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Join a startup on the way up — not a bet, not a giant.

Tech roles at Series A–C companies backed by Sequoia, a16z, Benchmark & other top-tier VCs

  • Sequoia
  • a16z
  • Benchmark
  • Accel
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  • Founders Fund
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  • Sequoia
  • a16z
  • Benchmark
  • Accel
  • Greylock
  • Founders Fund
  • General Catalyst
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  • Lightspeed
  • Bessemer
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  • Insight Partners
  • IVP
  • NEA
  • Thrive Capital

Open roles

High-signal tech roles at Series A–C companies, refreshed as boards update.

20 results on this page
Jobs per page
PreviousPage 2Next
Pacific Fusion logo
Facilities Technician
1/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$46.3 - $69.42
Onsite
20 results on this page
Jobs per page
PreviousPage 2Next
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD Software Proficiency
HVAC
Machining
Posted yesterdaySee job

Pacific Fusion seeks a Facilities Technician in San Leandro, CA to install and maintain facility drops, support test builds, and ensure safe, organized workspaces for its fusion energy team.

Pacific Fusion logo
Mechanical Design Engineer
2/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$138,100 - $263,800
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD
Failure Mode and Effects Analysis (FMEA)
Posted yesterdaySee job

Pacific Fusion is seeking a Mechanical Design Engineer to design, develop, and integrate mechanical components for advanced fusion energy systems. The role focuses on vacuum seals, testing, and analysis. Requires 5+ years of mechanical design experience.

Pacific Fusion logo
Senior Security Engineer
3/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$150,000 - $200,000
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
ISO 27001
macOS
Microsoft Entra ID
Microsoft Intune
+6 more
Posted yesterdaySee job

Pacific Fusion is seeking a Senior Security Engineer to implement, monitor, and maintain security controls across IT systems, SaaS applications, and endpoints. The role involves managing MDM, access control, and incident response to support compliance. Based in San Leandro, CA.

Pacific Fusion logo
Senior Controls Infrastructure Engineer
4/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$138,100 - $207,100
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CMMC
Firewalls
Infrastructure as Code
NIST SP 800-171
Posted yesterdaySee job

Pacific Fusion is seeking a Senior Controls Infrastructure Engineer to design, deploy, and operate the network, storage, and compute infrastructure supporting its 24/7 facility operations. The role requires expertise in network architecture, Zero Trust segmentation, and compliance with NIST 800-171 and ITAR/EAR. This is a full-time onsite position in San Leandro, CA.

Pacific Fusion logo
Senior Mechanical Engineer
5/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$156,500 - $234,800
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD
Creo
DFM/DFA (Design for Manufacturability & Assembly)
Finite Element Analysis
Posted yesterdaySee job

Pacific Fusion seeks a Senior Mechanical Engineer to lead the design, development, and validation of mechanical components for advanced inertial fusion systems. The role involves structural analysis, design reviews, and cross-functional collaboration to enable commercial fusion energy.

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Pacific Fusion logo
Senior Metrology & Inspection Engineer - Target Fabrication
6/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$175,900 - $263,800
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD
GD&T
Posted yesterdaySee job

Pacific Fusion seeks a Senior Metrology & Inspection Engineer to ensure dimensional integrity and quality of precision components for its pulsed power fusion system. The role involves developing advanced metrology processes, inspection fixtures, and data-driven feedback loops to meet micron-level tolerances.

Pacific Fusion logo
Mechanical Engineer - Pulsed Power
7/20Posted yesterday

Pacific Fusion · Fremont, Alameda County, California

$115,000 - $150,000
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
ANSYS
Control Systems
MATLAB
PSCAD
+2 more
Posted yesterdaySee job

Pacific Fusion is seeking a hands-on Mechanical Engineer to design, build, and operate pulsed power systems for its inertial fusion platform. The role involves high-voltage systems, controls, diagnostics, and data analysis, with 2+ years of experience required. This is an on-site role in Fremont, CA.

Pacific Fusion logo
Senior Mechanical Engineer - Pulser Modules
8/20Posted yesterday

Pacific Fusion · Fremont, Alameda County, California

$138,100 - $263,800
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD Software Proficiency
Creo
DFM/DFA (Design for Manufacturability & Assembly)
Finite Element Analysis (FEA)
+1 more
Posted yesterdaySee job

Pacific Fusion seeks a Senior Mechanical Engineer to design, analyze, and validate mechanical systems for a pulser-driven inertial fusion platform, leading projects from concept through fabrication and test while mentoring junior engineers.

Pacific Fusion logo
Senior Buyer
9/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$125,000 - $150,000
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Coupa
NetSuite
SAP
Posted yesterdaySee job

Pacific Fusion is hiring a Senior Buyer to support sourcing and delivery of components for its fusion demonstration system. The role involves supplier negotiation, procurement strategy, and cross-functional collaboration with scientists and engineers.

Pacific Fusion logo
OBA Research Scientist/Engineer – Fusion Energy Systems
10/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$200,000 - $350,000
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Control Systems
Posted yesterdaySee job

Pacific Fusion is hiring research scientists and engineers from U.S. national laboratories to work on fusion energy systems through an Outside Business Activity (OBA) under the CHIPS and Science Act. This role involves leading R&D in areas like plasma physics, target design, and diagnostics, with flexible hours and competitive pay.

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Pacific Fusion logo
Senior Target Fabrication Engineer - Assembly
11/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$175,900 - $263,800
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD Modeling
GD&T
Posted yesterdaySee job

Pacific Fusion seeks a Senior Target Fabrication Engineer to lead precision assembly and manage end-to-end delivery of fusion targets. This role bridges design and fabrication, ensuring high-accuracy assemblies are delivered on schedule to support the company's fusion energy mission.

Pacific Fusion logo
Infrastructure Electrical Engineer
12/20Posted yesterday

Pacific Fusion · Albuquerque, Bernalillo County, New Mexico

$116,000 - $174,000
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Posted yesterdaySee job

Pacific Fusion is seeking an Infrastructure Electrical Engineer to oversee facility electrical equipment integration for a nuclear fusion demonstration system. The role covers design, construction, and operations, based in Albuquerque, NM with travel to San Leandro, CA.

Pacific Fusion logo
Senior Mechanical Design Specialist
13/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$138,100 - $207,000
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD
Creo Parametric
GD&T
PTC Windchill
Posted yesterdaySee job

Pacific Fusion is seeking a Senior Mechanical Design Specialist to develop advanced mechanical systems for fusion energy technology. The role involves CAD design, analysis, and production-ready deliverables using Creo Parametric and Windchill.

Pacific Fusion logo
Controls Hardware Engineer
14/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$138,100 - $207,100
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD
Control Systems
Posted yesterdaySee job

Controls Hardware Engineer to design and implement control systems for inertial fusion energy, including PLC-based systems, electrical schematics, and safety interlocks, working on cutting-edge fusion technology at Pacific Fusion.

Pacific Fusion logo
Senior Mechanical Engineer
15/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$138,100 - $263,800
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Additive Manufacturing
ANSYS
Creo
Finite Element Analysis
+2 more
Posted yesterdaySee job

Senior Mechanical Engineer at Pacific Fusion, focusing on design, analysis, and integration of mechanical systems for an advanced inertial fusion energy platform. Lead multidisciplinary projects, mentor junior engineers, and drive hardware from concept to delivery.

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Pacific Fusion logo
Senior Structures Engineer
16/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$175,900 - $265,800
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD
Finite Element Analysis (FEA)
GD&T
Mechanical Design
Posted yesterdaySee job

Pacific Fusion seeks a Senior Structures Engineer to design, analyze, and validate critical mechanical and structural systems for its fusion power systems. Requires 10+ years of experience, expertise in FEA, CAD, and structural codes like ASME and OSHA. Based in San Leandro, CA.

Pacific Fusion logo
Senior Full Stack Developer
17/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$138,000 - $207,000
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Apache Kafka
APIs
CI/CD
Figma
+7 more
Posted yesterdaySee job

Pacific Fusion seeks a Senior Full Stack Developer to architect and build data acquisition systems and web front ends for its pulser-driven inertial fusion program. The role involves designing databases, APIs, and React applications, and leading a team for the Demonstration System. Requires 7+ years with React, streaming, and database technologies.

Pacific Fusion logo
Controller
18/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$200,000 - $275,000
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Posted yesterdaySee job

Pacific Fusion seeks a Controller to lead all accounting and financial operations, including monthly close, financial reporting, and a team of six, supporting the company's mission to provide abundant, affordable clean energy through inertial fusion.

Pacific Fusion logo
Senior Manufacturing Engineer
19/20Posted yesterday

Pacific Fusion · San Leandro, Alameda County, California

$138,100 - $207,100
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
DFM/DFA (Design for Manufacturability & Assembly)
Fishbone Diagram
GD&T
Lean Manufacturing
+1 more
Posted yesterdaySee job

Pacific Fusion is seeking a Senior Manufacturing Engineer to own the processes, tooling, and workflows for pulser module assembly. This hands-on role involves working on the shop floor with technicians, driving continuous improvement, and partnering with design engineering to bring core fusion hardware to life.

Pacific Fusion logo
Senior Structures Engineer
20/20Posted yesterday

Pacific Fusion · Fremont, Alameda County, California

$156,500 - $234,800
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD
Creo
DFM/DFA (Design for Manufacturability & Assembly)
Finite Element Analysis
Posted yesterdaySee job

Pacific Fusion seeks a Senior Structures Engineer to lead structural analysis and integration of large steel structures for a pulser-driven inertial fusion system, aiming to provide clean, affordable energy.

Daily job alert

Get new VC-backed tech jobs in your inbox every morning.

Narrow your alert

Free daily email. Confirm via link to activate. Unsubscribe anytime.