Founding Full Stack 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.

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 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.

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.

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.

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.

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.