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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

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Open roles

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

20 results on this page
Jobs per page
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20 results on this page
Jobs per page
PreviousPage 52Next
Pacific Fusion logo
Senior Project Engineer, Steel Structures
1/20Posted 2 weeks ago

Pacific Fusion · San Leandro, Alameda County, California

$160,000 - $220,000
Onsite
Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Welding
Posted 2 weeks agoSee job

Pacific Fusion is hiring a Senior Project Engineer to lead the procurement, fabrication, and installation of structural steel systems for its inertial fusion facility. This role manages vendor scopes, schedules, and cross-functional coordination to deliver critical infrastructure.

Pacific Fusion logo
Senior Structures Engineer
2/20Posted 2 weeks ago

Pacific Fusion · Fremont, Alameda County, California

$156,500 - $234,800
Onsite
Pacific Fusion logo
Senior Structures Engineer
3/20Posted 2 weeks ago

Pacific Fusion · San Leandro, Alameda County, California

$175,900 - $265,800
Onsite
Pacific Fusion logo
OBA Research Scientist/Engineer – Fusion Energy Systems
4/20Posted 2 weeks ago

Pacific Fusion · San Leandro, Alameda County, California

$200,000 - $350,000
Onsite
Pacific Fusion logo
Senior Mechanical Engineer
5/20Posted 2 weeks ago

Pacific Fusion · San Leandro, Alameda County, California

$156,500 - $234,800
Onsite
Pacific Fusion logo
Senior Full Stack Developer
6/20Posted 2 weeks ago

Pacific Fusion · San Leandro, Alameda County, California

$138,000 - $207,000
Onsite
Pacific Fusion logo
Indirect Purchasing & Ops Coordinator
7/20Posted 2 weeks ago

Pacific Fusion · Los Lunas, Valencia County, New Mexico

$33.03 - $49.57
Onsite
Pacific Fusion logo
Electro-Mechanical Build Technician
8/20Posted 2 weeks ago

Pacific Fusion · Los Lunas, Valencia County, New Mexico

$33.03 - $58.32
Onsite
Pacific Fusion logo
Quality Lead
9/20Posted 2 weeks ago

Pacific Fusion · Los Lunas, Valencia County, New Mexico

$116,000 - $174,000
Onsite
Pacific Fusion logo
Senior Tooling Engineer
10/20Posted 2 weeks ago

Pacific Fusion · Los Lunas, Valencia County, New Mexico

$147,700 - $221,600
Onsite
Pacific Fusion logo
Manufacturing Engineer
11/20Posted 2 weeks ago

Pacific Fusion · Los Lunas, Valencia County, New Mexico

$116,000 - $174,000
Onsite
Pacific Fusion logo
Infrastructure Electrical Engineer
12/20Posted 2 weeks ago

Pacific Fusion · Albuquerque, Bernalillo County, New Mexico

$116,000 - $174,000
Onsite
Pacific Fusion logo
Senior Project Engineer, Steel Structures
13/20Posted 2 weeks ago

Pacific Fusion · Albuquerque, Bernalillo County, New Mexico

$145,000 - $185,000
Onsite
Pacific Fusion logo
Infrastructure Mechanical Engineer
14/20Posted 2 weeks ago

Pacific Fusion · Albuquerque, Bernalillo County, New Mexico

$116,000 - $174,000
Onsite
Pacific Fusion logo
Facilities Engineer
15/20Posted 2 weeks ago

Pacific Fusion · Albuquerque, Bernalillo County, New Mexico

$120,000 - $170,000
Onsite
Pacific Fusion logo
Senior Security Engineer
16/20Posted 2 weeks ago

Pacific Fusion · San Leandro, Alameda County, California

$150,000 - $200,000
Onsite
Pacific Fusion logo
Controls Hardware Engineer
17/20Posted 2 weeks ago

Pacific Fusion · San Leandro, Alameda County, California

$138,100 - $207,100
Onsite
Pacific Fusion logo
Storytelling Lead
18/20Posted 2 weeks ago

Pacific Fusion · San Leandro, Alameda County, California

$160,000 - $190,000
Onsite
Pacific Fusion logo
Senior Mechanical Engineer - Pulsed Power
19/20Posted 2 weeks ago

Pacific Fusion · Fremont, Alameda County, California

$140,000 - $200,000
Onsite
Pacific Fusion logo
Controller
20/20Posted 2 weeks ago

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
CAD
Creo
DFM/DFA (Design for Manufacturability & Assembly)
Finite Element Analysis
Posted 2 weeks agoSee job

Pacific Fusion is seeking a Senior Mechanical Engineer to lead the design, structural analysis, and integration of large structures for its fusion energy systems. The role involves mentoring junior engineers and driving development efforts, requiring 5+ years of experience and expertise in CAD and FEA.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD Software Proficiency
GD&T
Mechanical Design
Structural Analysis
Posted 2 weeks agoSee job

Pacific Fusion is seeking a Senior Structures Engineer to design, analyze, and validate critical mechanical and structural systems for its fusion energy systems. The role involves temporary structures, seismic restraints, FEA, and collaboration with construction teams. Requires 10+ years of experience and expertise in ASME/OSHA codes.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
AI/ML
Control Systems
Posted 2 weeks agoSee job

Pacific Fusion seeks national laboratory scientists and engineers to participate in fusion energy R&D through the CHIPS Act OBA program. This role involves leading fusion energy projects, from target design to diagnostics, with flexible 5-40 hour weeks and competitive compensation.

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 2 weeks agoSee job

Pacific Fusion is seeking a Senior Mechanical Engineer to lead the design, development, and validation of mechanical components for advanced fusion energy systems. The role involves structural analysis, design reviews, and collaboration with multidisciplinary teams. Requires 6+ years of experience and proficiency in CAD (Creo), FEA, and CFD.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Apache Kafka
CI/CD
Figma
Go (Golang)
+6 more
Posted 2 weeks agoSee job

Pacific Fusion is hiring a Senior Full Stack Developer to architect and develop data acquisition systems and web front ends for their inertial fusion energy systems. The role involves building full-stack applications, databases, and APIs to support the pulser factory and Demonstration System. Requires 7+ years of experience with React and backend development.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
ERP Systems
Posted 2 weeks agoSee job

Pacific Fusion is seeking an Indirect Purchasing & Ops Coordinator to manage indirect purchasing, vendor relationships, and facility operations at our Los Lunas, NM manufacturing facility. This role will establish scalable purchasing processes and support day-to-day operations.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD Software Proficiency
CNC Machining
Machining
Welding
Posted 2 weeks agoSee job

Pacific Fusion is building a pulser-driven inertial fusion system to achieve net facility gain. As an Electro-Mechanical Build Technician, you will support engineering and delivery teams in setting up automated manufacturing lines and in assembly, testing, and validation of components.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Failure Mode and Effects Analysis (FMEA)
Internet of Things
Manufacturing Execution Systems (MES)
Quality Management Systems
Posted 2 weeks agoSee job

Pacific Fusion seeks a Quality Lead to develop and implement its Quality Management System, drive manufacturing quality, and ensure safety compliance. This role partners with Operations, Engineering, and Supply Chain to build scalable quality systems and a culture of safety and quality.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD
Finite Element Analysis
Structural Analysis
Posted 2 weeks agoSee job

Pacific Fusion is seeking a Senior Tooling Engineer to design, analyze, and procure custom handling equipment for lifting and transportation of large hardware. This role requires expertise in heavy lifts, structural analysis, and CAD, and will be onsite in Los Lunas, NM.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
DFM/DFA (Design for Manufacturability & Assembly)
Internet of Things
Manufacturing Execution Systems (MES)
Python
Posted 2 weeks agoSee job

Pacific Fusion is seeking a Manufacturing Engineer to evaluate and improve manual processes, implement automation, and support production in a fast-paced fusion energy startup. The role involves designing tools, writing work instructions, and collaborating with cross-functional teams to bring a demonstration system online.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Posted 2 weeks agoSee job

Pacific Fusion seeks an Infrastructure Electrical Engineer to oversee facility electrical equipment integration for its nuclear fusion demonstration system in Albuquerque, NM. The role covers design, construction, operations, and maintenance of building electrical systems.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Welding
Posted 2 weeks agoSee job

Pacific Fusion is seeking a Senior Project Engineer - Steel Structures to lead procurement, installation, and commissioning of structural steel systems for their inertial fusion energy program. This role involves managing fabrication and construction across multiple sites with up to 50% travel.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
HVAC
Posted 2 weeks agoSee job

Pacific Fusion is seeking an Infrastructure Mechanical Engineer to oversee mechanical building systems for a nuclear fusion demonstration system. Based in Albuquerque, NM with travel to San Leandro, CA. Requires 7+ years experience in industrial/research facility systems.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Posted 2 weeks agoSee job

Pacific Fusion seeks a Senior Facilities Engineer to act as the technical bridge between the fusion demonstration system design team and facility infrastructure, overseeing integration of complex M&E systems. Based in Albuquerque, NM with travel to San Leandro, CA, this role requires 10+ years of experience in large-scale industrial or scientific research facilities.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Encryption
Endpoint Security
Identity and Access Management
ISO 27001
+11 more
Posted 2 weeks agoSee job

Pacific Fusion is hiring a Senior Security Engineer to implement and maintain security controls across IT, SaaS, and endpoints. The role focuses on MDM, endpoint security, and compliance (NIST, SOC 2, ISO 27001). Requires 5+ years of experience.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
CAD
Posted 2 weeks agoSee job

Pacific Fusion is hiring a Controls Hardware Engineer to design and implement control system hardware for its inertial fusion system. The role involves gathering requirements, designing control architectures, and working with PLCs, VFDs, and safety systems.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Posted 2 weeks agoSee job

Pacific Fusion is hiring a Storytelling Lead to shape the narrative around its inertial fusion energy technology. This senior writer will turn complex technical work into clear, credible stories, working with executives and scientists to communicate progress and mission.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
ANSYS
Control Systems
Data Analysis
MATLAB
+3 more
Posted 2 weeks agoSee job

Pacific Fusion is seeking a Senior Mechanical Engineer to design, build, and operate pulsed power systems for its inertial fusion platform. This hands-on role involves high-voltage systems, controls, diagnostics, and data analysis, with a focus on advancing the core experimental platform.

Series A
Funded 2 yr ago
$1B-$10B
General Catalyst
Lightspeed Venture Partners
Posted 2 weeks agoSee job

Controller role at Pacific Fusion responsible for all accounting and financial operations, including monthly close, financial reporting, and team leadership.