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REACH INDUSTRIES is seeking a Founding Data Infrastructure Engineer in San Francisco. You will build the backend for data collection efforts, designing scalable architectures for multimodal data. Idea

Triage is an applied research lab building adaptive security and safety alignment infrastructure for AI systems: defending against novel attack vectors and catching misalignment at inference-time in d

At Falconer, we’re transforming how engineers create, access, and share knowledge. We’re looking for a Founding Backend Engineer to help us build an AI-powered knowledge platform that companies love.

San Francisco, CA · On-site · Full-time Compensation:$150,000–$300,000 + 0.1%–1% equityAbout the Company A Seed-stage AI company (founded 2024, $7.5M raised) building production-grade systems that con

Founding Engineer, Backend & Infrastructure About Backbone Care should be paid for the moment it’s delivered. At Backbone, we’re making that possible for the first time by building the clinical AI lay

The Electric Plant is looking for a Founding Software Engineer in San Francisco to build the software platform integrating IoT hardware and AI. You'll influence architectural decisions and collaborate

Catalog, a San Francisco-based company, is seeking an experienced engineer to develop backend systems for AI-driven commerce. The role emphasizes ownership of significant projects, working on ETL pipe

The role We are hiring a Founding Frontend Engineer to be the tip of the spear for turning Worktrace AI’s ambitious product vision into reality. In this role, you will be a key part of the founding te

About Atomic Semi Atomic Semi is building a small, fast semiconductor fab.It’s already possible to build this with today’s technology and a few simplifications. We’ll build the tools ourselves so we c

David Joseph & Company is seeking a backend engineer in San Francisco. This role involves architecting, building, and scaling core backend systems for AI-driven document intelligence. The ideal candid

Fambot is seeking a Backend Engineer in San Francisco to lead the design and development of core backend services. You will integrate cutting-edge AI technologies with proven software systems. The ide

Variant is code generation with creativity and taste. Instead of a confined conversation, you can generate endless designs from a single idea. Freely explore, discover directions you wouldn’t have tho

About Probably Genetic Probably Genetic is changing the lives of patients living with severe, complex diseases. Our data platform is used by drug developers and patient advocacy groups to develop and

LocationSan Francisco Bay Area Employment TypeFull time Location TypeHybrid DepartmentFinance & Operations About HiggsfieldHiggsfield AI is the leading video AI company redefining synthetic media on s

Overview DevOps Engineer (Founding Team) Location: San Francisco Bay Area Type: Full-Time Compensation: Competitive salary + meaningful equity (founding tier) Backed by 8VC, we're building a world-cla

About SesameSesame believes in a future where computers are lifelike - with the ability to see, hear, and collaborate with us in ways that feel natural and human. With this vision, we're designing a n

Join to apply for the Founding Frontend/Design Engineer role at Rebolt (YC W25) Join to apply for the Founding Frontend/Design Engineer role at Rebolt (YC W25) Get AI-powered advice on this job and mo

Frontend Engineer (with familiarity of full stack) (Founding Team) Location: San Francisco Bay Area Type: Full-Time Compensation: Competitive salary + meaningful equity (founding tier) Backed by 8VC,

Ersilia is hiring an Applied AI Engineer to design and implement core systems for hardware engineering. This role focuses on building AI agents that integrate with enterprise-level engineering tools a

About OpenArt OpenArt is an AI Storytelling and Visual Creation Platform used by millions worldwide. We’re building the next generation of creative tools powered by cutting-edge AI, enabling anyone to

Success Matcher Recruitment is seeking a founding analytics engineer to build a robust data layer from scratch. This role offers total ownership over analytics data models and direct influence on comp

Clera is on the lookout for a founding engineer to join our hackerhouse in San Francisco. You will play a critical role in automating headhunting processes while working closely with our CTO. Ideal ca

About Us Most AI is frozen in place - it doesn't adapt to the world. We think that’s backwards. Our mandate is to build efficient intelligence that evolves in real-time. Our vision is AI systems that

About the Role We're looking for a Staff Backend Engineer who can own major parts of our backend architecture, move fast, and solve complex distributed systems problems at scale.You will work directly