Founding Platform Engineer Jobs in San Francisco, CA

About the role As our founding platform engineer, your mission is to build the infrastructure that makes Hyperspell feel like magic — fast, reliable

…Or you're a deep infrastructure engineer who wants their work to reach real businesses the same day it ships.

We're looking for an ML Platforms Engineer to help build and run the orchestration layer underneath our inference and agent products, the system that schedules workloads

We’re looking for a founding software engineer to own development across our stack, with a strong backend focus.

…Role We're looking for a founding software engineer (member of technical staff) who is obsessed with building agentic AI systems

As Weave's Founding Design Engineer, your job is to make complex engineering data feel simple, beautiful and actionable.

Design engineer who owns the full visual and interactive experience of Jinba's platform.

…reflect your responsibility as a founding engineer.

This Founding Product Engineer role offers $150k–$350k comp plus 0.2%–0.6% equity.

Product Engineer About Cardinal Cardinal (trycardinal.ai) is the AI-native outbound sales platform replacing

…W25) is building the definitive platform for understanding and improving how engineering teams work.

Consus was founded by Eric Magliarditi, who worked at SpaceX and Castelion.

As a Founding Engineer, you will work directly with the founders to build production-grade multi-agent systems, backend infrastructure, and financial data systems

We’re hiring a founding engineer with the judgment skills to decide what we should build and the technical depth to make it work.

…the role Wedge is hiring founding engineers to build our platform side by side with the founding team in San Francisco.