Founding Engineer Jobs - December 2025

Join as the 4th team member to redefine the most universal interface in business: the spreadsheet. Building an AI spreadsheet that automates knowledge work, allowing users to describe tasks in plain English and get immediate, trustworthy results. Launched a f…

We9re building Cursor for doctors. At Vibrant, we9ve picked the expensive, high-touch, data-heavy subspecialties of functional, integrative, and longevity medicine, and we9ve created AI agents that reduce hours of clinical work to minutes. We9re a world-c…

Founded by the founder of Citymapper, Talk Machine is hiring founding engineers, focusing on backend engineers and ML/voice specialists to build a consumer voice product/platform using AI to improve human communication. Application process involves sending a …

Tracebit is an Accel-backed, UK-founded security product company focused on canaries for intrusion detection. They work with companies like Docker, Riot Games, Synthesia, and Zepz to help detect threats in cloud and enterprise. Current openings include Foundi…

Tendavo helps SMEs win public procurement tenders. Bootstrapped and profitable with around 100 customers. Hiring a Founding Engineer to work side-by-side with the CTO to architect and build the platform, design agents and LLM workflows to replace manual routi…

We are building an autonomous trust layer to enable audits to shift from a compliance burden to a world where auditors can be risk navigators, providing companies the assurance needed to adjust continuously in an ever-changing world. We are a small, product-o…