{"id":197254,"date":"2026-03-02T19:43:32","date_gmt":"2026-03-02T19:43:32","guid":{"rendered":"https:\/\/www.harnham.com\/job\/eb8cdd1a-d1d1-4f13-3bd8-08d5dc096ea6-lead-ai-engineer-san-francisco-california-2\/"},"modified":"2026-03-09T23:05:37","modified_gmt":"2026-03-09T23:05:37","slug":"eb8cdd1a-d1d1-4f13-3bd8-08d5dc096ea6-lead-ai-engineer-san-francisco-california-2","status":"publish","type":"job_listing","link":"https:\/\/www.harnham.com\/job\/eb8cdd1a-d1d1-4f13-3bd8-08d5dc096ea6-lead-ai-engineer-san-francisco-california-2\/","title":{"rendered":"Lead AI Engineer"},"content":{"rendered":"<h4><strong><a id=\"myCustomID\" href=\"https:\/\/www.harnham.com\/job\/EB8CDD1A-D1D1-4F13-3BD8-08D5DC096EA6\">To Apply for this Job Click Here<\/a><\/strong><\/h4>\n<p><strong>Lead AI Engineer $250-300k + Equity &#8211;<\/strong> <strong>San Francisco Bay Area | Hybrid<\/strong><\/p>\n<p><strong>Early-Stage Startup &#8211; Full-Time &#8211; AI Engineering<\/strong><\/p>\n<p>Join a fast-growing early\u2011stage startup building a next\u2011generation, AI\u2011native design\u2011to\u2011code platform. The team is creating a new category of design tooling where code renders directly as design, real-time AI is deeply embedded into the workflow, and designers work directly in the medium that ships to production.<\/p>\n<p>We are now hiring a <strong>Lead AI Engineer<\/strong> as the first dedicated AI specialist on the team-owning the model layer, driving fine\u2011tuning strategy, and building custom SLMs that power a highly interactive, high\u2011performance product.<\/p>\n<p><strong>The Role<\/strong><\/p>\n<p>As the <strong>Lead AI Engineer<\/strong>, you&#8217;ll take end\u2011to\u2011end ownership of model development, optimization, deployment, and evaluation. This is a hands-on, production-focused role where you will build and maintain the AI systems at the core of the product experience.<\/p>\n<p>You&#8217;ll work at the intersection of models, systems, and product-shipping production-grade AI features, shaping technical direction, and establishing best practices for evaluation and performance.<\/p>\n<p><strong>What You&#8217;ll Do<\/strong><\/p>\n<p><strong>Model Fine\u2011Tuning &amp; Specialization<\/strong><\/p>\n<ul>\n<li>Lead fine\u2011tuning efforts across LoRA, adapters, distillation, and full fine\u2011tuning<\/li>\n<li>Decide when fine\u2011tuning, prompting, or system\u2011level approaches are most appropriate<\/li>\n<li>Iterate models based on real product signals and user feedback<\/li>\n<li>Balance quality, latency, reliability, and cost<\/li>\n<\/ul>\n<p><strong>Model Optimization &amp; Performance<\/strong><\/p>\n<ul>\n<li>Optimize inference speed, throughput, and per\u2011request cost<\/li>\n<li>Improve model determinism, consistency, and real-time responsiveness<\/li>\n<li>Define and maintain benchmarking, evaluation, and observability frameworks<\/li>\n<\/ul>\n<p><strong>Custom SLM Development<\/strong><\/p>\n<ul>\n<li>Build small, fast language models tailored for design and code-generation workflows<\/li>\n<li>Identify use cases where SLMs outperform larger models<\/li>\n<li>Maintain and evolve SLMs in production environments<\/li>\n<\/ul>\n<p><strong>What You&#8217;ll Build<\/strong><\/p>\n<ul>\n<li>Fine\u2011tuned models for design-to-code generation<\/li>\n<li>Custom SLMs for narrow, high\u2011precision workflows<\/li>\n<li>Real-time, streaming AI features inside a design environment<\/li>\n<li>Multi-step agentic systems supporting &#8220;prompt-as-cursor&#8221; and next\u2011in\u2011flow interactions<\/li>\n<\/ul>\n<p><strong>How You&#8217;ll Work<\/strong><\/p>\n<ul>\n<li>~80% hands\u2011on coding, 20% systems-level strategy<\/li>\n<li>Full lifecycle ownership: scoping \u2192 experimentation \u2192 deployment \u2192 monitoring \u2192 iteration<\/li>\n<li>Close collaboration with engineering and product leadership<\/li>\n<li>Operate within a highly senior, fast-moving engineering team<\/li>\n<li>Ideal for builders coming from AI\u2011native, high\u2011velocity environments<\/li>\n<\/ul>\n<p><strong>What We&#8217;re Looking For<\/strong><\/p>\n<p><strong>Must-Have Experience<\/strong><\/p>\n<ul>\n<li>5+ years software engineering<\/li>\n<li>2+ years hands\u2011on work with LLMs in production<\/li>\n<li>Proven fine\u2011tuning experience (LoRA, distillation, adapters, full fine\u2011tuning)<\/li>\n<li>Strong Python and TypeScript\/Node.js skills<\/li>\n<li>Experience deploying custom models end\u2011to\u2011end<\/li>\n<li>Understanding of inference optimization and performance tradeoffs<\/li>\n<li>Experience with model evaluation and benchmarking<\/li>\n<\/ul>\n<p><strong>Nice-to-Haves<\/strong><\/p>\n<ul>\n<li>ONNX Runtime<\/li>\n<li>Redis<\/li>\n<li>WebSockets<\/li>\n<li>LangChain or similar orchestration tools<\/li>\n<li>Model optimization and compression techniques<\/li>\n<li>LLM observability tooling<\/li>\n<\/ul>\n<p><strong>Ideal Background<\/strong><\/p>\n<ul>\n<li>Experience in AI-native product startups (Seed \u2192 Series B\/C)<\/li>\n<li>Work in code generation, developer tools, design tooling, or AI automation<\/li>\n<li>Strong applied experience shipping models to production at speed<\/li>\n<\/ul>\n<p><strong>How to Apply<\/strong><\/p>\n<p>If this role aligns with your experience and interests, please reach out with your Resume or LinkedIn profile. I would welcome a confidential conversation to explore whether it&#8217;s the right fit.<\/p>\n<p><strong>Lead AI Engineer $250-300k + Equity &#8211;<\/strong> <strong>San Francisco Bay Area | Hybrid<\/strong><\/p>\n<p><strong>Early-Stage Startup &#8211; Full-Time &#8211; AI Engineering<\/strong><\/p>\n<p><img src=https:\/\/counter.adcourier.com\/RGFuaWVsU3RvY2t3ZWxsLjU1NTk5LjEzMTk3QGhhcm5oYW1zZWFyY2guYXBsaXRyYWsuY29t.gif><\/p>\n<h4><strong><a id=\"otherId\" href=\"https:\/\/www.harnham.com\/job\/EB8CDD1A-D1D1-4F13-3BD8-08D5DC096EA6\">To Apply for this Job Click Here<\/a><\/strong><\/h4>\n","protected":false},"author":0,"featured_media":0,"template":"","meta":{"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","inline_featured_image":false,"_promoted":"","_job_location":"San Francisco, California","_application":"","_company_name":"Harnham","_company_website":"https:\/\/www.harnham.com\/","_company_tagline":"","_company_twitter":"","_company_video":"","_filled":0,"_featured":0,"_remote_position":0,"_job_salary":"","_job_salary_currency":"","_job_salary_unit":""},"job-categories":[921],"job-types":[60],"class_list":{"0":"post-197254","1":"job_listing","2":"type-job_listing","3":"status-publish","4":"hentry","6":"job-type-permanent"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Lead AI Engineer San Francisco, California<\/title>\n<meta name=\"description\" content=\"Lead AI Engineer San Francisco, California\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.harnham.com\/job\/eb8cdd1a-d1d1-4f13-3bd8-08d5dc096ea6-lead-ai-engineer-san-francisco-california-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lead AI Engineer San Francisco, California\" \/>\n<meta property=\"og:description\" content=\"Lead AI Engineer San Francisco, California\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.harnham.com\/job\/eb8cdd1a-d1d1-4f13-3bd8-08d5dc096ea6-lead-ai-engineer-san-francisco-california-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Harnham\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-09T23:05:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.harnham.com\/wp-content\/uploads\/2025\/02\/Harnham.gif\" \/>\n\t<meta property=\"og:image:width\" content=\"200\" \/>\n\t<meta property=\"og:image:height\" content=\"200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Lead AI Engineer San Francisco, California\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Lead AI Engineer San Francisco, California","description":"Lead AI Engineer San Francisco, California","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.harnham.com\/job\/eb8cdd1a-d1d1-4f13-3bd8-08d5dc096ea6-lead-ai-engineer-san-francisco-california-2\/","og_locale":"en_US","og_type":"article","og_title":"Lead AI Engineer San Francisco, California","og_description":"Lead AI Engineer San Francisco, California","og_url":"https:\/\/www.harnham.com\/job\/eb8cdd1a-d1d1-4f13-3bd8-08d5dc096ea6-lead-ai-engineer-san-francisco-california-2\/","og_site_name":"Harnham","article_modified_time":"2026-03-09T23:05:37+00:00","og_image":[{"width":200,"height":200,"url":"https:\/\/www.harnham.com\/wp-content\/uploads\/2025\/02\/Harnham.gif","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_title":"Lead AI Engineer San Francisco, California","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.harnham.com\/job\/eb8cdd1a-d1d1-4f13-3bd8-08d5dc096ea6-lead-ai-engineer-san-francisco-california-2\/","url":"https:\/\/www.harnham.com\/job\/eb8cdd1a-d1d1-4f13-3bd8-08d5dc096ea6-lead-ai-engineer-san-francisco-california-2\/","name":"Lead AI Engineer San Francisco, California","isPartOf":{"@id":"https:\/\/www.harnham.com\/#website"},"datePublished":"2026-03-02T19:43:32+00:00","dateModified":"2026-03-09T23:05:37+00:00","description":"Lead AI Engineer San Francisco, California","breadcrumb":{"@id":"https:\/\/www.harnham.com\/job\/eb8cdd1a-d1d1-4f13-3bd8-08d5dc096ea6-lead-ai-engineer-san-francisco-california-2\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.harnham.com\/job\/eb8cdd1a-d1d1-4f13-3bd8-08d5dc096ea6-lead-ai-engineer-san-francisco-california-2\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.harnham.com\/job\/eb8cdd1a-d1d1-4f13-3bd8-08d5dc096ea6-lead-ai-engineer-san-francisco-california-2\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.harnham.com\/"},{"@type":"ListItem","position":2,"name":"Lead AI Engineer"}]},{"@type":"WebSite","@id":"https:\/\/www.harnham.com\/#website","url":"https:\/\/www.harnham.com\/","name":"Harnham","description":"","publisher":{"@id":"https:\/\/www.harnham.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.harnham.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.harnham.com\/#organization","name":"Harnham","url":"https:\/\/www.harnham.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.harnham.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.harnham.com\/wp-content\/uploads\/2023\/04\/harnham-squarelogo-1522068491765.png","contentUrl":"https:\/\/www.harnham.com\/wp-content\/uploads\/2023\/04\/harnham-squarelogo-1522068491765.png","width":200,"height":200,"caption":"Harnham"},"image":{"@id":"https:\/\/www.harnham.com\/#\/schema\/logo\/image\/"}}]}},"_links":{"self":[{"href":"https:\/\/www.harnham.com\/wp-json\/wp\/v2\/job-listings\/197254","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.harnham.com\/wp-json\/wp\/v2\/job-listings"}],"about":[{"href":"https:\/\/www.harnham.com\/wp-json\/wp\/v2\/types\/job_listing"}],"wp:attachment":[{"href":"https:\/\/www.harnham.com\/wp-json\/wp\/v2\/media?parent=197254"}],"wp:term":[{"taxonomy":"job_listing_category","embeddable":true,"href":"https:\/\/www.harnham.com\/wp-json\/wp\/v2\/job-categories?post=197254"},{"taxonomy":"job_listing_type","embeddable":true,"href":"https:\/\/www.harnham.com\/wp-json\/wp\/v2\/job-types?post=197254"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}