Founding Full-Stack Engineer Jobs - December 2025

Alfie.io builds AI-powered tools that help small and mid-sized e-commerce brands reach new customers who are already interested in their products. We automate outreach, rankings, and discovery of affiliates, creators and ambassadors using LLM-driven workflows…

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 for sale on …

PrecisionBiome builds personalized gut-microbiome therapies and is scaling its platform. Role: own the full stack connecting lab data → models → patient/clinician outcomes. Strength in one or more of data pipelines, distributed systems, ML in production, priv…

Enterprises are drowning in unstructured documents and outdated workflows; we see a massive opportunity to build the next big enterprise automation platform to transform how work gets done, starting with commercial construction. Join now and be at the ground …

Build the core of an AI platform already used by 40+ nonprofits including UC Berkeley, SMASH, and the Kapor Foundation. Several partners have boosted their fundraising campaigns by hundreds of percent with PosterChild. As our one of first engineers you’ll wor…

AI-powered Admin for Additional Support Needs Teachers. We recently won CivTech 10, giving us amazing access to teachers and political leverage to make something exception happen in this space. Join a multi-award winning team, dedicated to using AI to helping…