Job Title: Senior Full-Stack Engineer (Freelance/Contract) NexaFlow is seeking a Senior Full-Stack Engineer to develop a proof-of-concept code review tool powered by large language models (LLMs). Key Responsibilities: - Design and implement a prototype tool that leverages LLMs to automatically review pull requests. - Integrate LLM APIs (OpenAI/Anthropic) to identify bugs, security vulnerabilities, and code style issues in code submissions. - Post contextual feedback directly on pull requests. - Handle the entire development process independently, from architecture through deployment. - Collaborate remotely with the NexaFlow team as needed. Requirements: - 5+ years of full-stack development experience. - Proficiency in integrating LLM APIs such as OpenAI or Anthropic. - Experience developing code review tools and working with CI/CD pipelines. - Strong ability to independently manage end-to-end product development. - Backend expertise in Python or Node.js. - Frontend experience with React or Vue. - Familiarity with Docker-based deployment. Additional Information: - This is a freelance/contract position, not a full-time employment role. - Location: San Francisco (remote friendly).