GPTZero is an AI-focused company backed by prominent investors, working to restore information quality and transparency on the internet. The team includes alumni from top tech companies (Uber, Meta, Microsoft) and research institutions (Princeton, Caltech). As a Senior Machine Learning Engineer, you'll be at the forefront of developing next-generation platforms for verifying information origin, quality, and factuality. The role combines ML research expertise with practical engineering skills, working on state-of-the-art language models and AI agents. You'll join a diverse, experienced team including ex-Google, Meta, and Microsoft engineers, working directly with the CTO, AI research lead, and design head. The position offers competitive compensation ($160K-$210K), equity, comprehensive benefits, and the opportunity to make a lasting impact on the future of writing and information integrity. The hybrid work environment in Toronto or NYC provides flexibility while maintaining collaborative opportunities with the team.