Sobre

We are seeking an experienced full-stack developer with AI integration expertise to build a scalable web platform where users can run searches and pay per query. This project will combine: A clean search UI (web-based) Payment integration (credits/tokens via Stripe or PayPal) Search + AI pipeline (hybrid keyword + semantic search powered by LLMs) Secure user authentication and usage tracking Responsibilities: Design and build the front-end (React/Next.js preferred) with a smooth user experience. Develop the back-end (FastAPI or Node.js preferred) with robust APIs for search queries and AI integration. Set up a scalable database solution (Postgres with pgvector, or vector DB like Pinecone/Weaviate). Implement AI retrieval (RAG) with OpenAI/Anthropic/Azure models, including embeddings, citations, and monitoring. Integrate payments (Stripe/PayPal) to support a credits-per-search system. Ensure security and compliance (user data protection, audit logs, role-based access). Deploy on AWS/GCP with monitoring, logging, and cost control. Requirements: Proven experience in full-stack development (React, Next.js, Node.js/Python). Hands-on experience with LLM integration (OpenAI API, LangChain, or LlamaIndex). Strong knowledge of databases and search systems (SQL + vector search). Experience with payments integration and subscription/usage-based billing. Familiarity with MLOps: deployment, monitoring, cost optimization. Good understanding of secure coding practices. Bonus Skills: Elasticsearch/OpenSearch experience. Prior SaaS or marketplace project experience. Knowledge of AI evaluation frameworks (Langfuse, Weights & Biases, etc.). What We Provide: Clear product vision and workflow (pay-per-search model with credits). Ongoing collaboration on refining features and UX. Potential for long-term engagement to maintain and expand the platform. Deliverables (MVP phase): Functional web app with sign-up/login. Search + AI pipeline with citations. Stripe/PayPal integration with credits-per-search. Admin dashboard to monitor usage, costs, and user activity. Budget: To be discussed (open to hourly or fixed-price proposals). How to Apply: Please include: Examples of similar SaaS or AI projects you’ve built. Your preferred tech stack for this project. Your availability and estimated timeline for building an MVP.