Founding Engineer Jobs

Stardrift is hiring a founding engineer to join a team of 3 in San Francisco. The role focuses on building a personalized AI travel agent: optimizing LLM performance, building evaluation frameworks, integrating with rail and flight network APIs worl…

We’re building a general AI for humanoid robots using world-model-based reinforcement learning trained on large-scale real-world data. This is a founding engineer role. You’ll work directly with the founders and own core parts of the training and da…

Gauge helps companies show up in more AI answers. Search traffic is shifting away from Google into AI chat, and companies are figuring out how to adapt right now. Our system delivers real-time analytics derived from millions of LLM answers, while pr…

Hatchet is an open-source platform for running background jobs at scale. Hiring engineers to build the next class of engineering primitives (queues, background tasks, durable execution). Founded early 2024 after launching a distributed task queue. U…

Founding Engineer @ Conductor (San Francisco, ONSITE). Conductor lets you run a team of coding agents on your Mac. We launched in July through Show HN, and are used by engineers at companies like Linear, Vercel, Notion, Stripe, and YC. We’re on a mi…

Bevyl is a seed-funded startup 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 the…

Help doctors find the right jobs faster using AI — improving pay satisfaction and retention. Building AI tools and data pipelines matching thousands of physicians to better opportunities. Early-stage startup (backed by physician networks). You’ll ow…

We are looking for engineers (ML & backend) to join a startup where we’re building LLM-based forecasting systems that output calibrated probability distributions (not just answers) and improve daily based on new observations. It’s a founding role wi…

Dryft builds intelligent systems that automate complex human decisions in manufacturing operations. We’re a small, talent-dense team with modest roots and a love for the physical world - cars, machines, planes. Our team includes graduates from Stanf…

Miniswap is a marketplace for complex hobbies, starting with Warhammer. We're backed by Y Combinator and have just closed our seed funding round. In the past six weeks since we launched, users have listed $150,000 of tabletop wargaming miniatures fo…

General Catalyst-backed Stealth AI Startup | Founding Engineer | Onsite (New York City) | Full-time We’re building the AI operating system for engineering firms - automating the workflows behind the infrastructure America runs on. Founded by enginee…

At Songscription, we are building state-of-the-art AI models to automate music transcription, with the vision of enabling any musician to learn any song, on any instrument, at any level.

BusbySim is a SysML v2 system safety platform helping engineers design safer aircraft and other safety-critical systems. We are early stage, already working with some of the UK's most interesting aerospace companies, and now looking for our first en…

At Strum AI, we're reimagining technology that powers global supply chain using a fresh AI-first approach. Most supply chains are still stuck with Excel or enterprise tools that take months (and $MM) to adopt. Our mission is to lower that barrier — …

Building a photo-sharing app that uses computer vision to automate parts of sharing photos with friends. Backend ownership role: wire backend, integrate ML pipeline and mobile app, and ship. Stack includes FastAPI, Postgres, Supabase, AWS. Must have…

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 …

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 w…

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…

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…

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 …

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, c…

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. La…

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…

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 …

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 incl…

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 ma…

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,…