Sergei L.

I automate the repetitive, connect the disconnected, and build pipelines that hold up in production — web scraping, API integrations, AI agents, and ETL, built to scale and ready for real use.

I design and build automation systems that eliminate manual work, connect disparate tools, and turn raw data into something useful. From one-off integrations to production-grade pipelines, I work across the full stack — data, logic, and delivery.

What I build:

Data & Scraping

Large-scale web crawlers for static, dynamic, and login-protected sites (Python, Playwright, Scrapy)
Long-running pipelines with retries, rate limiting, scheduling, and monitoring
Structured data delivery — CSV, SQLite, PostgreSQL
Market, price, and competitor tracking systems

Automation & Integrations

API integrations between SaaS tools, internal systems, and third-party services
Browser and desktop automation for repetitive workflows
ETL pipelines for analytics, reporting, and ML use cases
Aggregation platforms and internal data tooling

AI & LLM Workflows

AI agents for research, monitoring, and decision-support tasks
LLM-powered data validation, normalization, and quality checks
Automated pipelines that incorporate Claude, GPT, or Gemini where they genuinely add value

How I work:
I use AI-assisted development as a standard part of my process — Claude Code, Cursor, and Gemini for faster iteration and better output quality. This isn't a gimmick; it means tighter code, faster turnaround, and pipelines that are easier to maintain long-term.
What you can expect:

Clean, documented, handoff-ready deliverables
Honest scoping — I'll tell you what's realistic before we start
Systems built to scale, not just to work once

Whether you need a scraper, an integration, an AI agent, or a full data pipeline — I can take it from spec to production.