Founding Engineer Jobs - December 2025

Magnetic (YC S25) is building an AI tax preparer for accounting firms using vision models to extract and structure data from tax documents and automatically populate legacy tax software. Hiring multiple founding roles for a small, senior, in-person team in Sa…

Phrasing is a language learning application optimized for learning and maintaining multiple languages, and designed to take you all the way to fluency and beyond. It's the professional language learning application for serious learners. It's built with Elixir…

foam is building a new observability stack purpose-built for AI to capture, trace, and link everything and feed complete context into AI to automatically identify and root-cause breakages. The team is five people; Perla (CEO) was the 5th engineer at Affirm (p…

Bevyl is a pre-seed startup (team of 2) building AI-powered content creation tools for consumer brands. We're making it possible for brands to produce high-quality social media content at scale without agencies or massive creative teams. You'll work with me (…

GetFast is a small team on a mission to simplify running through wearables data. Seeking a founding engineer to shape product and company direction, work across the stack from building reliable, scalable systems to rapidly prototyping and launching new user-f…

Metly is a pre-seed startup (team of 5) building strategic intelligence for pharmaceutical companies. We're aiming to replace consultants. Pharma companies hold critical knowledge across disconnected systems—regulatory filings, clinical pipelines, competitive…