Senior Python Developer with React

As a Full Stack Developer, your role involves building the end-to-end product from backend APIs to a clean, responsive frontend. You will take full ownership of the development process, ensuring quality, scalability, and performance. Key Responsibilities: - Develop, test, and deploy the SaaS platform using FastAPI, React 18, and PostgreSQL. - Implement a split process reduce pipeline for breaking down user prompts and aggregating responses. - Integrate OpenAI SDK (GPT-5 High) and manage structured outputs, token/cost estimations, and performance limits. - Build a responsive and intuitive web interface using React + Vite + Tailwind, including WebSockets for real-time updates. - Implement file upload and parsing (PDF, TXT, DOCX, CSV) with basic OCR support. - Generate PDF and DOCX exports (using Puppeteer, docx/docxtemplater). - Deploy on Railway, manage environment variables, and implement monitoring via Sentry and Plausible. - Maintain database structure and metrics logging in PostgreSQL. - Collaborate closely with the technical lead to ensure code quality, scalability, and security. Qualification Required: - 4-6 years of full-stack experience. - At least one SaaS product built and delivered using FastAPI + React. - Able to work independently with minimal supervision and deliver production-ready code quickly. - Experience with OpenAI SDK or LLM orchestration. Additional Details: The company is looking for expertise in the following technical skills: Backend (FastAPI & Python 3.11+): - Expertise in asynchronous programming (asyncio), retry/backoff strategies with jitter, and timeout management. - Experience integrating OpenAI SDK, handling structured outputs, and managing token usage (tiktoken). - Strong understanding of dependency management, concurrency, and parallel execution. Frontend (React + Vite + Tailwind): - Proficiency in modern React (v18), WebSockets, and responsive UI implementation. - Ability to build clean UIs from wireframes without complex design dependency. Infra & Database: - Hands-on experience deploying to Railway or similar environments. - Knowledge of structured logging, secrets management, and Twelve-Factor configuration. - Familiarity with PostgreSQL, including query optimization and schema design.,