Founding CTO for AI/LLM Platform - SF On-site
Job Juncture
A fast-growing tech startup in San Francisco seeks a Founding CTO who will be hands-on in building core architecture and assembling a top-tier engineering team. The ideal candidate brings over 5 years of engineering experience, particularly in backend and infrastructure. Responsibilities include owning the technical vision, leading product decisions, and mentoring engineers. This position favors candidates who thrive in dynamic environments and are passionate about AI. Competitive benefits include health insurance and a gym stipend. #J-18808-Ljbffr Job Juncture
- ...Founding CTO Salary: Confidential Location: SAN FRANCISCO... ...: San Francisco, CA (on-site) Employment: Full-Time... ...the engineering team in SF. This is not a VP Engineering... ...systems in the world. AI finally makes it... ...backend, infra, data, and LLM-powered systems Ship...WebsiteFull timeWork at officeRelocationRelocation package
- ...Description Early ownership + equity. Build AI agents that replace legacy ERPs for real... ...PostgreSQL pgvector LangChain LangGraph RAG LLM orchestration Pinecone Docker Terraform CI... ...and mid‑market operators. Our platform connects order capture, inventory, purchasing...PlatformWebsiteWork experience placementRemote work
- A fast-growing, pre-seed AI startup in the talent and recruiting space is looking for a Founding Engineer Intern to join their founding... ...You'll work directly with the CTO to ship features daily and help... ...Based in San Francisco, CA . On-site role with hacker-house periods...PlatformWebsiteInternshipVisa sponsorship
- ...About Simple Simple AI is building state of the... ...looking to hire a couple founding software engineers to help... ..., and work out of our SF based office 5 days a... ...’s co-founder matching site. Cat previously worked... ...engineering or working with AI/LLM-based platforms. Experience as an early...PlatformWebsiteWork experience placementWork at office
$80k - $100k
...Our client is a YC-backed AI startup operating at the intersection... ...they are a small, fast-moving founding team targeting one of the most... ...people who keep construction sites running, farms operating, and... ...fleet utilization. The platform plugs directly into a dealer's...PlatformWebsiteRelocation$175k - $275k
Carma is hiring a Founding Full‑Stack Engineer to own product surfaces... ..., DOT compliance Develop AI agent workflows that automate... ...environment with 6 days/week on‑site in SF Compensation & Conditions $... ...vehicles on Carma's platform in production today. When a truck...PlatformWebsiteDay shift- Founding Engineer | Build AI Products That Solve Mission-Critical Problems A client... ...development across the core platform, building scalable features... ..., Kubernetes, and modern LLM tooling. This role goes beyond... .... This is a full-time, on-site position based in Downtown...PlatformWebsiteFull timeWork at office
$150k - $200k
Lane — Founding Full-Stack Engineer Type: Full-time | On-site | San Francisco, CA (North Beach) Compensation... ...into action by giving AI agents a dependable way to... ...Engineer to build the platform end‑to‑end, with particular... ...opinionated, generative thinker SF North Beach, 5 days in‑...PlatformWebsiteFull timeH1bWork at officeVisa sponsorship$175k - $225k
Founding Full-Stack Software Engineer (React / Node.js / NestJS / PostgreSQL... ...We’re building an AI-native platform that transforms fleet operations... ...work. Why In‑Person in SF Matters You’ll work shoulder... ...team dinners, events, and off‑sites. The opportunity to transform...PlatformWebsiteFull timeWork at officeRemote work- ...class group redefining how AI works. We move fast,... ...available at TypeSafe. Founding Product Designer Location... ...Full time Location Type On-site Department Design... ...quietly rethinking the LLM stack from first principles... ...end UX for our developer platform , with a focus on improving...PlatformWebsiteFull timeWork at officeShift work
- We're building the AI workforce for the physical economy — an agent platform that automates the work ops teams... ...Obaid Khan previously founded Motive (valued $5B+), so... ...time Location Type On-site Department Design We're... ...customers. In-person in SF. #J-18808-Ljbffr Runbook...PlatformWebsiteFull time
$150k - $230k
...alignment infrastructure for AI systems: defending... ...the Role We're hiring a Founding Research Engineer to drive... ...a fit if You’ve done LLM post‑training work: RLHF... ...coordinated disclosure that platform teams take seriously and... ..., we’ll arrange an on‑site where you’ll work on a...PlatformWebsiteFull time- ...user experience of our AI-powered platform. You'll work on... ...move fast, and we need a founding designer who can immerse... ...visual needs: marketing site sections, sales one-... ...the CEO (product) and CTO (engineering) to ship... ...comfortable designing for AI/LLM-powered experiences (...PlatformWebsiteFull timeWork at officeFlexible hours
$300k
Founding AE | $300K+ OTE | Elite Fintech Backed by Tier 1 VCs | In-Person SF job at Bundoran Group. San Francisco, CA. Confidential Job... ...a high-growth financial platform already used by hundreds of startups... ...with early-stage upside On-site team at Fort Mason HQ (gym,...PlatformWebsiteLocal areaRemote workRelocation$150k - $250k
As our Founding Security Reliability Engineer at Charta Health, you'll pioneer the application of Site Reliability Engineering principles to ensure... ...our cutting‑edge generative AI platform. This is a unique... ...person work culture at our SF Headquarters. $150,000 -...PlatformWebsite- Mage Legal is seeking a frontend engineer to build interfaces for its AI-native platform in San Francisco. This founding engineering role involves making architectural decisions and enhancing user interactions. The ideal candidate will have a solid background in TypeScript...PlatformWork at office
$150k - $210k
...complex diseases. Our data platform is used by drug... ...solutions in bioinformatics, AI, and drug development. We... ...Role We’re looking for our Founding Data Engineer who’s... ...will require working on‑site 3 days a week (Tuesday,... ...friendly office in Downtown SF near transit A “work...PlatformWebsiteWork experience placementWork at officeRelocationFlexible hours3 days per week$150k - $250k
Clera, a Y Combinator-backed AI startup in San Francisco, is looking for a Founding Engineer - Full Stack. This role offers a unique opportunity to shape engineering culture and practices while working on cutting-edge AI tools. Ideal candidates should have at least 1 year...Website- About Hyperscale Founding Sales Engineer (SF In-Person Preferred) About Hyperscale... ...Hyperscale is building the AI-native intelligence layer for... ...designing POCs, traveling on-site to customer locations, and... ...ETL pipelines, or middleware platforms Startup experience or comfort...PlatformWebsiteImmediate startFlexible hours
- A leading healthcare AI company based in San Francisco is seeking an elite mobile and full-stack engineer to shape the future of an innovative biofeedback therapy platform. The ideal candidate has strong experience in React Native, startup environments, and a passion for...Platform
$150k - $250k
A seed-stage AI startup in San Francisco is looking for a Founding Software Engineer to build high-quality frontend features. This role involves collaborating with designers and backend engineers while taking ownership of frontend architecture. The ideal candidate should...Platform- Stealth Startup is seeking a founding full-stack engineer for an in-person role in San Francisco, CA. You will build AI-powered products, design full-stack features, and work... .... As an early hire, you’ll help scale the platform, own significant components, and receive meaningful...PlatformVisa sponsorship
$300k
Get AI-powered advice on this job and more exclusive features. Equity: 3%-15% (valued... ...an AI-powered mobile biofeedback therapy platform already used by clinicians at top U.S. health... ...focus) Previous experience as Founder or CTO at a venture-backed startup Experience...Platform- Weekdayworks in San Francisco on-site is looking for an early hire / founding engineer to build the core product from the ground up. You’ll own major surfaces... ...help establish engineering best practices while moving fast with modern AI tooling. #J-18808-Ljbffr WeekdayworksWebsite
- ...San Francisco, CA. The role offers a unique opportunity in a rapidly growing company focused on AI for enterprise supply chains. Candidates will work closely with the founding team and participate in strategic decision-making while enjoying a competitive compensation...Website
- ...Hangar in San Francisco seeks a Founding Performance Engineer to own the systems that make AI video pipelines fast and reliable... ...hires, you’ll work on-site in San Francisco, shaping the technical... ...speed, efficiency, and scale for our platform. #J-18808-Ljbffr Hire HangarPlatformWebsite
- Runbook Inc. in San Francisco is seeking a Founding Designer to define and own the design language for their AI platform. This role is pivotal in shaping both the product... ...high standards of design quality. This is an on-site position as part of a dynamic team with direct...PlatformWebsite
$180k - $230k
...SaaS startup in the AI-powered sales automation... ...is hiring its first Founding Engineer. You'll join the CTO as a core member of a... ...the full stack, from LLM orchestration to... ...screen sizes. The Platform: Customer-facing tooling... ...This role is fully on-site in San Francisco, CA...PlatformWebsiteRemote work$150k - $200k
...intent into action by giving AI agents a dependable way... ...they conduct. Founded in 2025 by operators with... ...engineer hire, building the platform end-to-end with particular... ...generative thinker ~ SF North Beach, 5 days in-person... ...) Work policy: On-site, 5 days/week +...PlatformWebsiteFull timeH1bVisa sponsorship$103.96k - $129.95k
...Brex is the intelligent finance platform that enables companies to spend... ...spend effortlessly. Brex's AI-native automation and world-class... ...the Chief Technology Officer (CTO), you will provide comprehensive... ...interview panels. Serve as the on-site point of contact for external...PlatformWebsiteWork at officeRemote workWork from home
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