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gelevanog/README.md

Ivan Savchenko — AI-First Full Stack Developer

I build LLM apps and publish the numbers — including the failures. Python · TypeScript · LangGraph · FastAPI · Next.js · PostgreSQL + pgvector

🔗 Try the interactive demos — in your browser, no API key

https://gelevanog.github.io/gelevanog/

Project (demo) What it does Repository
Bulwark A firewall for LLM apps against prompt injection and data leaks. code
PII Shield A gateway that hides personal data from the LLM provider and restores it in the answer. code
Clearance A company RAG that answers only from documents each user may already open. code
Tally Ask a database in plain English; get checked read-only SQL, a chart and an answer. code
Scout An AI sales rep that quotes a source for every fact and waits for your approval. code
Switchboard Secure MCP servers between AI assistants and your CRM, helpdesk and databases. code
Callie A voice agent that answers calls, books appointments and hands off to a human. code
Sift Describe the data you want; get clean structured JSON from a website. code
Notewell A demo AI scribe that cites a quote for each note line and flags what it cannot verify (synthetic data, not for clinical use). code
Shelfwise A catalog copilot that checks a supplier’s colors, patterns and pack sizes against the photo, and the listing’s specs against the feed, before a person approves. code
Relay Business automations where the AI proposes, code decides and doubts wait for a person. code
Recut A clipper that turns long videos into captioned vertical clips and waits for your approval. code
Support Autopilot An AI agent that resolves routine support tickets and asks a human before anything risky. code
DocuChat Chat with your documents and get cited answers, or an honest “I don't know”. code
Distillery Distill a large LLM into a small cheap model for one task and measure if it is good enough. code
CRM Copilot LLM features inside an existing multi-tenant SaaS, with the same permissions as the user. code
DocExtract Invoices and emails become validated records: an LLM reads, code checks, a person reviews doubts. code

Open to remote full-time roles and freelance projects. LinkedIn · Upwork · gelevanog@gmail.com

This repository is also the source of the portfolio site. How to add a project: docs/ADDING_PROJECTS.md.

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  1. crm-copilot-nextjs crm-copilot-nextjs Public

    LLM features added safely to an existing SaaS app: a tool-calling copilot with approval-gated write actions, saved conversations, structured outputs and natural-language filters. Works with HubSpot…

    TypeScript

  2. docuchat-rag docuchat-rag Public

    Self-hosted RAG app: chat with your PDFs/DOCX/Markdown and get cited answers. Hybrid search (pgvector + full-text, RRF) with re-ranking (MRR 0.85 → 0.91 with real embeddings), streaming, retrieval …

    Python

  3. invoice-extraction-django invoice-extraction-django Public

    LLM invoice & receipt extraction for PDFs, scans and photos (Tesseract or vision OCR), with deterministic validation, a human review queue and per-vendor learning from corrections (Django, DRF, Cel…

    Python

  4. support-agent-langgraph support-agent-langgraph Public

    LangGraph AI agent that resolves e-commerce support tickets: tool calling, pgvector help-center search with citations, deterministic business rules, human approval, audit trail, OpenTelemetry traci…

    Python

  5. llm-distillation-pipeline llm-distillation-pipeline Public

    LLM distillation pipeline: a large teacher LLM generates and labels training data, filters clean it, a small student is LoRA fine-tuned and scored on a hand-labeled gold set. Real run on free model…

    Python

  6. pii-redaction-gateway pii-redaction-gateway Public

    OpenAI-compatible gateway and Python library that strips personal data (names, emails, cards, IBANs, secrets) before a request reaches an LLM and restores it in the answer, streaming included. On 2…

    Python