Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Founding Engineer: Build AI Agent Infra (Equity)

Jack & Jill

General Catalyst-backed startup seeks a Founding Engineer to build core primitives enabling AI agents to communicate and operate autonomously. You will design high-throughput email infrastructure and low-latency APIs bridging AI capabilities with foundational messaging protocols. You will own projects end-to-end for a rapidly scaling user base, shaping infrastructure and tooling in a fast-paced environment with a hands-on, problem-solving approach. #J-18808-Ljbffr Jack & Jill

Vacancy posted 2 days ago
Similar jobs that could be interesting for youBased on the Founding Engineer: Build AI Agent Infra (Equity) in San Francisco, CA vacancy
  • TruNorth LTD is seeking a Founding Software Engineer to join its San Francisco team or London...  ...relocate in 2026. This role focuses on building enterprise-grade AI agents for Fortune 500 clientele. The...  ...development. You will enjoy equity and a genuine ownership role in shaping... 
    Employment Equity
    Relocation

    TruNorth LTD

    San Francisco, CA
    4 days ago
  • Arcadia is seeking three Founding Software Engineers in San Francisco to build and scale infrastructure for autonomous AI agents in the hospitality sector. This role is ideal for candidates...  ...work culture with significant equity and ownership. #J-18808-Ljbffr Arcadia
    Employment Equity

    Arcadia

    San Francisco, CA
    2 days ago
  • A pioneering AI infrastructure company in San Francisco is seeking a Founding Engineer to shape its product and engineering...  .... You will work on building scalable backend...  ...particularly with AI agents and distributed systems...  ...salary and equity. #J-18808-Ljbffr Caylex
    Employment Equity

    Caylex

    San Francisco, CA
    2 days ago
  • $150k - $250k

     ...Description Venture-backed startup building the decision intelligence...  ...is building a new class of AI systems that combine agentic...  ...and industrial companies. As a Founding Engineer, you'll work across backend...  ...large-scale industrial data, agent-based reasoning, optimization... 
    Employment Equity
    Work at office
    Immediate start
    Visa sponsorship
    Relocation package

    CoffeeSpace

    San Francisco, CA
    2 days ago
  • $150k - $300k

     ...Recruitment is partnering with a well-funded AI startup seeking a Founding Engineer in San Francisco. This role involves building core infrastructure and making critical...  ...ranges from $150k to $300k base, alongside equity options, and offers visa sponsorship for exceptional... 
    Employment Equity
    Visa sponsorship

    Alpha Associates Recruitment

    San Francisco, CA
    4 days ago
  •  ...Markets (YC P26) is looking for a strong engineer to build and maintain trading infrastructure in...  ...ownership, speed, and innovative use of AI in development processes. You will work...  ...values small teams and high accountability. Equity, health insurance, and unlimited PTO are... 
    Employment Equity
    Work at office
    Local area

    River Markets (YC P26)

    San Francisco, CA
    3 days ago
  • A dynamic tech company in San Francisco is seeking a founding engineer to own significant parts of their core platform. The ideal candidate...  ...and work in a fast-paced, high-impact environment. Competitive equity and a chance to be part of the founding team are included. #J... 
    Employment Equity

    Terac

    San Francisco, CA
    2 days ago
  • $150k - $220k

    Optimized builds AI agents that run inside the most critical supply chains in the world, from...  ...the decisions it makes, and we need a founding engineer to own that intelligence. As a Founding...  ...this role is $150,000 - $220,000 + equity. What you'll do Own how agents reason... 
    Employment Equity

    Optimized, Inc.

    San Francisco, CA
    3 days ago
  • davidjoseph-co is seeking a Founding AI/ML Engineer in San Francisco. This role involves shaping the AI infrastructure of a fast-growing startup...  ...environments. The role offers competitive salary, meaningful equity, and unlimited PTO. #J-18808-Ljbffr davidjoseph-co
    Employment Equity

    davidjoseph-co

    San Francisco, CA
    2 days ago
  • $180k - $280k

     ...Technical Recruitment Limited is seeking a Founding Senior Software Engineer in San Francisco, CA. As one of the first engineers, you will develop AI agents and features from scratch. The role...  ...- $280,000 per annum plus benefits, equity, and the chance to work on impactful... 
    Employment Equity

    Rise Technical Recruitment Limited

    San Francisco, CA
    2 days ago
  • Arcadia is looking for a Senior Software Engineer (AI Agents) in San Francisco. In this pivotal role, you will build core systems for an intelligent automation platform...  ...grade LLM systems, collaborating closely with the founding team, and making crucial architectural... 
    Employment Equity

    Arcadia

    San Francisco, CA
    2 days ago
  •  ...innovative biotech firm in San Francisco is seeking a Founding Bioinformatics Engineer to build and maintain bioinformatics pipelines. The role requires...  ...integral in the development processes. Competitive salary, equity, and benefits, including unlimited PTO, are offered,... 
    Employment Equity

    Novaflow (YC S25)

    San Francisco, CA
    2 days ago
  • An early-stage AI startup in San Francisco is seeking a Founding Engineer to help architect and build their platform from scratch. This role offers a unique opportunity for real...  ...and responsibility, including founder-level equity. Ideal candidates should be experienced full... 
    Employment Equity

    XUMAN.AI

    San Francisco, CA
    17 hours ago
  • $170k - $350k

    Job Title Founding Engineer Salary $170k-$350k + Equity Company Description well-funded AI infrastructure startup Job Description You will build the simulation and evaluation infrastructure that powers...  ...the training of frontier AI agents. By developing containerized... 
    Employment Equity

    Jack & Jill

    San Francisco, CA
    2 days ago
  •  ...is to make intelligent agents ubiquitous. We build the foundation for agent engineering in the real world, helping...  ...to production‑ready AI agents that teams can rely...  ...solutions engineering, founding/product engineering),...  ...roles, meaningful equity, benefits, and perks. Actual... 
    Employment Equity
    Work at office
    Flexible hours

    LangChain

    San Francisco, CA
    2 days ago
  • $250k

    Acceler8 Talent is hiring engineers in San Francisco for a rapidly growing AI startup focused on building and deploying...  ...team is deploying multi-agent AI systems and large-...  ...experience including founding engineer roles or work...  ...up to $250k plus equity. #J-18808-Ljbffr Acceler... 
    Employment Equity

    Acceler8 Talent

    San Francisco, CA
    3 days ago
  •  ...Francisco is seeking a full-stack engineer operating at a CTO level to own large...  .... You'll work at the frontier of AI, building and improving agentic systems, and...  ...will ensure your rapid growth. This founding role offers generous equity along with an unlimited AI budget,... 
    Employment Equity

    DataLeap

    San Francisco, CA
    5 days ago
  • About Shiplight AI At Shiplight AI, our mission is to build the foundation for enterprise...  ...by intelligent agents. We believe every...  ...their own AI QA engineer that validates work...  ...small, mission-driven founding team led by...  ...Receive generous equity and play a defining... 
    Employment Equity

    Gravity Engineering Services Pvt Ltd.

    San Francisco, CA
    2 days ago
  • $150k - $230k

    Triage is seeking a Founding Research Engineer in San Francisco to drive research for AI safety. You'll handle adversarial research, build training data infrastructure, and work on delivering...  ...competitive salary of $150K-$230K plus equity, this is an exciting opportunity to... 
    Employment Equity

    Triage

    San Francisco, CA
    2 days ago
  • $200k

    Job Title Founding Engineer - Full Stack Salary $200k+ + Equity Company Description VC-backed pre-construction AI startup funded by top-tier investors in PlanGrid and BuildingConnected...  ...will own the platform end-to-end, building AI agents that transform weeks of manual bid... 
    Employment Equity
    For contractors

    Jack & Jill

    San Francisco, CA
    2 days ago
  • $130k - $250k

     ...Job Description Founding Engineer — AI-Native Mental Health...  ...0 base + 0.20%–0.80% equity Visa Sponsorship:...  ...A YC-backed startup building AI-native mental health...  ...own core product and agent systems end-to-end —...  ...system. This is not "just infra": it's the product heart... 
    Employment Equity
    Full time
    Immediate start
    Remote work
    Relocation
    Flexible hours

    David Joseph & Company

    San Francisco, CA
    28 days ago
  • $120k - $200k

    Red Cedar Ventures seeks a Founding Engineer to build the core intelligence behind AutoSitu’s review agents. This role offers a unique opportunity to shape product direction...  ...compensation package of $120K to $200K plus equity. #J-18808-Ljbffr Red Cedar Ventures
    Employment Equity

    Red Cedar Ventures

    San Francisco, CA
    4 days ago
  • $180k - $225k

     ...Description Job Description Founding Engineer — Confidential (AI Startup, YC/a16z-Backed)...  ...225,000 base + 1.0% – 1.5% equity Visa Sponsorship:...  ...A well-funded AI startup building a new paradigm for software creation — using AI agents to autonomously create and... 
    Employment Equity
    Full time
    Relocation
    Visa sponsorship
    Relocation package
    Flexible hours

    David Joseph & Company

    San Francisco, CA
    5 days ago
  • Jack & Jill is seeking a Founding Engineer to join a founding team building AI-driven construction tools in San Francisco. You will own the platform end-to-end...  ..., shaping the architecture from day one in a fast-moving, equity-backed startup. #J-18808-Ljbffr Jack & Jill
    Employment Equity

    Jack & Jill

    San Francisco, CA
    2 days ago
  • A cybersecurity technology company in San Francisco seeks an Agent Engineer to design, build, and deploy mission-critical AI agents. You will work directly with customers to adapt our platform and solve complex challenges, owning projects end-to-end. Ideal candidates will... 

    Cogent Security

    San Francisco, CA
    5 days ago
  • Firebender in San Francisco is looking for a dedicated engineer to build innovative coding agents and manage infrastructure to enhance coding productivity....  ...a collaborative environment, aiming to support a vast array of engineers leveraging AI. #J-18808-Ljbffr Firebender

    Firebender

    San Francisco, CA
    1 day ago
  •  ...Co. is an applied AI startup co-founded by Jared Kushner...  ...Karpathy. We are building AI applications for...  ...As our Security Engineer, Infrastructure,...  ...shoulder with our infra team as a true...  ...environment, where agents write code and operate...  ...and meaningful equity in a high-growth... 
    Employment Equity
    Worldwide

    BrainCo

    San Francisco, CA
    2 days ago
  • Cascade, based in San Francisco, is seeking a Founding Engineer to build the core platform used by the world's leading architects and builders. You...  ...translate customer needs into robust software, with a focus on AI-driven orchestration for complex physical industries and... 

    Jack & Jill

    San Francisco, CA
    3 days ago
  • Dormont Manufacturing Co is seeking a Founding Recruiter to build and scale their talent engine. This role involves owning the...  ...full-cycle recruiting, particularly in AI or deep tech startups. The position offers competitive equity, benefits, and an opportunity to shape... 
    Employment Equity

    Dormont Manufacturing Co

    San Francisco, CA
    4 days ago
  • $250k - $400k

    A tech communication company is seeking a Senior Infrastructure Engineer to build identity and communication infrastructure for AI agents. This role will involve designing intuitive APIs, architecting high-throughput systems, and leading a team of engineers. Candidates... 
    Employment Equity

    AgentMail (YC S25)

    San Francisco, CA
    2 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Founding Engineer: Build AI Agent Infra (Equity). Be the first to apply!