Updated Oct 24, 2026
Mainspring Energy jobs
Open roles at Mainspring Energy in software, product, data, design, marketing and business, read straight from its careers site.
Mainspring Energy has 77 open roles, 8 of them new in the last 7 days. The company added 22 new roles and closed 27 roles in the last 30 days. Engineering accounts for 61% of open roles, with 47 positions. Design is the next largest team with 7 open roles, or 9%.
Most roles are in Menlo Park, CA, with 69 openings, or 90% of the total. Remote roles account for 8% of openings. Mainspring Energy's latest SEC filing shows $108.1M sold in its Series B round, first sold on 2020-12-16.
New roles posted last week were 1, compared to 7 the week before. This difference is too large to compare fairly, as a reading of the numbers.
76open now
5new in 7 days
27closed in 30 days
Mainspring Energy careers site, where every role is posted first.
Newest roles
- Staff Mechanical Engineer – Continuous Improvement for Mechanical Design & Quality Control
- Software Deployment Operations Manager
- Vice President, Electrical Engineering
- Staff Power Systems Site Integration Engineer
- Staff Project Engineer - Grid Scale
- Senior Product Integration Engineer (CAD)
- Senior Product Performance Engineer
- Staff Product Performance Engineer
- Senior Staff Software Test & Automation Engineer
- Manager, CAD & Design Systems
- FP&A Manager — Services
- Sustaining Controls Engineer
- Corporate Paralegal
- Staff Mechanical Engineer, Sealing Systems
- Senior Reaction Controls Engineer
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| Engineering | 46 | |
|---|---|---|
| Other | 13 | |
| Design | 8 | |
| Finance, legal and people | 2 | |
| Customer success | 2 | |
| Product | 2 | |
| Operations | 1 | |
| Sales | 1 | |
| Data and AI | 1 |
Where
| Menlo Park, CA | 67 | |
|---|---|---|
| Remote | 6 | |
| Monterrey, Nuevo León | 3 |
New roles by week
Roles Mainspring Energy posted each week, counted when we first saw them. We began reading Mainspring Energy's board on 2026-09-09.
| Week of Sep 7 | 3 |
|---|---|
| Week of Sep 14 | 11 |
| Week of Sep 21 | 5 |
| Week of Sep 28 | 7 |
| Week of Oct 5 | 1 |
| Week of Oct 12 | 9 |
| Week of Oct 19 | 3 |
Funding from SEC filings
Form D filings by Mainspring Energy, Inc. Rounds are our estimate from the amount sold; filings name no round.
| First sale | Amount sold | Est. round |
|---|---|---|
| 2020-12-16 | $108.1M | Series B |
| 2017-08-29 | $83.3M | Series A |
Named in the latest filing: Shannon Miller (Executive Officer, Director), Adam Simpson (Executive Officer, Director), Samir Kaul (Director), Jagdeep Singh (Director), Alexander Weiss (Director), Nael Kassar (Director), Shyam Kamadolli (Director), Eric Kosmowski (Director).
Questions
Is Mainspring Energy hiring right now?
Yes. Mainspring Energy has 76 open roles in software, product, data, design, marketing and business as of Oct 24, 2026, and posted 5 new ones in the last 7 days.
What teams is Mainspring Energy hiring for?
Most open roles are in Engineering: Engineering 46, Other 13, Design 8, Finance, legal and people 2, Customer success 2.
Where is Mainspring Energy hiring?
The most roles are in Menlo Park, CA. Top places: Menlo Park, CA (67); Remote (6); Monterrey, Nuevo León (3).
Has Mainspring Energy raised money recently?
The latest Form D filed by Mainspring Energy, Inc. reports $108.1M sold, first sale 2020-12-16, which we estimate as Series B.
Does Mainspring Energy sponsor H-1B visas?
We found no clear H-1B history under Mainspring Energy's name in USCIS's fiscal 2023 data. That doesn't mean it won't sponsor: newer companies and employers that file under another legal name aren't in it. Check the posting or ask the recruiter.