How many Series B startup jobs are on BuildList?

There are currently 3,235 open roles at Series B companies on BuildList, refreshed hourly from company career pages.

What is it like to work at a Series B startup?

Explore open roles at Series B companies. Filter by sector or role type to focus your search.

Which industries are hiring at Series B companies?

Roles at Series B companies span AI, defense, aerospace, robotics, energy, and more.

How do I apply to Series B startup jobs?

Every listing links straight to the company's own application page — BuildList doesn't sit between you and the employer, so there's no account or middleman.

Series B Startup Jobs — 3235 Open Roles — Page 124

Valar Atomics Senior Nuclear Supplier Quality Engineer

Torrance, CA

$165k–$225k / year

Job type: Test, Quality, & Reliability
Seniority: Senior
Sector: Energy & Climate

Apply

LangChain Enterprise Account Executive (SoCal)

Remote · Los Angeles, CA

$350k / year

Job type: Business Dev & Customer Ops
Seniority: Senior
Sector: AI App

Apply

Harmattan AI Mechanical Engineer - GCS

France

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Defense

Apply

Cowboy Space Corporation Senior Spacecraft Engineer

Kent, WA · Washington, D.C.

$150k–$200k / year

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Aerospace

Apply

Mach Industries Flight Software Engineer

Huntington Beach, CA

Job type: Software & Data
Seniority: Mid-Level
Sector: Defense

Apply

Valar Atomics Supplier Quality Engineer

Torrance, CA

Job type: Product, Programs, & Systems
Seniority: Senior
Sector: Energy & Climate

Apply

LangChain Sales Engineer (Bay Area)

San Francisco, CA

$185k–$315k / year

Job type: Business Dev & Customer Ops
Seniority: Mid-Level
Sector: AI App

Apply

Harmattan AI Mechanical Engineer (Hardware Tooling)

France

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Defense

Apply

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Cowboy Space Corporation Lead Mechanical Engineer, Compute Systems

San Carlos, CA

$150k–$225k / year

Job type: Mechanical & Physical Systems
Seniority: Manager
Sector: Aerospace

Apply

Mach Industries Senior Software Engineer, Infrastructure & Simulation

Huntington Beach, CA

Job type: Software & Data
Seniority: Entry-Level
Sector: Defense

Apply

Valar Atomics Senior Accountant

Torrance, CA

Job type: Product, Programs, & Systems
Seniority: Senior
Sector: Energy & Climate

Apply

LangChain Senior Software Engineer, Database (SmithDB)

San Francisco, CA

$175k–$240k / year

Job type: Software & Data
Seniority: Senior
Sector: AI App

Apply

Harmattan AI Aerothermal Engineer

Switzerland

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Defense

Apply

Cowboy Space Corporation Senior Mechanical Engineer

San Carlos, CA

$150k–$200k / year

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Aerospace

Apply

Mach Industries Principal Manufacturing Engineer, Energetics

Huntington Beach, CA

Job type: Software & Data
Seniority: Mid-Level
Sector: Defense

Apply

Valar Atomics Project Manager, Commercial Projects

Torrance, CA

Job type: Software & Data
Seniority: Mid-Level
Sector: Energy & Climate

Apply

LangChain Enterprise Account Executive, South EMEA (UK)

United Kingdom

$225k–$350k / year

Job type: Business Dev & Customer Ops
Seniority: Senior
Sector: AI App

Apply

Harmattan AI Opérateur de production - Systèmes défense

France

Job type: Manufacturing & Production
Seniority: Entry-Level
Sector: Defense

Apply

Cowboy Space Corporation Senior Mechanisms Engineer - Separation System

Kent, WA · Washington, D.C.

Job type: Software & Data
Seniority: Mid-Level
Sector: Aerospace

Apply

Mach Industries Composites Design Engineer

Huntington Beach, CA

Job type: Software & Data
Seniority: Mid-Level
Sector: Defense

Apply

Valar Atomics Construction Quality Inspector

Orangeville, UT

$67k–$83k / year

Job type: Test, Quality, & Reliability
Seniority: Entry-Level
Sector: Energy & Climate

Apply

LangChain Enterprise Account Executive (Federal)

Remote · Washington, D.C.

$300k–$350k / year

Job type: Business Dev & Customer Ops
Seniority: Senior
Sector: AI App

Apply

Harmattan AI GNC Engineer

Morocco

Job type: AI & Autonomy
Seniority: Mid-Level
Sector: Defense

Apply

Cowboy Space Corporation Senior Powerpack Engineer

Kent, WA · Washington, D.C.

Job type: Software & Data
Seniority: Mid-Level
Sector: Aerospace

Apply

Mach Industries Operations Engineer

Huntington Beach, CA

Job type: Software & Data
Seniority: Mid-Level
Sector: Defense

Apply

Series B Jobs

Weekly jobs, picked for you.

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