
Apply
$151k – $178k per year • Hybrid • 15+ years exp • Menlo Park
Apply
$135k – $159k per year • In office • Menlo Park
Python
LangChain
AI Agents
LLM
Google ADK
LLM Guardrails
Agentic Workflows
Tool Use
DevOps
Terraform
GCP
CI/CD
AWS
Kubernetes
Self-Healing
Google Cloud Run
GitHub
GitLab
IAM
Apply
$135k – $159k per year • In office • 6+ years exp • Bachelor's Degree • Menlo Park
Python
C++
CI/CD
Apply
$181k – $213k per year • In office • 8+ years exp • Bachelor's Degree • Menlo Park
Python
C++
Linear
Confluence
Jira
Apply
$147k – $173k per year • In office • 5+ years exp • Bachelor's Degree • Menlo Park
Python
C++
Linear
Confluence
Jira
Apply
$200k – $265k per year • Hybrid • 10+ years exp • Bachelor's Degree • Menlo Park
Python
MATLAB
Ray
Cybersecurity
CAPA
Apply
$170k – $200k per year • Hybrid • 12+ years exp • Bachelor's Degree • Menlo Park
Linux
Management
Agile
Scrum
Kanban
Apply
Financials
Total raised
$258M
Latest round
Series F
Funding rounds
1
Funding rounds
| Round | Announced | Amount | |
|---|---|---|---|
| Series F | 2025 | $258M | Details |