Founding AI Engineer — Build AI Agents & Retrieval
Matterhaul Inc.
Matterhaul Inc. in San Francisco is seeking an early-career AI engineer to take ownership of AI systems and work collaboratively with senior engineers. Ideal candidates have a strong academic background in engineering and practical experience with AI systems in production. This role involves significant responsibilities, from improving agent surfaces to writing evaluation metrics and optimizing retrieval systems. The position offers career growth with mentorship opportunities. #J-18808-Ljbffr Matterhaul Inc.
- A cutting-edge recruiting tech company in San Francisco is seeking a Founding Engineer to own and build core systems in a fast-paced environment. You will ship full-stack code to production daily and collaborate with founders on architecture decisions. The ideal candidate...SuggestedRelocation
- Embedding VC is seeking a founding engineer to help build core products and systems. Work directly with the CEO and CTO as part of an experienced team. You will design AI systems, implement features, and enhance product usability. The ideal candidate has over 5 years of...SuggestedFlexible hours
- A dynamic AI recruitment service is seeking a Founding Engineer in San Francisco to build AI agents that revolutionize workflows for food manufacturers. The role offers a unique opportunity to work directly with industry leaders and earn 0.5%-2% equity. Ideal candidates...Suggested
$100k - $150k
Overview Pareto Agent - VC-backed AI startup building a policy-driven runtime for high-stakes commercial workflows. Founding AI Engineer — Agent Runtime role to build the execution layer for... ...management systems that determine how to retrieve, compress, and utilize data as...Suggested- United States Digital Space LLC is looking for a Founding Engineer to develop and manage a multi-agent AI system that replicates executive voice. This role involves full AI stack development, agent orchestration, and customer-facing features. Candidates should have at...Suggested
- David Joseph & Company is seeking a Founding AI/ML Engineer to join a cutting-edge seed-stage startup in San Francisco. This role involves... ...by processing large video, audio, and text datasets, building retrieval pipelines, and deploying secure distributed systems. You...
$180k - $280k
Rise 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 requires proficiency in TypeScript, React, Next.js, Node.js, and AWS. You...- A leading healthcare tech startup in San Francisco is seeking a founding engineer to build and scale AI infrastructure. The role involves collaborating with a skilled team to shape the company's product and culture. Candidates should have 1 to 10+ years of experience in...
$200k - $250k
A fast-growing AI company in San Francisco seeks a Founding Engineer to architect and build core systems that power precision outbound for startups. Ideal candidates have 1-6 years of experience, strong full-stack expertise especially in TypeScript, React, Next.js, and...$250k
Acceler8 Talent is hiring engineers in San Francisco for a rapidly growing AI startup focused on building and deploying production AI systems... ...The team is deploying multi-agent AI systems and large-scale... ...relevant experience including founding engineer roles or work in quantitative...- A VC-backed AI startup is seeking a Founding AI Engineer to design and implement a policy-driven runtime for autonomous sales agents in San Francisco. This role involves owning the multi-stage agent pipeline and building a robust runtime to enforce commercial policies....
- Guild.ai, Inc. is seeking a founding engineer in San Francisco to build production agents on their new AI platform. You will design, implement, and ship early agents that help developers manage complex systems. Responsibilities include owning workflows end-to-end and integrating...Flexible hours
- Jack & Jill is seeking a Founding AI/ML Engineer in San Francisco. The role involves building Generative Engine Optimization systems for AI search. Ideal candidates have strong NLP fundamentals and experience in production ML systems. You'll collaborate with world-class...
- TruNorth LTD is seeking a Founding Software Engineer to join its San Francisco team or London-based candidates willing to relocate in 2026. This role focuses on building enterprise-grade AI agents for Fortune 500 clientele. The ideal candidate will have a passion for early...Relocation
$160k - $220k
A leading AI company in San Francisco is seeking an experienced Founding Engineer to build core systems from the ground up. This hybrid role emphasizes real ownership and long-term impact within a cutting-edge team dedicated to innovative, autonomous software. The position...Visa sponsorship- ...About kos.ai Trillions of dollars are... ...Role You'll own the agent loop, the model orchestration... ...provider‑agnostic Build the evaluation... ..., prompting, and retrieval are second nature... .... He previously founded Spot AI, a... ...medalist, earned his Engineering PhD at Stanford, &...Visa sponsorshipWeekend work
- A leading AI startup in San Francisco seeks an AI Engineer to join their founding team. In this role, you will develop and optimize advanced AI models that support the logistics industry, which plays a critical role in the economy. The position requires hands-on experience...
$150k - $185k
Early-career founding AI role for a recent graduate or engineer with roughly two years of experience who has already... ...into senior ownership across agents, retrieval, evals, observability, and document... .... Full-time Matterhaul is building the AI-native operating system for...Full timeInternshipWork at office- ...in a dynamic environment that values creativity and independence, contributing to projects without traditional tech lead constraints. If you're ready to redefine the hiring process with us, join our mission to build something extraordinary. #J-18808-Ljbffr Finalroundai
- Harrison Clarke is seeking an experienced software engineer to join a venture-backed AI startup focused on building an AI-native B2B platform. The role involves designing product features, developing intelligent agents, and making impactful technical decisions collaboratively...
- kadence is seeking a Software Engineer in San Francisco to build AI-powered infrastructure for EMS agencies. This role involves full-stack development, engaging directly with users to improve workflows, and contributing to a startup at the ground floor. The ideal candidate...
- ...A leading AI technology firm in San Francisco is seeking an AI/Data Systems Engineer to build critical data pipelines that transform unstructured inputs into structured outputs. This role involves ensuring the accuracy and reliability of data that supports simulations...
- A cutting-edge AI company in San Francisco is seeking an experienced AI Engineer to build and optimize enterprise-grade AI agents. You will design and develop multimodal LLM architectures, work with AWS or GCP, and collaborate with diverse teams to enhance AI solutions...
- ...Francisco, is looking for experienced engineers to embed with customer teams and take AI into production. You will be... ...deployment, driving solutions and building integrations. The ideal candidate... ...role supports the development of agent infrastructure and requires robust...Remote job
$200k - $275k
TRM Labs is seeking an AI Engineer in San Francisco to build and implement agentic frameworks for AI applications. This role involves designing safe and observable systems that enhance decision-making for analysts. Candidates should have strong engineering experience, particularly...$125k - $200k
...Founding AI/ML Engineer Location: San Francisco, New York Employment Type: Full-time Experience Level... ...a seed‑stage startup (founded 2025) building technology that helps law enforcement... ...and applied ML: building retrieval pipelines, integrating LLMs/VLMs, and...Full timeVisa sponsorship- A leading AI platform company in San Francisco seeks a Forward Deployed Software Engineer to build AI agents that tackle complex tasks. The role emphasizes collaboration with Fortune 100 customers, integrating AI with real-world complexities, and enhancing productivity...
$100k - $250k
A pioneering AI software firm is seeking a Senior or Staff AI Context & Harness Engineer in San Francisco. This role involves building and maintaining AI coding agents, researching improved performance methods, and employing advanced context engineering techniques. Candidates...Work at officeRemote work$140k - $175k
Rippling is seeking a GTM Engineer in San Francisco to join their GTM Engineering team.... ...role entails designing and implementing AI-driven marketing solutions across... ...strong CS background, proven experience in building AI agents, and be business-savvy enough to understand...$200k - $300k
A dynamic AI startup in San Francisco seeks a Founding Forward Deployed Engineer to drive innovative solutions for CPG brands. You'll engage directly with customers to transform complex workflows into software, ship production-ready AI systems, and improve operational...
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