Founding Engineer Jobs

High-impact founding engineering role building AI-native, production-grade legaltech infrastructure for a seed-funded startup seeking a bilingual (EN/ES) backend-first senior engineer in Miami or NYC.

Be a founding engineer at TierZero, designing and shipping agentic AI, RAG, and scalable infra to accelerate production engineering workflows.

Founding Engineer to build real-time voice agents, generative UIs, and LLM orchestration at an early-stage SF startup backed by a $6M seed.

Help build Bild AI's core product as a founding product engineer, shipping end-to-end features that turn messy blueprint and construction data into simple, usable interfaces.

Help build TierZero's core product as a founding engineer, designing agentic AI systems and scalable infra to accelerate how teams run production code.

Help invent and build agentic AI systems, ML pipelines, and scalable infra as a founding technical team member at TierZero in San Francisco.

Parq seeks a Founding GTM Engineer to architect and operate a data-driven, LLM-orchestrated growth engine that scales outbound and inbound pipeline for Hazel in the building materials sector.

Help invent and ship TierZero's core agentic AI and production infrastructure as a founding engineer working from our San Francisco office.

Help build TierZero's core product as a founding engineer focused on LLM-driven agents, scalable infra, and observability for production systems.

Neuroscale seeks a hands-on Founding Data Engineer to architect and operate production-grade data and search infrastructure that powers its AI recruiting platform.

High-impact backend engineer role at a fast-growing insurance infrastructure startup, focused on building core systems, databases, and cloud infrastructure in San Francisco.

Hyperspell is hiring a founding platform engineer to build and scale the production infrastructure that powers its context and memory layer for AI agents.

Work as a founding software engineer at Nova Intelligence to build platform infrastructure and reliable AI Agents that operate at enterprise scale for SAP customers.

High-impact founding role for a GTM Engineer to design community-led acquisition loops and instrument growth funnels at a mission-driven education fintech backed by top VCs.

Founding Software Engineer at Loula to build and lead the full-stack product from the ground up, driving architecture, product roadmap, and customer-informed development to improve health outcomes for new families.

Work as a founding engineer at an early-stage, venture-backed consumer startup to build the full product stack and AI model layer end-to-end.

Experienced full-stack engineer needed to build and scale Nestmed's real-time AI documentation platform, owning backend-to-frontend product areas and driving enterprise-ready features.

Forge — backed by OpenAI and Founders Fund — is hiring a Founding Recruiter in San Francisco to build and run the company’s world-class, scalable recruiting function and hire the first wave of exceptional talent.

Help design and ship TierZero’s core agentic AI and infrastructure features as a founding engineer working closely with leadership and customers to productionize LLM-driven observability.

As a Founding Product Engineer at a venture-backed NYC startup, you'll define and build core product systems and AI-driven marketing experiences while owning key product and engineering decisions.

Founding Backend Engineer at Clipbook to architect and build scalable backend and data systems that put LLMs and multimodal pipelines into production for real-world media monitoring workflows.

TierZero is looking for a founding engineer to design and ship agentic LLM-driven infrastructure and observability systems, working closely with leadership and customers to build the core product.

Lead the technical foundation at (RE)VIVE as a founding Senior Engineering Lead, building and scaling backend systems for a sustainability-driven commerce startup.

Clera is hiring a Founding Engineer from the DACH region to live and build with the team in a San Francisco hackerhouse, developing agentic AI systems to automate headhunting.

Help architect and build core agentic AI systems, ML infrastructure, and full-stack features at an early-stage, Series A company focused on production-grade AI observability and engineering workflow automation.

Lead technical sell-through, deployment, and ongoing success as Bernard’s first Solutions Engineer, bridging product, engineering, and enterprise field-service customers.

Skiffra is hiring a Founding Full-Stack Engineer to design and ship AI-native systems that translate messy operational reality into fast, reliable decision tools for real users.

Lead the mobile and web product as the founding Full Stack Engineer for a Series A startup building payments and reimbursement rails for education savings accounts.

Join TierZero as a founding technical team member to design and ship agentic AI systems, ML infra, and full-stack features that improve production engineering velocity.

Lead the technical vision and build the product end-to-end as a hands-on CTO at an early-stage AI-powered fundraising startup connecting founders and investors.

Lead subsurface strategy and reservoir modeling for a next-gen geothermal venture, defining site selection, well architecture, and development plans to unlock scalable clean firm power.