co-founder

10,000 co-founder job listings in United States. Find daily updated positions from leading job boards.

  • Co-Founder (Tech)

    6 hours ago


    San Francisco, United States Stealth Startup AI Companion Full-time $1,000 - $60,000 Contract

    We’re building an voice AI companions in stealth – designed to redefine how humans interact with AI on a deeply personal level. I’m looking for a technical co-founder to join me on this journey. Someone who’s not just an engineer, but a true builder with the drive to take an idea from 0 → 1 → scale. What you’ll do Lead all things tech +...

  • Co-Founder

    4 days ago


    San Francisco, CA, United States Clera Full-time

    About the RoleThis is a founding-team opportunity at a pre-seed AI recruiting startup that is rethinking how top talent connects with high-growth companies. You will work directly alongside the existing co-founders to shape the product, go-to-market strategy, and culture from the ground up. The role carries real ownership and is central to the company's...


  • New York, NY, United States Subconscious AI Full-time

    Co-Founder, GTM + Strategic PartnershipsNew York City | Full time | In personAbout SubconsciousSubconscious is building the market simulator. We help companies test decisions about products, pricing, messaging, and go-to-market strategy before committing capital. Our approach uses causal experimentation on simulated markets, not generic synthetic-user...

  • Business Partner

    6 hours ago


    Chicago, United States Baquri Inc Full-time $50 - $60 Contract

    Location: Remote (Anywhere in the US)Engagement: Business Partner (Revenue % + Co-Founder Track) | Fixed Salary after Revenue Generation About Us We are a growing US Staffing firm looking to expand aggressively into new markets through VMS, MSP, and SOW models. To achieve this, we are seeking a highly experienced Sales Leader who can join us as a Business...


  • California, United States GreenSkai Ltd Part-time

    Co-Founder: Business Lead – USA Launch GreenSkai Sports The Opportunity Join us as Co-Founder and Business Lead to scale our sports technology platform. We've proven our model in 4 weeks and are moving fast. We need a strategic business partner to lead our USA market entry. Our Traction (Nov - Dec 2025) Nov 5: Private testing phase launchedNov 15:...


  • San Francisco, CA, United States FutureSight Ventures Full-time

    Job DescriptionJob DescriptionThe Opportunity FutureSight is seeking a Co-Founder & CEO to lead Closeline, an AI-native mortgage origination venture. This is a co-founder partnership with meaningful founder equity, not a salaried executive role.Closeline is building the AI-native infrastructure for mortgage origination, purpose-built for brokers and...

  • Growth Co-Founder

    3 days ago


    Northern, KY, United States Talantir Full-time

    Zigma Wave Limited is seeking a driven Chief Marketing Officer (CMO) / Growth Co-Founder to own marketing, sales, and market expansion. Lead generation, funnel optimization, and strategic partnerships drive revenue growth in a fast-paced startup.The role requires 4+ years in marketing/growth, a data-driven mindset, and the ability to operate like a...


  • Northern, KY, United States Talantir Full-time

    Job summaryZigma Wave Limited is seeking a driven Chief Marketing Officer (CMO) / Growth Co-Founder to take ownership of the company’s marketing, sales, and market expansion. The successful candidate will be responsible for building and executing strategies that generate qualified leads, strengthen market presence, and convert opportunities into...


  • new york, United States NxT Level Full-time

    Technical Co-Founder Location: Flexible / Venture-dependent Company Stage: Day-one venture-backed startup Focus: AI + Healthcare Employment Type: Co-Founder / Executive Leadership About Our Client Our client is building and launching new companies at the intersection of healthcare and AI. Each venture is built around deeply researched, conviction-driven...


  • Chicago, IL, United States EWOR Full-time

    A leading startup accelerator is seeking a Fintech Co-Founder / CTO to build a successful startup. The role offers extensive support from experienced founders and a network of over 50,000 professionals. Candidates should have an entrepreneurial mindset and excellent communication skills in English. This role is fully remote, allowing for flexibility in...


  • United States Montauk Capital, L.L.C. Full-time

    Cure is seeking a commercially exceptional CEO and co-founder to build the category-defining AI platform for recovery. This leader will take Cure from company formation through product-market validation and seed financing, defining market wedges and securing lighthouse partnerships with regulated enterprises. The role demands hands-on, high-velocity...


  • San Francisco, CA, United States Clera Full-time

    Clera, a pre-seed AI recruiting startup, is seeking a founding-team member to shape product, GTM strategy, and company culture from the ground up, working closely with co-founders.You will help build an AI-powered platform aligning candidates with startup hiring managers, drive growth, and hire early team across engineering, operations, and growth.Based in...


  • United States Cache Ventures, LLC. Full-time

    This is not a job for someone looking to manage a team. This is for someone who wants to build businesses . At Cache Ventures, we’re launching a Agency Services Platform to house a portfolio of cash flow producing agencies designed to compound, not lifestyle consultancies, not glorified freelancing, but real businesses with systems, teams, and...


  • Palo Alto, CA, Santa Clara County, CA; California, United States HIKINEX Full-time

    AI-Forward Executive Assistant to the Co-Founder & CEO (Remote and can travel to Palo Alto, couple of times a month) Join a profitable, fast-growing, AI-forward 130-person company headquartered in Palo Alto, California. You'll begin with full-scope executive support, then evolve the role by integrating AI tools and automationbuilding a scalable "human +...


  • World Trade Center, NY, United States 10x Value Partners GmbH Full-time

    10x Value Partners is the think tank and investment firm established by serial entrepreneur and investor Christian Schroeder. We focus on value investing across a number of asset classes with a focus on technology start-ups and impact investing. We have a strong focus on industry roll-ups with two successful roll-ups created by us and several roll-up...

  • Co-Founder

    1 week ago


    St Paul, MN, United States PilotLine.app Full-time

    5 days ago Be among the first 25 applicants Get AI-powered advice on this job and more exclusive features. Company Description PilotLine.app is a precision engineering software application that accelerates development through faster and fewer iterations by gathering real-time data to power predictive analytics and risk management. The application integrates...


  • New York City Metropolitan Area, United States Mission Staffing Full-time

    Confidential Executive Assistant to Co-Founders – Private Equity Firm – NYC4x in office$150k–$175k base + bonusThe RoleA highly confidential, growing private equity firm is seeking a polished and proactive Executive Assistant to support multiple Partners in its New York office.This is an exciting opportunity to join a entrepreneurial, and...

  • Co-Founder

    1 week ago


    Minneapolis, MN, United States PilotLine.app Full-time

    5 days ago Be among the first 25 applicants Get AI-powered advice on this job and more exclusive features. Company Description PilotLine.app is a precision engineering software application that accelerates development through faster and fewer iterations by gathering real-time data to power predictive analytics and risk management. The application integrates...


  • United States Silent Modz Full-time

    Silent Modz is seeking a hands-on CEO and ownership partner to expand an existing ecommerce gaming‑hardware business. You will lead daily operations, drive growth, and manage a small team while preserving founder alignment and brand integrity. You should have run a consumer‑products or ecommerce business, owned a P&L, and delivered measurable results....


  • Palo Alto, CA, United States EWOR Full-time

    A leading startup incubator is looking for an AI Co-Founder / CTO to join remotely and build a €1B+ company. The role includes owning and growing your startup with substantial support, including funding up to €500k, personal development crafted by experienced founders, and extensive hiring assistance. Ideal candidates have strong communication skills,...