How many Series B startup jobs are on BuildList?

There are currently 3,239 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 — 3239 Open Roles — Page 115

Valar Atomics Senior Instrumentation and Controls Engineer

Torrance, CA

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

Apply

Firestorm Senior Systems Engineer, Metal Manufacturing

San Diego, CA

$145k–$160k / year

Job type: Manufacturing & Production
Seniority: Senior
Sector: Defense

Apply

Northwood Infrastructure Engineer

Torrance, CA · Washington, D.C.

Job type: Infrastructure, IT, & Security
Seniority: Mid-Level
Sector: Aerospace

Apply

LangChain Regional Director, Enterprise Sales

Atlanta, GA

Job type: Software & Data
Seniority: Entry-Level
Sector: AI App

Apply

Cowboy Space Corporation Senior Avionics Engineer

Kent, WA · Washington, D.C.

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

Apply

Harmattan AI Warhead Engineering Team

France · Switzerland · Morocco

Job type: Mechanical & Physical Systems
Seniority: Director
Sector: Defense

Apply

Higgsfield Head of Entertainment GTM

Remote · Los Angeles, CA · San Francisco, CA

$250k–$320k / year

Job type: Software & Data
Seniority: Mid-Level
Sector: AI App

Apply

Allen Control Systems Mechanical Assembly Technician

Austin, TX

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

Apply

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Aalo Atomics Licensing Engineer

Austin, TX

Job type: Manufacturing & Production
Seniority: Mid-Level
Sector: Energy & Climate

Apply

Serval Software Engineer, Backend

San Francisco, CA

$200k–$325k / year

Job type: Software & Data
Seniority: Mid-Level
Sector: AI App

Apply

Mach Industries December 2026 New Graduate Engineer, Mechanical

Huntington Beach, CA

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

Apply

Apptronik Senior Wire Harness Engineer

Austin, TX

Job type: Electrical & Firmware
Seniority: Senior
Sector: Robotics

Apply

Fuse Energy Corporate Finance Associate

United Kingdom

Job type: Finance, Legal, & Compliance
Seniority: Mid-Level
Sector: Energy & Climate

Apply

Valar Atomics Senior Electrical Engineer

Torrance, CA

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

Apply

Firestorm Staff Electrical Engineer - Weapons

San Diego, CA

$170k–$220k / year

Job type: Electrical & Firmware
Seniority: Staff / Principal
Sector: Defense

Apply

Northwood Senior Infrastructure Engineer

Torrance, CA · Washington, D.C.

Job type: Infrastructure, IT, & Security
Seniority: Senior
Sector: Aerospace

Apply

LangChain Manager, Commercial Account Management

San Francisco, CA

$275k / year

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

Apply

Cowboy Space Corporation Senior Avionics Engineer

San Carlos, CA

$150k–$200k / year

Job type: Electrical & Firmware
Seniority: Senior
Sector: Aerospace

Apply

Harmattan AI Embedded Software Engineer - SoM

France

Job type: Electrical & Firmware
Seniority: Senior
Sector: Defense

Apply

Higgsfield Film / Commercial Director

Kazakhstan

Job type: Software & Data
Seniority: Mid-Level
Sector: AI App

Apply

Allen Control Systems Electronics Assembly Technician

Austin, TX

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

Apply

Aalo Atomics Welding Assistant

Austin, TX

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

Apply

Mach Industries Navigation Engineer

Huntington Beach, CA

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

Apply

Apptronik Staff Perception Hardware Engineer

Sunnyvale, CA

$240k–$288k / year

Job type: Electrical & Firmware
Seniority: Staff / Principal
Sector: Robotics

Apply

Fuse Energy Infrastructure Development Lead

Remote

Job type: Infrastructure, IT, & Security
Seniority: Mid-Level
Sector: Energy & Climate

Apply

Series B Jobs

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