Founding Engineer Jobs

Founding AI Engineer to prototype and productionize LLM-driven legal AI systems at Norm Law/Norm Ai, working closely with lawyers and product teams to transform expert workflows.

Help shape Noho Labs' telehealth platform as a Founding Full Stack Engineer building core patient and clinician experiences and integrations.

Lead the design and implementation of the event-driven backend and LLM agent infrastructure that coordinates clinicians, support staff, and AI agents in a HIPAA-sensitive, production clinical environment.

Build and scale the core backend systems, APIs, and developer tools that power Kernel's AI agent platform as a founding backend engineer on a small, fast-moving team.

Join Flyway Health as a founding Data/AI engineer to build and scale AI-driven data pipelines and agent systems that power enterprise life-sciences insights.

Own and expand Abacus’s core ML-powered document extraction engine and backend systems as the company’s first Founding Engineer, driving 0→1 development and scalable infrastructure.

Lead the ML stack as a founding Machine Learning Engineer at a stealth, self-funded AI group, defining models, training pipelines, and scalable inference for a global consumer product.

Lead the technical design and implementation of A1’s foundational LLM systems—training pipelines, inference stacks, and deployment architecture—for a global consumer AI product.

Be a founding engineer at Clera, building agentic systems and shipping production features from our San Francisco hackerhouse to automate the headhunting lifecycle.

A hands-on Founding Engineer role at an early-stage AI recruiting startup, responsible for designing and shipping full-stack features and establishing the engineering foundations for growth.

Founding Full Stack AI Engineer role at a funded San Francisco startup building agentic AI prospecting tools, delivering production-grade products for high-growth clients.

Lead product and engineering efforts as a Founding Engineer at an early-stage startup creating an AI-native spreadsheet and workspace in San Francisco.

Founding Software Engineer to design and build a firmware development platform at a seed-stage startup, owning features end-to-end and collaborating directly with the CEO/CTO.

Join an aggressively funded AI startup in San Francisco as a Founding Full-Stack Product Engineer to build telemetry and production systems for LLMs and ship advanced Generative AI features.

Paradigm is looking for a hands-on Founding Engineer to build AI-driven culture intelligence, own the full stack, and shape product and technical strategy at an early-stage, mission-driven company.

As a founding backend engineer at Clipbook, you will design and ship scalable backend and data systems that productionize AI to deliver real-time insights for comms and public affairs teams.

Lead development of Simple AI’s consumer-facing voice AI app as a founding software engineer on a small, fast-growing San Francisco team.

Founding Solutions Engineer to lead technical onboarding and integrations at Juicebox, partnering with sales and product to drive enterprise customer success and scalable implementation playbooks.

Founding Backend Engineer to design and build core backend systems, data pipelines, and production AI integrations for Clipbook, a fast-growing seed-stage leader in AI for communications and public affairs.

Matter seeks a Full Stack Engineer to design, build, and scale end‑to‑end AI/ML features that power an agent management layer for consumer brands.

Lead the design and implementation of petabyte-scale training, fine-tuning, and low-latency model serving infrastructure for an early-stage startup building foundation models for physics.

Founding Engineer needed to own end-to-end full-stack product work at an early-stage AI compliance startup based in New York, delivering polished features and shaping the engineering DNA.

Join Navi as a founding full-stack engineer to build production-grade backend and data systems that power an AI co-pilot used by pilots, flight schools, airlines, and the U.S. Air Force.

Lead the engineering of Concourse's production AI agents to scale LLM-driven financial insights across enterprise customers and shape the product and engineering culture.

Lead the backend architecture for VALA's social video + Web3 platform, owning scalable transaction and media systems that power tipping, trading, and real-time engagement.

Work directly with the founders to build and ship autonomous AI agents that process orders, generate quotes, and make inventory decisions for $Xbn+ customers.

Lead end-to-end product and platform development as a Founding Full-Stack Software Engineer at Fram Energy, building the data and fintech backbone for solar and energy retrofits on rental housing.