Founding Backend Engineer Jobs

Be the founding backend engineer at Known, architecting scalable TypeScript/Node.js services, real-time communication, and infrastructure to power a consumer AI product at scale.

Help build the core platform for a YC-backed startup solving real-world data cleaning and validation with AI and human review as a Founding Engineer in NYC.

Founding Engineer needed to architect and scale Loop AI's backend systems powering delivery intelligence for digital-first restaurants.

Softlight is looking for a founding backend engineer in NYC to build and operate novel AI-backed product systems, ship production features, and help define the company's technical roadmap.

Be a founding full-stack engineer at Truth Systems, owning end-to-end product delivery of real-time governance agents that protect users and meet strict reliability and latency requirements.

Forgepoint seeks a product-minded Founding Engineer to ship end-to-end AI-driven features (TypeScript stack) and help build the company and product from the ground floor in NYC.

Early-stage consumer outreach startup seeks a hands-on Founding Product Engineer to build full-stack features, large-scale email automation, and AI-driven recommendation systems on a fully remote team.

Early-stage P&C insurance fintech in San Francisco is hiring a founding engineer to design and build a resilient, API-first platform as an early team member.

Nash is hiring a founding-level Product Engineer to build and scale core logistics infrastructure while partnering directly with customers to deliver production outcomes.

An early-stage engineering leader role for an Ex-Founder/Founding Engineer to build core logistics infrastructure, ship 0→1 products, and partner closely with customers to drive real-world impact.

Founding Full-Stack Software Engineer needed to design backend systems and agentic AI for a Santa Monica startup building large-scale autonomous cybersecurity agents.

Phaselab is seeking a Founding Backend Engineer who will own and scale backend systems (databases, ingestion, AI) and ship product features rapidly at an early-stage startup.

Help build the core backend infrastructure at DimRed to power large-scale LLM evaluations, agent workflows, and secure multi-tenant production systems.

Sentra is hiring a Founding Backend/Platform Engineer to build scalable backend systems and LLM-integrated platform features at an early-stage, VC-backed startup.