Description
UK business is seeking an experienced full-stack developer for an initial paid proof-of-concept, with substantial ongoing work available if the initial project is successful. We are developing a private B2B knowledge and decision-support platform. The application will ingest documents and structured information, provide semantic and natural-language search, return evidence-backed answers, and support a human review and approval workflow. Preferred technology Experience with as many of the following as possible: Python, FastAPI PostgreSQL, pgvector AWS: S3, Lambda and/or ECS, API Gateway React / Next.js REST APIs, Git / GitHub Authentication and role-based access RAG / LLM applications, document ingestion and extraction We particularly want somebody who understands the difference between an LLM and an authoritative knowledge database. The AI must retrieve and reason from controlled knowledge and source evidence — it must not simply generate unsupported answers. Initial Proof-of-Concept Expected to include: document ingestion; structured knowledge records; PostgreSQL database; vector/semantic search; evidence/source storage; natural-language query; AI responses supported by source evidence; basic administrator/review interface; REST API; Git repository; local/development environment; basic automated testing; deployment documentation. The POC will use synthetic/sample data only. The successful developer will not require access to production customer data or our production data s