{"schemaVersion":"jobsearcher.job.v1","id":"198a3a064d50fc0b87fe0105","url":"https://jobsearcher.com/jobs/198a3a064d50fc0b87fe0105","canonicalUrl":"https://jobsearcher.com/jobs/198a3a064d50fc0b87fe0105","title":"Founding AI Engineer","description":"Founding AI Engineer\r\nSan Francisco | Engineering | In office | Full-time\r\nMason AI has cracked a research problem that went unsolved for over half a century: automatically checking blueprints for compliance with the building codes. The challenge is that over a hundred thousand pages of building codes and referenced standards govern blueprints, and this complexity bottlenecks construction in America.\r\nWe're looking for a Founding AI/ML Engineer to help us scale what works for residential projects in California to all construction across the country.\r\nYou will go deep on the cutting edge of optimizing multimodal AI agents; you will hillclimb on computer vision evals; and you will run time-boxed experiments that are high-risk, high-reward. You will become a domain expert on the ADA, Wildland-Urban Interfaces, and other wonky parts of the building code. Your work will directly affect the built environment of California within the first month of joining.\r\nYou will have a massive impact on the product, the company's future, and the country's, as we accelerate American construction. Join us.\r\nWho you are\r\nEither a cracked SWE passionate about growing as an ML/AI Engineer, or a cracked ML Engineer who's fast at prototyping.\r\nYou can run experiments quickly and develop an internal compass to estimate which hypotheses have the highest expected value to test.\r\nYou're mission-oriented and looking for your life's work. You care about America's ability to build.\r\nYou love ownership and don't mind ambiguity or unblocking yourself.\r\nYou have the curiosity of a policy wonk to digest building codes and architectural diagrams.\r\nWhat you'll do\r\n60+% of your time will be spent designing and executing experiments to improve AI agents – you'll build and test new tools, fine-tune models, optimize prompts, and more.\r\nTalk to users and dogfood the product weekly.\r\nWear hats as needed on topics ranging from running computer vision experiments, lightweight data engineering, building internal tooling, improving the webapp, and more.\r\nOur operating principles\r\nFail fast and cheap. Slugging percentage matters more than batting average.\r\nWe can make a lot of mistakes as long as we get a few things right.\r\nA written culture – we document our thinking on the few things that matter most.\r\nInternal tooling is a first-class use of time.\r\nIn-person work is a must.\r\nBenefits\r\nCompetitive salary ($120k-$200k).\r\nGenerous early-stage equity (0.5%-2%).\r\nFree lunch and dinner (after 7 pm) at the office.\r\nFully paid health insurance with over $1000/year in employer contributions to an HSA.\r\nA 401(k) that accepts pre-tax and Roth contributions.\r\nA commuter benefits account and a monthly wellness benefit.\r\nOpportunity to shape the future of our country.\r\nInterview process\r\nWe aim to make this happen in 2-3 weeks:\r\nInitial call (30 min) – Informal chat on your interests and experience.\r\nTake-home exercise (Week) – We'll give you a week to find building code violations in a floorplan. In so doing, you'll learn about the building codes and architectural diagrams, and gain a sense for how to automate this work.\r\nCoding Challenge (60 min) – Designed to mirror real work you'd do at Mason, you'll build a prototype for a slice of our product. AI coding tools are strongly encouraged.\r\nCultural fit interview (30 min) – Learn more about how you've navigated challenges in (or outside) of work.\r\nPaid work trial (3-5 days) – We'll set you up to run evals for our multimodal agent on our repo, and we'll ask you to generate hypotheses for experiments to run, run those experiments, and then analyze them. You'll be evaluated on your speed at running thoughtful experiments. We do reference calls in parallel.\r\nFull-time offer\r\nJ-18808-Ljbffr","company":"Clear Path","rawCompany":"clear path","city":"Millbrae","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-06-25T01:16:41.032Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"17-2199.00","title":"Engineers, All Other","slug":"engineers-all-other"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"}],"industries":[{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"541330","title":"Engineering Services","slug":"engineering-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Founding AI Engineer","description":"Founding AI Engineer\r\nSan Francisco | Engineering | In office | Full-time\r\nMason AI has cracked a research problem that went unsolved for over half a century: automatically checking blueprints for compliance with the building codes. The challenge is that over a hundred thousand pages of building codes and referenced standards govern blueprints, and this complexity bottlenecks construction in America.\r\nWe're looking for a Founding AI/ML Engineer to help us scale what works for residential projects in California to all construction across the country.\r\nYou will go deep on the cutting edge of optimizing multimodal AI agents; you will hillclimb on computer vision evals; and you will run time-boxed experiments that are high-risk, high-reward. You will become a domain expert on the ADA, Wildland-Urban Interfaces, and other wonky parts of the building code. Your work will directly affect the built environment of California within the first month of joining.\r\nYou will have a massive impact on the product, the company's future, and the country's, as we accelerate American construction. Join us.\r\nWho you are\r\nEither a cracked SWE passionate about growing as an ML/AI Engineer, or a cracked ML Engineer who's fast at prototyping.\r\nYou can run experiments quickly and develop an internal compass to estimate which hypotheses have the highest expected value to test.\r\nYou're mission-oriented and looking for your life's work. You care about America's ability to build.\r\nYou love ownership and don't mind ambiguity or unblocking yourself.\r\nYou have the curiosity of a policy wonk to digest building codes and architectural diagrams.\r\nWhat you'll do\r\n60+% of your time will be spent designing and executing experiments to improve AI agents – you'll build and test new tools, fine-tune models, optimize prompts, and more.\r\nTalk to users and dogfood the product weekly.\r\nWear hats as needed on topics ranging from running computer vision experiments, lightweight data engineering, building internal tooling, improving the webapp, and more.\r\nOur operating principles\r\nFail fast and cheap. Slugging percentage matters more than batting average.\r\nWe can make a lot of mistakes as long as we get a few things right.\r\nA written culture – we document our thinking on the few things that matter most.\r\nInternal tooling is a first-class use of time.\r\nIn-person work is a must.\r\nBenefits\r\nCompetitive salary ($120k-$200k).\r\nGenerous early-stage equity (0.5%-2%).\r\nFree lunch and dinner (after 7 pm) at the office.\r\nFully paid health insurance with over $1000/year in employer contributions to an HSA.\r\nA 401(k) that accepts pre-tax and Roth contributions.\r\nA commuter benefits account and a monthly wellness benefit.\r\nOpportunity to shape the future of our country.\r\nInterview process\r\nWe aim to make this happen in 2-3 weeks:\r\nInitial call (30 min) – Informal chat on your interests and experience.\r\nTake-home exercise (Week) – We'll give you a week to find building code violations in a floorplan. In so doing, you'll learn about the building codes and architectural diagrams, and gain a sense for how to automate this work.\r\nCoding Challenge (60 min) – Designed to mirror real work you'd do at Mason, you'll build a prototype for a slice of our product. AI coding tools are strongly encouraged.\r\nCultural fit interview (30 min) – Learn more about how you've navigated challenges in (or outside) of work.\r\nPaid work trial (3-5 days) – We'll set you up to run evals for our multimodal agent on our repo, and we'll ask you to generate hypotheses for experiments to run, run those experiments, and then analyze them. You'll be evaluated on your speed at running thoughtful experiments. We do reference calls in parallel.\r\nFull-time offer\r\nJ-18808-Ljbffr","datePosted":"2026-06-25T01:16:41.032Z","dateModified":"2026-06-25T01:16:41.032Z","hiringOrganization":{"@type":"Organization","name":"Clear Path","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Millbrae","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"198a3a064d50fc0b87fe0105"},"url":"https://jobsearcher.com/jobs/198a3a064d50fc0b87fe0105"}}