Toptal: Full Stack Engineer - AI

This role requires a highly skilled Full Stack Engineer with a strong focus on AI technologies, particularly in developing and scaling AI-powered products that impact millions of users. Candidates must have proven experience shipping AI features into production with tangible user adoption, demonstrating hands-on expertise with large language models (LLMs) either through APIs or custom implementations at scale. The technical stack emphasizes strong full-stack development skills, specifically in PHP, Python, or JavaScript, with an ability to build performant, user-facing AI interfaces. The position involves rapid prototyping and iterative development of AI solutions, collaborating closely with cross-functional teams including product managers, designers, and engineers to design, implement, and scale innovative AI features across diverse product domains such as content creation tools, e-commerce recommendation systems, and messaging platforms. Ideal candidates will have experience developing consumer AI products that have scaled to large user bases, with additional value placed on strong PHP skills and familiarity with WordPress, e-commerce platforms, or messaging systems. Contributions to open-source projects reflecting technical depth and innovation are considered a plus. The role offers the opportunity to work in a cutting-edge AI lab environment, contributing to the technical vision and strategy for AI product scaling, either on-site in New York City or remotely. This long-term, full-time position suits engineers passionate about leveraging the latest AI advancements to create impactful user experiences at global scale.