Sergey Saraev

GitHub·

Backend systems engineer.

I audit and harden automations, integrations, and retrieval systems — lost records, silent duplicates, missing retries, and retrieval that quietly returns the wrong evidence — then fix what I find and prove it with tests. Most of that work centers on CRM-driven lead pipelines — hands-on with Bitrix24 and amoCRM from real estate work, and the underlying process (capture, routing, dedup, follow-up) carries over to any CRM.

Selected work

Make Automation Reliability Audit

A hands-on check of a real automation before trusting it with live leads — found where they could quietly go missing, and what to fix first.

6 issues found · ranked by real business risk

Make · Airtable · HubSpot

RAG Knowledge System

Ask a question about a pile of documents and get a real, checkable answer — with the exact page it came from, not a guess.

Local-first · 57K documents · 414 tests

Python · FastAPI · Qdrant · Postgres

Lead Pipeline Reliability Platform

No lead falls through the cracks between a form and a CRM — failures get caught, retried, and never processed twice.

In production · real leads, zero duplicates

Python · FastAPI · Postgres · n8n

Real Estate Listing Automation

Forward a client's email with photos and get a ready draft listing back in minutes — you just check it and hit publish.

In production · Human-reviewed AI drafting

Python · FastAPI · SQLite · DeepSeek API