Davi L.

I build AI into real products: LLM agents, RAG chatbots and AI automations wired into your SaaS, CRM and payments, plus the full-stack app around them. I work US hours. Projects from $5K start with a free working prototype before you sign. Proof from production work: • Raised search relevance from 80% to 96% with cross-encoder reranking and benchmarks, on a platform with 1.4M+ users. • Cut production queries from 190 seconds to 2, and automated a two-hour report down to five minutes. • Built a two-way HubSpot sync for a creator-campaign platform: 28K+ deals, stages written back. • Built a pipeline that turns PDF datasheets into structured, searchable data. Top Rated Plus, $100K+ earned on Upwork. "Davi was outstanding to work with! He was always faithful to deadlines, extremely accessible, and demonstrated a deep expertise in Python and SQL." (client review) What I build • AI features inside your SaaS: LLM integration, agents, copilots and semantic search, with permissions and audit logs. • RAG chatbots and assistants that answer from your own documents and show the source. • Document extraction: PDFs, invoices and forms turned into validated data, with human review where it matters. • AI agents and workflow automation connected to your CRM, Stripe, Supabase and internal APIs, with approvals and error handling so no record is silently dropped. • Search and recommendation engines: keyword plus semantic search, reranking, relevance benchmarks. • Full-stack SaaS builds, and take-overs of apps that already have users. How it works 1. Send me the problem. Within one business day you get a plan, a fixed price and a timeline. 2. Projects of $5K or more start with a free working prototype of the core flow, built on your use case after a short call. 3. Fixed-price milestones, usually 2-3 week sprints, with a working demo at each one. You own the code. 4. After launch: monthly support, or 15-20 hours a week as your part-time AI engineer. You work directly with me, the senior developer writing the code. See it working: the Portfolio section has live demos you can click through, including an AI document workspace, an AI CRM, an integrations hub and a SaaS dashboard. Core stack: Claude (Anthropic) and OpenAI (GPT) APIs, LLM agents, RAG, embeddings and vector search, Elasticsearch, n8n, Python, Django, FastAPI, Next.js, React, TypeScript, Node.js, Supabase, PostgreSQL, BigQuery, Stripe, HubSpot, AWS, Docker. Tell me what you want the AI to do and where your data lives. If AI is not the right tool, I'll say so.