Igor B.

I build scalable backend systems, data pipelines, and automation platforms used by SaaS, fintech, and e-commerce companies. With 14+ years of backend engineering experience, I specialize in designing high-performance APIs, distributed ETL pipelines, and large-scale automation infrastructure. $500K+ earned on Upwork across 270+ projects building backend systems and data platforms. Key strengths: • Backend architecture (Python, FastAPI, Node.js, .NET, PostgreSQL, Supabase, Celery/RabbitMQ/Redis) • Data pipelines & ETL systems • AI integrations and RAG pipelines on vector databases (pgvector, Pinecone, Qdrant) • Large-scale data extraction and reverse engineered APIs • Distributed workers and automation infrastructure I focus on performance, reliability, and long-term maintainability, delivering backend platforms that grow with the business and remain stable under heavy load. Core technologies Python, FastAPI, Node.js, .NET, PostgreSQL, Redis, Supabase, Qdrant, Pinecone, Docker, Celery, RabbitMQ, Playwright, Selenium, Scrapy, REST APIs, GraphQL, ETL pipelines, RAG, vector search, distributed workers, cloud infrastructure (AWS/GCP/Azure), LLM, Langchain, Langraph, Langfuse, BMAD, DataDome, PerimeterX, AlyunWAF, SmartCaptcha, Akamai, Incapsula/Imperva, Qrator