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Mid-Level Startup Jobs — 10453 Open Roles | BuildList

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Jobs/Mid-Level Startup Jobs

Mid-Level Startup Jobs

Mid-level roles at startups building the future — own real scope, fast.

10,453 open roles · Updated 8/11/2026

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Energy & Climate👥 Business & People Ops · Mid-Level

Executive Assistant

Torrance, CA

Energy & Climate📋 Product, Programs, & Systems · Mid-Level

Executive Technical Analyst

Torrance, CA

AI Research🤖 AI & Autonomy · Mid-Level

Researcher, Frontier Risk Mitigations

San Francisco, CA

AI Research🔒 Infrastructure, IT, & Security · Mid-Level

Maintenance Analyst, Data Center Delivery

Remote·San Francisco, CA · Seattle, WA

AI Research📦 Supply Chain & Procurement · Mid-Level

Technical Commodity Manager - Robotics

San Francisco, CA

AI Research🤖 AI & Autonomy · Mid-Level

Researcher, Recursive Self-Improvement Safety

San Francisco, CA

AI Research📣 Business Dev & Customer Ops · Mid-Level

Client Partner - Media & Entertainment, Ads Solutions

Remote

Boom Supersonic

Aerospace⚙️ Mechanical & Physical Systems · Mid-Level

Materials Engineer (Lab & Test)

Centennial, CO

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Mid-Level

Boom Supersonic

Aerospace🏭 Manufacturing & Production · Mid-Level

Production Coordinator

Centennial, CO

Transportation⚙️ Mechanical & Physical Systems · Mid-Level

Mechanical Engineer - Turbomachinery

San Carlos, CA

AI Research💻 Software & Data · Mid-Level

Software Engineer, Silicon Design Methodology

San Francisco, CA

AI Research📋 Product, Programs, & Systems · Mid-Level

Product Designer, Engineering Acceleration

Seattle, WA · San Francisco, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Mid-Level

Turbomachinery Mechanical Designer

Torrance, CA

AI Research💻 Software & Data · Mid-Level

Android Systems Engineer, Consumer Devices

San Francisco, CA

Energy & Climate⚙️ Mechanical & Physical Systems · Mid-Level

Structures Engineer, Turbomachinery Static Hardware

Torrance, CA

AI Research📋 Product, Programs, & Systems · Mid-Level

Product Designer, Payments

San Francisco, CA

AI Research🏭 Manufacturing & Production · Mid-Level

PCBA Manufacturing Engineer

Remote·Seattle, WA · San Francisco, CA

AI Research🤖 AI & Autonomy · Mid-Level

Research Engineer / Research Scientist / AI Systems Engineer, RSI

Remote·San Francisco, CA

Energy & Climate✅ Test, Quality, & Reliability · Mid-Level

Quality Assurance Laboratory Technician

Orangeville, UT

AI Research🤖 AI & Autonomy · Mid-Level

Researcher, Alignment CoT Monitorability

San Francisco, CA

AI Research🤖 AI & Autonomy · Mid-Level

San Francisco, CA

AI Research💻 Software & Data · Mid-Level

Full-Stack Engineer, ChatGPT Education & Learning

San Francisco, CA · New York City, NY

AI Research🤖 AI & Autonomy · Mid-Level

Researcher, Frontier Cybersecurity Risks

San Francisco, CA

AI Research🤖 AI & Autonomy · Mid-Level

Research Engineer / Research Scientist - Personal AGI, Personalization

San Francisco, CA

Boom Supersonic

Aerospace✅ Test, Quality, & Reliability · Mid-Level

Hardware Quality Engineer

Centennial, CO

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Frequently asked questions

How many mid-level roles are on BuildList?: There are currently 10,453 open mid-level roles on BuildList, refreshed hourly from company career pages.
What kinds of mid-level roles are listed?: Mid-level roles at startups building the future — own real scope, fast. You can filter by sector, company stage, role type, and location.
Are there remote mid-level roles?: Yes — use the location filter or the remote view to see fully-remote mid-level openings.
How do I apply for mid-level roles?: 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.